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94E10E01 - Repair Receiver-Transmitter RT-__ARC-186_V_

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					                            Repair Receiver-Transmitter RT-(*)/ARC-186(V)
                                      94E10E01 / Version FG2
                                             14 Apr 2010

SECTION I.       ADMINISTRATIVE DATA

All Courses        Course Number                     Version         Course Title
Including This     101-94E10                         FG2             Radio and Communications Security (COMSEC)
Lesson                                                               Repairer (94E/94L OEMTD Draft)
                   101-94E10                         SBT             Radio and Communications Security (COMSEC)
                                                                     Equipment Repairer (94E/94L SBT Draft)

Task(s)            Task Number                      Task Title
Taught(*) or
Supported
                                                    INDIVIDUAL
                   093-94L-1302                     Repair Receiver-Transmitter RT-(*)/ARC-186(V)(*)

Reinforced         Task Number                      Task Title
Task(s)


Academic          The academic hours required to teach this lesson are as follows:
Hours
                                                Resident
                                             Hours/Methods
                                             7 hrs                 / Conference / Discussion
                                             2 hrs                 / Demonstration
                                            41 hrs                 / Practical Exercise (Hands-on)
                  Test                       0 hrs
                  Test Review                0 hrs

                      Total Hours:          50 hrs

Test Lesson                                              Hours                      Lesson No.
Number
                                 Testing
                         (to include test review)                                   N/A

Prerequisite       Lesson Number                    Lesson Title
Lesson(s)          94E10A01                         Detect Direct Current (DC) Circuits
                   94E10A02                         Detect Alternating Current (AC) Circuits
                   94E10A03                         Detect Analog Circuits
                   94E10A04                         Detect Digital Circuits
                   94E10A05                         Communication Systems
                   94E10A06                         Practical Fiber Optics
                   94E10A07                         Basic Telephone Systems
                   94E10A08                         Soldering
                   94E10B01                         Course Orientation
                   94E10B02                         Shop Operations

Clearance         Security Level: Unclassified
Access            Requirements: There are no clearance or access requirements for the lesson.

Foreign           FD5. This product/publication has been reviewed by the product developers in
Disclosure        coordination with the FORT GORDON, GA foreign disclosure authority. This
Restrictions      product is releasable to students from all requesting foreign countries without
                  restrictions.




                                                             1
References                                                                                       Additional
                  Number                 Title                            Date                  Information
                  DA PAM 750-8           The Army Maintenance        22 Aug 2005
                                         Management System
                                         (TAMMS) Users Manual
                  TB 385-4               Safety Requirements for     01 Jul 2008
                                         Maintenance of Electrical
                                         and Electronic Equipment
                  TM 11-5821-318-12      Operator's and Aviation     15 Jan 1986
                                         Unit Maintenance Manual
                                         for VFH AM/FM Radio
                                         Set, AN/ARC-186(V)
                                         (NSN
                                         5821-01-086-62430(EIC:
                                         N/A)(Reprinted W/Basic
                                         Incl C1)(This Item is
                                         Included on EM 0051, EM
                                         0140, and EM 0173)
                  TM 11-5821-318-30      Aviation Intermediate       01 Sep 2005
                                         Maintenance Manual for
                                         VHF AM/FM RADIO SET,
                                         AN/ARC-186(V)
Student Study     None
Assignments


Instructor        CERTIFIED INSTRUCTOR MOS 94E20 OR HIGHER
Requirements
                  1. Check for presence of all necessary training materials and manuals.

                  2. Make sure all test equipment is operational.

Additional                                                               Stu
Support           Name                                                  Ratio       Qty          Man Hours
Personnel         None
Requirements
Equipment         Id                                                   Stu       Instr
Required          Name                                                Ratio      Ratio    Spt       Qty       Exp
for Instruction   5821-01-086-6243                                     1:2                Yes             1   Yes
                  RADIO SET
                  6625-01-432-8369                                                        Yes             0   No
                  TEST SET, RADIO
                  * Before Id indicates a TADSS

Materials         Instructor Materials:
Required          a. All lesson plans
                  b. Diagram Booklet
                  c. Operational Test Booklet
                  d. Information Booklet
                  e. Required TMs
                  f. Electronic Media

                  Student Materials:
                  a. Work Book
                  b. Diagram Booklet
                  c. Operational Test Booklet



                                                     2
                 d. Information Booklet
                 e. Required TMs


Classroom,       General Instruction Building
Training Area,
and Range
Requirements

Ammunition                                                                        Stu       Instr      Spt
Requirements     Id     Name                                            Exp      Ratio      Ratio      Qty
                 None
Instructional    NOTE: Before presenting this lesson, instructors must thoroughly prepare by studying this
Guidance               lesson and identified reference material.
                 COE Integration:
                 The student will be aware of Contemporary Operational Environment factors such
                 as extreme temperature differences, unstable political state and hostile locals are of
                 the essence to maintain vital Maintenance support.


                 NOTE: Before presenting this lesson, instructors must thoroughly prepare by studying this
                       lesson and identified reference material.




Proponent        Name                        Rank         Position                           Date
Lesson Plan
Approvals




                                                      3
SECTION II.      INTRODUCTION


                 Method of Instruction: Conference / Discussion
                 Instructor to Student Ratio is: 1:20
                 Time of Instruction: 5 mins
                 Media: Large Group Instruction

Motivator         One of the radios in the 94E field is the AN/ARC-186(V). This radio combines both
                  AM and FM capabilities. During this lesson, you will learn the function and
                  operation of the RT-1354/ARC-186(V) along with the capability to troubleshoot the
                  system.



Terminal          NOTE: Inform the students of the following Terminal Learning Objective requirements.
Learning
Objective         At the completion of this lesson, you [the student] will:


                  Action:           Repair RT-1354/ARC-186(V)

                  Conditions:
                                    Given a defective RT-1354/ARC-186(V), applicable test equipment,
                                    and TM 11-5821-318-30.

                  Standards:
                                    The student must isolate two out of three defective modules within
                                    45 minutes per problem IAW TM 11-5821-318-30.


Safety            Remove watches, rings, and other metallic objects from hands and around the neck.
Requirements
                  When making test measurements on live voltage circuits in equipment, keep one
                  hand in your pocket.

                  Know the use and location of power switches, circuit breakers, power cutoff devices,
                  before commencing work on equipment.

                  Never engage in horseplay around powered circuits.

                  Maintain an alert professional bearing while working with electrical power/circuits
                  and observe ALL SAFETY PRECAUTIONS.

Risk              Low
Assessment
Level

Environmental     NOTE: It is the responsibility of all Soldiers and DA civilians to protect the environment from
Considerations    damage.
                  NOTE: It is the responsibility of all Soldiers and DA civilians to protect the environment from
                  damage.
                  None

Evaluation        STUDENT CERTIFICATION IS BASED ON SUCCESSFULLY UNDERSTANDING
                  OF ALL MATERIAL COVERED IN THIS LESSON PLAN.




                                                         4
Instructional
Lead-In




                5
SECTION III.    PRESENTATION


NOTE:     Inform the students of the Enabling Learning Objective requirements.
A.        ENABLING LEARNING OBJECTIVE

           ACTION:          Define the purpose, use, and functions of RT-1354/ARC-186(V).
           CONDITIONS:      An RT-(*)/ARC-186(V) and a maintenance request form have been
                            turned in to your avionics shop. Your supervisor has directed you to
                            restore the receiver-transmitter to operational status, given the
                            following: Receiver-Transmitter RT-(*)/ARC-186(V); AN/GRM-122,
                            static work station, NSN 4940-01-087-3458; Tool Kit TK-105A/G;
                            applicable repair parts; DA Form 2407; local SOP; TM
                            11-5821-318-30; DA Pam 738-751; and TB 385-4. NOTE: If any of
                            the above equipment is obsolete or not available, use equivalent
                            equipment.

           STANDARDS:       Restored the receiver-transmitter to operational status in
                            accordance with references listed in the performance measures.



1.        Learning Step / Activity 1. Radio Set Purpose and Use
                 Method of Instruction:   Conference / Discussion
           Instructor to Student Ratio:   1:20
                   Time of Instruction:   10 mins
                                Media:    Large Group Instruction

          NOTE:      Show Slide 94E-E01-S01

          a. Purpose.

               (1) To provide normal voice communications capability in both
                     AM and FM bands.

          b. Use.

               (1) When used with associated equipment, the radio set will
                    provide
                    (a) Secure voice communications.
                    (b) Direction Finding (DF) in the AM Band.
                    (c) Homing in the FM band.
                    (d) Radio relay operation.
                    (e) Guard frequencies (AM/FM).
                    (f) Operates in AM and FM, AM only or FM
                         only.


NOTE:     QUESTION: In what band would you used the DF capabilities?
          ANSWER: AM band.

          QUESTION: In what band would you use the homing capabilities?
          ANSWER: FM band.




                                                    6
     QUESTION: What is the purpose of the AN/ARC-186(V)?
     ANSWER: Provides normal voice communications in both AM and FM.



2.   Learning Step / Activity 2. Radio Set Description and Performance Data
            Method of Instruction:   Conference / Discussion
      Instructor to Student Ratio:   1:20
              Time of Instruction:   20 mins
                           Media:    Large Group Instruction

     NOTE: Show Slide 94E-E01-S02
     a. Major components.

         (1) RT-1354/ARC-186(V) a self contained line replaceable unit
              (LRU).
         (2) RT-1300A and RT-1300B remote RT's.
         (3) C-10604 and C-10606 are controls for the
               remote RT's.

     b. Connectors.

         (1) Receptacle J1 and J2 connect RT to aircraft wiring.
         (2) Receptacle J3 connects RT to FM antenna or combination
              VHF AM/FM antenna.
         (3) Receptacle J4 connects RT to VHF AM antenna.

     c. Antennas, AM and FM.

         (1) Actual antenna types will vary with type of aircraft in which
              system is installed.

     NOTE:    Show Slide 94E-E01-S03

     d. Radio set performance data.

         (1) Frequency range.

              (a) AM receive-transmit 116.000 to 151.975 MHz.
              (b) AM receive only 108.000 to 115.975 MHz.
              (c) FM receive-transmit 30.000 to 87.975 MHz.
              (b) Channel spacing 25 kHz in all bands.
              (c) Preset channels 20 with electronic memory.
              (d) Carrier power 10 W minimum into 52 ohms, AM and
                   FM.
              (e) Duty cycle 5 minutes receive, 1minute transmit.




                                                7
                    (f) Sensitivity.

                         1. AM 3 microvolts (open circuit) for 10 dB s+n/n with
                             30 percent modulation at 1000 Hz.
                         2. FM 0.7 microvolts (open circuit) for 10 dB s+n/n
                             with 5 kHz deviation at 1000 Hz.

                    (g) Transmitter modulation.

                         1. AM adjustable for 80 percent minimum.
                         2. FM adjustable for +5 kHz nominal deviation.

                    (h) Power input.

                         1. Service 24 to 33 V DC.
                         2. Emergency 18 V DC.

                   NOTE:    Show Slide 94E-E01-S04


        e. Modules.

            Seven modules used.

             (a)   Transmitter A1.
             (b)   Power supply A2.
             (c)   Audio card A3.
             (d)   Receiver A4.
             (e)   Synthesizer A5.
             (f)   Motherboard A6.
             (g)   Panel control A7 panel mounted models.
             (h)   Serial Receiver A8 remote models.


NOTE:   QUESTION: What receptacle connects the RT to FM antenna or combination VHF / AM/FM
                           antenna?
        ANSWER: J3.

        QUESTION: What is the FM frequency range of the AN/ARC-186(V)?
        ANSWER: 30.000 to 87.975 MHz.

        QUESTION: What is the channel spacing of the AN/ARC-186(V)?
        ANSWER: 25 kHz.



3.      Learning Step / Activity 3. Controls and Indicators
               Method of Instruction:   Conference / Discussion
         Instructor to Student Ratio:   1:20
                 Time of Instruction:   25 mins
                              Media:    Large Group Instruction

        NOTE: Show Slide 94E-E01-S05
        a. Frequency selectors and indicators.

             (1) 0.025 MHz selector.


                                                   8
    (2) 0.025 MHz indicator.
    (3) 0.1 MHz selector.
    (4) 0.1 MHz indicator.
    (5) 1.0 MHz selector.
    (6) 1.0 MHz indicator.
    (7) 10 MHz selector.
    (8) 10 MHz indicator.

b. CHAN selector (preset channels).

c. CHAN indicator (preset channels).

d. VOLUME control.

e. SQ DIS/TONE select switch.

    (1)    Three position switch.
    (2)    Center position enables squelch.
    (3)    SQ DIS position disables squelch.
    (4)    TONE position transmits 1000 Hz tone, used with security
equipment.

f. EMER AM/FM/MAN/PRE select switch.

     (1) Four position rotary switch.
     (2) PRE position enables preset channel selection.
     (3) MAN position enables manual frequency selection.
     (4) EMER AM selects a pre-stored AM guard channel.
     (5) EMER FM selects a pre-stored FM guard channel.

g. OFF/TR/DF (mode select) switch.

     (1)   Three position rotary switch.
     (2)   OFF position disables radio.
     (3)   TR position enables receive-transmit modes.
     (4)   DF position enables transmit, receive, or homing.

NOTE:      Show Slide 94E-E01-S06

h. WB/NB/MEM LOAD switch (under snap-on cover).

     (1) Three position switch.
     (2) NB position enables narrowband selectivity (IF).
     (3) WB position enables wideband selectivity (IF) in the FM
          band.
     (4) MEM LOAD position (momentary) allows manually
          selected frequency to go into selected preset channel
          memory.

i. AM SQUELCH control (under snap on cover).

     (1) Screwdriver adjustable potentiometer.
     (2) Squelch overridden at maximum counter clockwise


                                          9
                 position.
            (3) Clockwise rotation increases input signal required to open
                 the squelch.
        j. FM SQUELCH control (under the snap on cover).

             (1) Screwdriver adjustable potentiometer.
             (2) Squelch overridden at maximum counter clockwise
                  position.

             (3) Clockwise rotation increases input signal required to open
                  the squelch.

        k. LOCKOUT FM/AM switch.

             (1)   Screwdriver setable, three position switch.
             (2)   Center position enables both AM and FM bands.
             (3)   AM position locks out AM band.
             (4)   FM position locks out FM band.
             (5)   Band lockout is indicated by a warning tone.


NOTE:   QUESTION: Which control position disables the squelch on the RT-1354/ARC-186(V)?
        ANSWER: SQ DIS position.

        QUESTION: What control selects a pre-stored AM guard channel?
        ANSWER: EMER AM.

        QUESTION: What control selects preset channel frequency?
        ANSWER: PRE.



4.      Learning Step / Activity 4. Transmit Mode Signal Flow
               Method of Instruction:   Conference / Discussion
         Instructor to Student Ratio:   1:20
                 Time of Instruction:   1 hr
                              Media:    Large Group Instruction

        NOTE: Show Slide 94E-E01-S07
        a. Audio card A3.

            (1) Transmit Control Switching.

                   (a) Transmit control U3C connects audio inputs to audio
                         output circuits.
                   (b) U3C is high connecting voice audio to U4B and U8B.
                   (c) U3C is low in X-mode connecting audio to WB amplifier
                        U8D.
                   (d) Output U3C applied to U4C and U3B.

            (2) AM/FM switching.

                   (a) 100 MHz line applied from A7.
                   (b) 100 MHz line logic 1 for AM mode.



                                                  10
         (c) Controls which output amplifier is connected in transmit.

              1. AM signal applied to AM output amplifier U9C.
              2. FM signal applied to FM output amplifier U9A.

    (3) Invalid band switching.

         (a) U6C connects 150 Hz and 1,000 Hz tone generator
                to receive audio circuits.
         (b) Tone warns pilot invalid frequency selected.
         (c) Inputs from A7.

              1.   100 MHz line indicates AM or FM.
              2.   SQ tone disable.
              3.   TONE KEY, 0 is transmit.
              4.   INVALID BAND, 0 is invalid.

         (4) Retransmit switching.

              U3A connects retransmit audio to transmit audio circuits.

         (5) SMO key switching.

              (a) Input pin h applied to Q4, U1B, and U6B.
              (b) SMO key switch U6B provides output for valid band
                     transmissions.
              (c) Output applied to A5, A4A2, and A7.

       NOTE:       Show Slide 94E-E01-S08

b. Synthesizer A5.

    (1) Consists of four subassemblies.

         (a) Lower loop VCO A5A1.
         (b) Output loop VCO A5A2.
         (c) Output loop A5A3.
         (d) Lower loop A5A4.

    (2) Provides injection frequencies for receive and transmit.
    (3) Receive injection frequency offset 25 MHz for AM, 12 MHz
         for FM.

    (4) FM transmit mode.

         (a) Frequency selection information applied to FREQ
              CONT and PROM U17.
         (b) SMO key, pin h, applied to U17, VCO control, and
              switch control.
         (c) VCO CONT enables A5A2.

              1. Enabled only during FM transmit.
              2. 30 52 MHz low band.
              3. 52 88 MHz high band.

         (d) SW CONT energizes K2.



                                          11
         (e) 100 MHz line applied to SW CONT and A1A3U5B.

                     Switches to AM or FM.

         (f) SW CONT energizes K1.
(g) A5A1 contains three VCO's.

              1.   42 63.975 MHz FM low band.
              2.   64 99.975 MHz FM high band.
              3.   116 176.975 MHz AM band.
              4.   One VCO enabled at a time.
              5.   Tuned by A5A4.

         (h) Output A5A1 applied to mixer M1 of A5A3.
         (i) A5A3 used only in FM transmit.
         (j) A5A2 output applied to mixer A5A3M1 with output from
               A5A1.
         (k) Output amplified by Q2 and Q3.
         (l) Signal applied to FREQ CONT U1 U4.
         (m) 12 MHz oscillator output amplified by Q5 and Q6.
         (n) FM AUDIO applied to A5A3R18 deviating injection
                frequency.
         (o) Signal applied to U1 U4.
         (p) U1 U4 provides fine tune output to A5A2.
         (q) U1 U4 compare two signals.
         (r) If U1 U4 output 12 MHz, U1 U4 allows transmit
               enabling.
         (s) A5A2 provides transmit injection frequency to K1.
         (t) Injection frequency goes through K2 to A1A1U1.

    (5) AM transmit mode.

         (a) 116 176.975 MHz VCO in A5A1 enabled.
         (b) Output applied through Q7 and T2 to K1 and K2
              to transmitter A1.

NOTE:    Show Slide 94E-E01-S09

c. Transmitter A1.

    (1) Consists of four subassemblies.

         (a) Pa/filter A1A1.
         (b) Connector card A1A2.
         (c) ALC card A1A3.
         (d) Fuse board A1A4.

    (2) Receive mode.

         (a) XMIT KEY, pin 16, logic 1, applied to BAND CONT,
               FLTR/ANT SW CONT, and ANT SW.
         (b) Transmitter disabled.
         (c) Input signal from antenna passes through ANT SW
               to RF receiver A4A2.

    (3) Transmit mode.



                                          12
                 (a) XMIT KEY LOGIC 0 applied to BAND CONT,
                      FLTR/ANT SW CONT, and ANT SW.
                 (b) Transmitter enabled.
                 (c) FM H and 100 MHz line applied to BAND CONT.

                     1. 100 MHz line switches circuits to AM or FM.
                     2. FM H enables filter FM H.

                 (d) Output of BAND CONT applied to FLTR/ANT
                      SW CONT.
                 (e) FLTR/ANT SW CONT.

                     1. Activates ANT SW between AM or FM.
                     2. Enables filters.

                         a. AM filter L2 L4.
                         b. FM H filter L11 L14.
                         c. FM L filter L6 L9.

                 (f) ANT SW selects AM or FM antenna.
                 (g) Injection frequency from A5 applied to A1A1U1.
                 (h) U1 output applied through Q1, Q2, and T4 to filters.
                 (i) RF is filtered and applied through ANT SW to
                      appropriate antenna.
                 (j) V forward from T1, CR7 applied to side-tone gate
                      U2B.
                 (k) Side-tone gate opens when transmit power out
                       exceeds 2 watts.
                 (l) Transmitter output temperature increases, RT1
                      resistance decreases.
                 (m) Comparator U2A output applied to current limit/mod.
                 (n) Transmit output power reduced preventing burn out.
                 (o) AM transmit.

                     1. RF carrier from A5 applied to A1A1U1.
                     2. AM audio applied through R66 to U6D, Q5,
                        and U6B.
                     3. U6D, Q5 provide signal through current limit/mod
                         to driver/pa Q1 and Q2.
                     4. U6B output applied through Q3 and Q4 to U1
                         modulating the carrier.
                     5. Modulated carrier applied to driver/pa Q1 and Q2.
                     6. Signal amplified by Q1 and Q2 applied through
                         T4, AM filter, T1, and CR7.
                     7. ANT SW selects appropriate antenna.


NOTE:   QUESTION: What module provides side-tone in AM?
        ANSWER: Transmitter A1.

        QUESTION: What is the purpose of the SMO key in synthesizer A5 during AM
        transmit?
        ANSWER: Retunes synthesizer to the selected frequency.

        QUESTION: What module provides side-tone in FM?



                                                13
     ANSWER: Synthesizer A5.



5.   Learning Step / Activity 5. . Receiver Mode Signal Flow
            Method of Instruction:   Conference / Discussion
      Instructor to Student Ratio:   1:20
              Time of Instruction:   20 mins
                           Media:    Large Group Instruction

     NOTE: Show Slide 94E-E01-S10
     a. Received RF applied to transmitter A1.

          (1) Antenna switch selects AM or FM.
          (2) XMT KEY enables Q17 which provides a
               ground enabling receive.
          (3) RF routed thru antenna switch to RF
               receiver A4A2.

     b. RF receiver A4A2.

          (1) Tuning.

               (a) Frequency select information from A7
                    applied to tune volt generator circuits.
               (b) 100 MHz line applied to tune volt
                    generator circuits.
               (c) Output used to tune AM and FM
                     filters.

          (2) Band selection.

                (a) Two inputs to band select switches:

                          1. FM HI line.
                          2. 100 MHz line.

                 (b) FM HI line logic 1 if frequency
                      between 52 and 88 MHz.
                 (c) 100 MHz line logic 1 if selected
                       frequency is AM.
                 (d) Output used to select AM and FM
                       filters.

          (3) RF signal from A1 applied to appropriate
               filter.
          (4) AM or FM filter filters out all but
               selected frequency.
          (5) Output applied to mixer Q7.
          (6) RF injection from synthesizer A5 applied
               to Q7.
          (7) Synthesizer A5.

               (a) Provides receiver injection
                     frequency for AM and FM.
               (b) Injection frequency always offset


                                               14
              above selected frequency.
             1. AM injection frequency 25 MHz
                 above selected frequency.
             2. FM injection frequency 12 MHz
                 above selected frequency.

    (8) Mixer Q7 mixes both signals.
    (9) Output applied to filter/mixer in IF
           receiver A4A1.
    (10) AGC from IF receiver applied to AM/FM
           filters.

        NOTE: Show Slide 94E-E01-S11
c. IF receiver A4A1.

    (1) AM/FM switch U1.

        (a) 100 MHz line switches circuits from
             AM to FM.
        (b) BW cont selects WB filter or NB
             filter.
        (c) Switches SQ CONT to AM or FM.

    (2) AM mode.

        (a) RF filtered by FL2 and amplified by
              Q4.
        (b) Output of Q4 routed through WB/NB
              SW/FLTR to IF amplifier U2.
        (c) Mixer Q8 mixes 25 MHz signal from U2
              and 23.1 MHz from oscillator Y2, Q9.
        (d) 1.9 MHz output from Q8 applied to IF
              amplifier U3.
        (e) IF signal detected by AM detector
              U5A.
        (f) Audio from U5A sent to audio card A3
              and AGC amplifier U5D.
        (g) AGC applied to U3, Q8, U2, FL2, and
              Q4.
        (h) Signal of sufficient strength causes
              squelch override U6B to trigger
              squelch amplifier U6A.
        (i) U6A output applied to NB CONT
              circuit in A3.

    (3) FM mode.

        (a) RF from mixer A4A2Q7 filtered by
              FL1.
        (b) Q3 mixes 12 MHz from FL1 and 13 MHz
              from Q1, Q2, and Y1.
        (c) 25 MHz RF filtered by WB/NB SW/FLTR
              and amplified by U2.
        (d) Output from U2 mixed with 23.1 MHz
              from Y2 and Q9 in mixer Q8.
        (e) 1.9 MHz amplified by U3 and detected



                                       15
                       by FM detector/limiter U4, U5B.
                 (f) Audio output from U5B applied to
                      audio card A3 and squelch override U6B.
                 (g) Squelch operates the same in FM as
                       in AM.
                NOTE: Show Slide 94E-E01-S12

        d. Audio card A3.

            (1) 100 MHz line from A7 applied to U7A,
                 switching to AM or FM.
            (2) AM/FM audio applied to AM/FM switch U7A.
            (3) Audio applied through NB control switch
                 U7B and U7C.

                 (a) NB CONT switch allows NB audio
                      inputs through.
                 (b) NB CONT circuit controls NB CONT SW
                      U7B and U7C.
                 (c) Three inputs from A7 needed at NB
                      CONT circuit.

                      1. SMO lock synthesizer must be
                          locked on frequency.
                      2. SQ DIS squelch must be
                          disabled or preset level
                          exceeded.
                      3. INVALID band valid band
                          selected.

            (4) Audio filtered by band pass filter/amp.
            (5) Q1 and Q2 provides final amplification.
            (6) Output of audio applied to headphones.
            (7) Wideband mode.

                 (a) Output from U7A applied to U9D.
                 (b) Wideband amplifier provides output
                      to pin c of J1 in Xmode and U9B.
                 (c) ADF amplifier U9B output through pin
                      U of J1 to aircraft system.


NOTE:   QUESTION: What module is the received RF routed through before reaching A4A2?
        ANSWER: Transmitter A1.

        QUESTION: What is the receiver injection frequency for FM?
        ANSWER: 12 MHz above selected frequency.

        QUESTION: What is the receiver injection frequency for AM?
        ANSWER: 25 MHz above selected frequency.



6.      Learning Step / Activity 6. Power Supply A2
               Method of Instruction: Conference / Discussion
         Instructor to Student Ratio: 1:20


                                                 16
                 Time of Instruction: 5 mins
                              Media: Large Group Instruction

        NOTE: Show Slide 94E-E01-S13
        a. Provides RECEIVER-TRANSMITTER with all required voltages.

        b. Provides the following voltages:

             (1) + 80 V DC.
             (2) + 27 V DC.
             (3) 28 V DC.
             (4) + 12 V DC.
             (5) 12 V DC.
             (6) + 5 V DC filtered.
             (7) + 6.1 V DC. unfiltered


NOTE:   QUESTION: Where do all the required voltages for the radio originate?
        ANSWER: Power supply A2.

        QUESTION: How many different voltages does the A2 provide?
        ANSWER: Seven.



7.      Learning Step / Activity 7. Electrostatic Sensitive Devices (ESD)
               Method of Instruction:     Conference / Discussion
         Instructor to Student Ratio:     1:20
                 Time of Instruction:     30 mins
                              Media:      Large Group Instruction

        NOTE: Show Slide 94E-E01-S15
        a. General.

             (1) Many components of the receiver
                  transmitter are easily damaged by static
                  electricity.
             (2) Called electrostatic sensitive devices
                  (ESD).

        b. Using workstation.

             (1) Ground conductive work surface (1 mega ohm
                  table mat).
             (2) Repairer must wear a 1 mega ohm wrist strap
                  attached to table mat.
            (3) Repairer's feet should be on a conductive
                  floor mat that has a 1 mega ohm resistive
                  path to ground.




                                                    17
    (4) No two objects, including fingers, work
         bench, test equipment, or tools, should
         touch an ESD assembly at the same time
         unless the two objects have first been
         placed in electrical contact with one
         another.
    (5) Ground all tools that will come in
         contact with the receiver-transmitter.
         Contact with your hand for several
         seconds is sufficient.

       NOTE: Show Slide 94E-E01-S16
c. Identifying ESDs devices.

    (1) A black on yellow caution sticker on the
         part or assembly.
    (2) One of the caution stickers in the TM
         maintenance procedures or illustration.
    (3) The abbreviation ESD in the description
         column of the parts list.

      NOTE: Always check for ESDs before performing
               maintenance procedures.

d. Preventing damage to ESDs.

    (1) Use static workstation when working with
         ESDs.
    (2) Place equipment and tools on static
         workstation prior to removing ESDs.
    (3) Keep ESDs in antistatic bags when not in
         use.

e. Using static workstations.

    (1) Static workstation is designed to prevent
         buildup of static electricity.
    (2) Set up static workstation prior to
         removing covers from receiver-transmitter
         or removing ESDs from antistatic bag.
    (3) Keep receiver-transmitter to be repaired,
         ESD repair parts, and hand tools on mat.

f. Protective packaging for ESDs.

    (1) Antistatic bags are used for packaging
         ESDs.
    (2) ESDs must be kept in antistatic bags
          when not in use.
    (3) Ordinary plastic bags must not be used to
         package ESDs.




                                        18
             (4) To pack assemblies

                   (a) Connect static workstation.
                   (b) Connect wrist strap.
                   (c) Place antistatic bag on mat.
                   (d) Remove assembly from receiver
                          transmitter.
                   (e) Open antistatic bag.
                   (f) Slide assembly into antistatic bag.
                   (g) Close antistatic bag.

             (5) To unpack assemblies

                   (a) Connect static workstation.
                   (b) Connect wrist strap.
                   (c) Place antistatic bag on mat.
                   (d) Open antistatic bag.
                   (e) Slide assembly out of antistatic
                          bag.
                   (f) Install assembly into receiver-
                        transmitter.
                   (g) Put antistatic bag away until needed
                          again.


NOTE:   QUESTION: What are ESDs?
        ANSWER: : Electrostatic sensitive devices.

        QUESTION: How are ESDs damaged?
        ANSWER: By static electricity.

        QUESTION: What should be used whenever you are working on ESDs?
        ANSWER: Static workstation.



8.      Learning Step / Activity 8. Practical Exercise
               Method of Instruction:   Practical Exercise (Hands-on)
         Instructor to Student Ratio:   1:5
                 Time of Instruction:   11 hrs
                              Media:    ACTUAL EQUIPMENT



NOTE:   Conduct a check on learning and summarize the learning activity.


CHECK ON LEARNING: Conduct a check on learning and summarize the ELO.

B.      ENABLING LEARNING OBJECTIVE
         ACTION:            Demonstration: Equipment Set-up and Troubleshooting Procedures
         CONDITIONS:        In a contemporary operating environment, given a student handout
                            and the course orientation data in a controlled environment




                                                     19
         STANDARDS:       Troubleshoot IAW TM 11-5821-318-30



1.      Learning Step / Activity 1. Equipment Set-up/Troubleshooting Procedures
               Method of Instruction:   Demonstration
         Instructor to Student Ratio:   1:20
                 Time of Instruction:   2 hrs
                              Media:    Large Group Instruction

        Demonstrate test equipment setup and troubleshooting procedures
        IAW TM 11-5821-318-30.


NOTE:   Conduct a check on learning and summarize the learning activity.


CHECK ON LEARNING: Conduct a check on learning and summarize the ELO.

C.      ENABLING LEARNING OBJECTIVE
         ACTION:          Practical Exercise: Troubleshooting Procedures
         CONDITIONS:      In a contemporary operating environment, given a student handout
                          and the course orientation data in a controlled environment

         STANDARDS:       Troubleshoot IAW TM 11-5821-318-30



1.      Learning Step / Activity 1. PE1: Equipment Set-up/Troubleshooting
               Method of Instruction:   Practical Exercise (Hands-on)
         Instructor to Student Ratio:   1:5
                 Time of Instruction:   20 hrs
                              Media:    ACTUAL EQUIPMENT

        During this practical exercise, evaluate students
        on their ability to operate test equipment. Coach, if necessary.



NOTE:   Conduct a check on learning and summarize the learning activity.


CHECK ON LEARNING: Conduct a check on learning and summarize the ELO.

D.      ENABLING LEARNING OBJECTIVE
         ACTION:          Adjust RECEIVER-TRANSMITTER (RT-1354/ARC-186(V)
         CONDITIONS:      Given a maladjusted RT-1354/ARC-186(V), TM 11-5821-318-30.

         STANDARDS:       Adjust RT-1354/ARC-186(V) IAW TM 11-5821-318-30.




                                                  20
1.      Learning Step / Activity 1. Purpose of Adjustments
               Method of Instruction:   Conference / Discussion
         Instructor to Student Ratio:   1:20
                 Time of Instruction:   1 hr
                              Media:    Large Group Instruction

        a. Narrow band clipping A3R28 Used to set
            the audio level of narrow band operation.

        b. Wide band clipping A3R44 Used to set the
            audio level of wide band operation.

        c. FM deviation A5A3R18 Used to adjust the
            amount of FM transmit modulation (5 kHz).

        d. 150 Hz A3R55 Used to adjust the invalid band
            selection warning tone.

        e. AM modulation A1A3R66 Used to set the
            correct percentage of AM output modulation (80
            percent).

        f. Side-tone A3R21 Used to set the correct
           level of audio heard in the headset while
           transmitting.

        g. Voice audio A3R80 Used to set the received
            audio levels (AM and FM).

        h. FM low band power A1A3R56 Used to set the
            correct power out level.

        i. FM high band power A1A3R57 Used to set the
            correct power out level.

        j. AM power A1A3R58 Used to set the correct
            power out level.

        k. AM squelch Used to set AM receiver sensitivity.

        l. FM squelch Used to set FM receiver sensitivity.


NOTE:   Conduct a check on learning and summarize the learning activity.

2.      Learning Step / Activity 2. Demonstration
               Method of Instruction:   Conference / Discussion
         Instructor to Student Ratio:   1:20
                 Time of Instruction:   1 hr
                              Media:    Large Group Instruction

        Demonstrate test equipment setup and the procedures for performing
        adjustments IAW TM 11-5821-318-30.




                                                    21
NOTE:   Conduct a check on learning and summarize the learning activity.

3.      Learning Step / Activity 3. Practical Exercise
               Method of Instruction:      Practical Exercise (Hands-on)
         Instructor to Student Ratio:      1:5
                 Time of Instruction:      10 hrs
                              Media:       ACTUAL EQUIPMENT

        During this practical exercise, evaluate the students on their ability
        to operate the test equipment. Coach, if necessary.


NOTE:   Conduct a check on learning and summarize the learning activity.


CHECK ON LEARNING: Conduct a check on learning and summarize the ELO.

E.      ENABLING LEARNING OBJECTIVE
         ACTION:             Identify AN/ARC-231 main LRU's
         CONDITIONS:         Given a AN/ARC-231, MX-64-64-405.

         STANDARDS:          Successfully identify main LRU’s of the AN/ARC-231.



1.      Learning Step / Activity 1. Radio Set Purpose
               Method of Instruction:      Conference / Discussion
         Instructor to Student Ratio:      1:20
                 Time of Instruction:      1 hr
                              Media:       Large Group Instruction

                 Purpose.

                              This System supports DoD requirements for airborne, multi-band,
                              multi-mission, secure anti-jam voice, data and imagery
                              transmission and provides network capable communications in an
                              compact radio set.


NOTE:   Conduct a check on learning and summarize the learning activity.

2.      Learning Step / Activity 2.
               Method of Instruction:      Conference / Discussion
         Instructor to Student Ratio:      1:20
                 Time of Instruction:      30 mins
                              Media:       Large Group Instruction

        NOTE:      Show Slide 94E-E01-S17


                    a. Major components.


                                                        22
                    (1) Radio RT-1808A/ARC-213(V)(C)
                    (2) Remote Control Indicator C-12601
                    (3) Fill Panel C-12608
                    (4) High Power Amplifier AM-7565
                    (5) Preamplifier AM-7566 which interfaces to a single element SATCOM
        antenna
                    (6) Preamplifier AM-7529 which interfaces to a dual element SATCOM
        antenna

                    b. Radio set performance data

                     (1) Frequency range

                          (a) Operates from 30 to 512 MHz, AM/FM LOS (Line-of-Sight) with
                               frequency agile modes (ECCM)
                          (b) UHF SATCOM (Satellite Communications)
                           ( c) DAMA (Demand Assigned Multiple Access)
                                 ( d) ATC (Air Traffic Control) channel spacing is operator
                  selectable in 5, 8.33, 12.5, and 25kHz steps


NOTE:   Conduct a check on learning and summarize the learning activity.


CHECK ON LEARNING: Conduct a check on learning and summarize the ELO.




                                                    23
SECTION IV.   SUMMARY


              Method of Instruction:     Conference / Discussion
              Instructor to Student Ratio is:   1:20
              Time of Instruction: 5 mins
              Media:      Large Group Instruction

Check on       Determine if the students have learned the material presented by soliciting student
Learning       questions and explanations. Ask the students questions and correct
               misunderstandings.

Review /       During this block of instruction, you have learned to troubleshoot the
Summarize      RT-1354/ARC-186(V). This knowledge will be invaluable to you when you are in
Lesson         the field working as a 94E Radio repairer.




                                                24
SECTION V.     STUDENT EVALUATION

Testing         NOTE: Describe how the student must demonstrate accomplishment of the TLO. Refer
Requirements    student to the Student Evaluation Plan.



Feedback        NOTE: Feedback is essential to effective learning. Schedule and provide feedback on the
Requirements    evaluation and any information to help answer students' questions about the test. Provide
                remedial training as needed.




                                                    25
Appendix A - Viewgraph Masters (N/A)




                A-1
Appendix B - Test(s) and Test Solution(s) (N/A)




                     B-1
                           Appendix C - Practical Exercises and Solutions

         PRACTICAL EXERCISE(S)/SOLUTION(S) FOR LESSON 1: 94E10E01 version FG2

                            PRACTICAL EXERCISE SHEET 94L10C01LP1

Title            REPAIR RECEIVER-TRANSMITTER RT-(*)/ARC-186(V), MOPP 4 TRAINING

Lesson Number    94E10E01 version FG2 / Repair Receiver-Transmitter RT-(*)/ARC-186(V)
/ Title

Introduction

Motivator        One of the newest radios in the 94L field is the AN/ARC-186(V). This radio combines
                 both AM and FM capabilities. During this lesson, you will learn the function and
                 operation of the RT-1354/ARC-186(V) along with the capability to troubleshoot it.

Terminal         NOTE: The instructor should inform the students of the following Terminal Learning Objective
Learning         covered by this practical exercise.
Objective
                 At the completion of this lesson, you [the student] will:
                      Action: Repair RT-1354/ARC-186(V)
                 Conditions:
                                 Given a defective RT-1354/ARC-186(V), applicable test equipment,
                                 and TM 11-5821-318-30.
                 Standards:
                                 The student must isolate two out of three defective modules within 45
                                 minutes per problem IAW TM 11-5821-318-30.

Safety
                 Remove watches, rings, and other metallic objects from hands and around the neck.
Requirements
                 When making test measurements on live voltage circuits in equipment, keep one
                 hand in your pocket.

                 Know the use and location of power switches, circuit breakers, power cutoff devices,
                 before commencing work on equipment.

                 Never engage in horseplay around powered circuits.

                 Maintain an alert professional bearing while working with electrical power/circuits
                 and observe ALL SAFETY PRECAUTIONS.

Risk             Low
Assessment

Environmental
Considerations

Evaluation       STUDENT CERTIFICATION IS BASED ON SUCCESSFULLY UNDERSTANDING
                 OF ALL MATERIAL COVERED IN THIS LESSON PLAN.

Instructional
Lead-In

Resource         Instructor Materials:




                                                       C-1
Requirements      All lesson plans
                  b. Diagram Booklet
                  c. Operational Test Booklet
                  d. Information Booklet
                  e. Required TMs
                  f. Electronic Media


                  Student Materials:
                  . Work Book
                  b. Diagram Booklet
                  c. Operational Test Booklet
                  d. Information Booklet
                  e. Required TMs

Special
Instructions

Procedures
            PRACTICAL EXERCISE(S)/SOLUTION(S) FOR LESSON 1: 94L10C01 version 1

                             PRACTICAL EXERCISE SHEET 94L10C01001

Title             REPAIR RECEIVER-TRANSMITTER RT-(*)/ARC-186(V), MOPP 4 TRAINING

Lesson Number     94L10C01 version 1 / REPAIR RECEIVER-TRANSMITTER RT-(*)/ARC-186(V),
/ Title           MOPP 4 TRAINING

Introduction

Motivator         One of the newest radios in the 94L field is Time the AN/ARC-186(V). This radio
                  combines both AM and FM capabilities. During this lesson, you will learn the
                  function and operation of the RT-1354/ARC-186(V) along with the capability to
                  troubleshoot it.

Terminal          NOTE: The instructor should inform the students of the following Terminal Learning Objective
Learning          covered by this practical exercise.
Objective
                  At the completion of this lesson, you [the student] will:
                       Action: 093-94L-1302 / REPAIR RECEIVER-TRANSMITTER
                                 RT-(*)/ARC-186(V)
                  Conditions:    Given a defective RT-1354/ARC-186(V), applicable test equipment,
                                 and TM 11-5821-318-30.
                  Standards:     The student must isolate two out of three defective modules within 45
                                 minutes per problem IAW TM 11-5821-318-30.

Safety
                  Remove watches, rings, and other metallic objects from hands and around the neck.
Requirements
                  When making test measurements on live voltage circuits in equipment, keep one
                  hand in your pocket.

                  Know the use and location of power switches, circuit breakers, power cutoff devices,
                  before commencing work on equipment.




                                                      C-2
                 Never engage in horseplay around powered circuits.

                 Maintain an alert professional bearing while working with electrical power/circuits
                 and observe ALL SAFETY PRECAUTIONS.

Risk             Low - LOW, IV-E
Assessment

Environmental    None
Considerations

Evaluation

Instructional
Lead-In

Resource         Instructor Materials:
Requirements
                 Student Materials:


Special
Instructions

Procedures




Feedback
Requirements




                                                  C-3
                            PRACTICAL EXERCISE SHEET 94L10C01002

Title            REPAIR RECEIVER-TRANSMITTER RT-(*)/ARC-186(V), MOPP 4 TRAINING

Lesson Number    94L10C01 version 1 / REPAIR RECEIVER-TRANSMITTER RT-(*)/ARC-186(V),
/ Title          MOPP 4 TRAINING

Introduction

Motivator        One of the newest radios in the 94L field is the AN/ARC-186(V). This radio combines
                 both AM and FM capabilities. During this lesson, you will learn the function and
                 operation of the RT-1354/ARC-186(V) along with the capability to troubleshoot it.

Terminal         NOTE: The instructor should inform the students of the following Terminal Learning Objective
Learning         covered by this practical exercise.
Objective
                 At the completion of this lesson, you [the student] will:
                      Action: 093-94L-1302 / REPAIR RECEIVER-TRANSMITTER
                                RT-(*)/ARC-186(V)
                 Conditions:    Given a defective RT-1354/ARC-186(V), applicable test equipment,
                                and TM 11-5821-318-30.
                 Standards:     The student must isolate two out of three defective modules within 45
                                minutes per problem IAW TM 11-5821-318-30.

Safety
                 Remove watches, rings, and other metallic objects from hands and around the neck.
Requirements
                 When making test measurements on live voltage circuits in equipment, keep one
                 hand in your pocket.

                 Know the use and location of power switches, circuit breakers, power cutoff devices,
                 before commencing work on equipment.

                 Never engage in horseplay around powered circuits.

                 Maintain an alert professional bearing while working with electrical power/circuits
                 and observe ALL SAFETY PRECAUTIONS.

Risk             Low - LOW, IV-E
Assessment

Environmental    None
Considerations

Evaluation

Instructional
Lead-In

Resource         Instructor Materials:
Requirements



                 Student Materials:




                                                     C-4
Special
Instructions

Procedures
a. Explanation to students.

    (1) During this practical exercise, you will
         practice performing troubleshooting
         procedures that will enable you to
         isolate faults within the RT1354/
         ARC-186(V) IAW TM 11-5821-318-30.
    (2) Observe both personal and equipment
         safety at all times.
    (3) Perform the test procedures to ensure
         proper operation.
    (4) After everyone has performed the test
         procedures, the instructor will insert
         faults.
    (5) Perform the test procedures and use the
         appropriate troubleshooting procedures to
         isolate the fault.
    (6) Clean your position upon completion of
         troubleshooting.

b. Application by students.

    (1) Connect test equipment
    (2) Warm up equipment.
    (3) Perform test procedures.
    (4) Instructor inserts faults.
    (5) Perform troubleshooting procedure to
          isolate fault.
    (6) Clean position.

c. Evaluation.

    During the practical exercise,
    evaluate students to ensure that they have
    the ability to isolate faults in the
    RT1354/ARC186(V) IAW TM 11-5821-318-30.


Feedback
Requirements




                                                     C-5
                            PRACTICAL EXERCISE SHEET 94L10C01003

Title            REPAIR RECEIVER-TRANSMITTER RT-(*)/ARC-186(V), MOPP 4 TRAINING

Lesson Number    94L10C01 version 1 / REPAIR RECEIVER-TRANSMITTER RT-(*)/ARC-186(V),
/ Title          MOPP 4 TRAINING

Introduction

Motivator        One of the newest radios in the 94L field is the AN/ARC-186(V). This radio combines
                 both AM and FM capabilities. During this lesson, you will learn the function and
                 operation of the RT-1354/ARC-186(V) along with the capability to troubleshoot it.

Terminal         NOTE: The instructor should inform the students of the following Terminal Learning Objective
Learning         covered by this practical exercise.
Objective
                 At the completion of this lesson, you [the student] will:
                      Action: 093-94L-1302 / REPAIR RECEIVER-TRANSMITTER
                                RT-(*)/ARC-186(V)
                 Conditions:    Given a defective RT-1354/ARC-186(V), applicable test equipment,
                                and TM 11-5821-318-30.
                 Standards:     The student must isolate two out of three defective modules within 45
                                minutes per problem IAW TM 11-5821-318-30.

Safety
                 Remove watches, rings, and other metallic objects from hands and around the neck.
Requirements
                 When making test measurements on live voltage circuits in equipment, keep one
                 hand in your pocket.

                 Know the use and location of power switches, circuit breakers, power cutoff devices,
                 before commencing work on equipment.

                 Never engage in horseplay around powered circuits.

                 Maintain an alert professional bearing while working with electrical power/circuits
                 and observe ALL SAFETY PRECAUTIONS.

Risk             Low - LOW, IV-E
Assessment

Environmental    None
Considerations

Evaluation

Instructional
Lead-In

Resource         Instructor Materials:
Requirements



                 Student Materials:




                                                     C-6
Special
Instructions

Procedures
a. Explanation to students.

     (1) During this practical exercise, you will
           practice performing adjustment procedures
           IAW TM 11-5821-318-30.
     (2) Observe both personal and equipment
           safety at all times.
     (3) Perform an operational test on the
           RT1354 to ensure proper operation.
     (4) If your set is operating properly, ask
           your instructor to maladjust your RT.
     (5) Perform the operational test and use the
           appropriate adjustment procedures.
     (6) Clean your position upon completion of
           adjusting the RT.

b. Application by students.

     (1) Connect test equipment.
     (2) Warm up equipment.
     (3) Perform operational test.
     (4) Request a maladjustment.
     (5) Perform adjustment procedures.
     (6) Clean position.

c. Evaluation.

During the practical exercise, evaluate students to ensure that they
have the ability to adjust the RT1354/ARC-186(V)
IAW TM 11-5821-318-30.


Feedback
Requirements




                                                          C-7
               Appendix D - Student Handouts (N/A)



Feedback
Requirements




                               C-8
Appendix D - Student Handouts (N/A)




                D-1

				
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