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

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

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