DSS5800 Automatic Drive Test System with 8VSB Decoding by oym20829


									Z Technology, Inc.
     DSS5800 Automatic Drive Test System with 8VSB Decoding
                                                           Comprehensive Field Measurement
                                                           and Documentation System for the
                                                           DTV (8VSB) Digital Television Stan-
                                                           Self-Contained and Convenient to
                                                           Operate in a Portable or Mobile
                                                           Incorporates Swept Spectrum Field
                                                           Strength Meter & 8VSB Decoder
                                                           Controlled via laptop PC
                                                           Graphic Displays of RF Spectrum
                                                           and Decoded Tap Energy
                                                           Records Numerical Values for Total
                                                           In-Channel Power, Peak Power,
                                                           Bandpass Tilt, In-Band Notches,
        DSS5800 DTV Measurement System                     Total Tap Energy, SNR and SER
Windows Based Digital Television Signal                    Rugged Design Provides Maximum
Analysis System with 8VSB Decoding                         Portability and Capabilities for
                                                           Acquiring Data from Difcult to
The DSS5800 is a DTV (8VSB) portable Terrestrial
                                                           reach Locations
Broadcast Measurement System. The unit is a self           Also Measures Existing Analog
contained system incorporating a laptop PC running
                                                           NTSC Signal Coverage
proprietary Z Technology Drive Test Application
Software.                                                  Precision Measurements:
The System features RF field strength and Digital          The DSS5800 is a unique turnkey system built
Television (DTV) decoded parameter measurements            for automatic data measurement, collection,
while adding unique plotting and mapping capabilities.     storage and presentation. Parameters are
Using this Windows based system, a Broadcaster             continuously measured and stored in data
can easily generate signal coverage data including         files. During data capture, as well as at a
a full set of gure-of-merit parameters for DTV            later time, parameters can be plotted in
signals and plot these over a service area. Problems       color over maps of coverage areas. Plots
may be analyzed quickly to determine appropriate           and collected data are both available for
corrective action for improved signal coverage.            analysis, print out and export to other programs.

The DSS5800 provides all the capability of an RF Signal    The system takes advantage of the precision
Level Measurement System with the added advantage          and exibility of Z Technology’s eld strength
of 8VSB Digital Television Signal Decoding. Extensive      meter technology to provide accurate, high-
RF and 8VSB decoded parameter measurement                  speed signal strength measurements under
capability is contained within this one compact, easy to   PC control. When used with an optional
use package. The System is made up of precision            calibrated antenna, the DSS5800 provides a
RF measuring hardware, an 8VSB decoder, GPS                comprehensive facility for NIST traceable RF
receiver, a Windows based laptop PC, and Z Tech-           power measurement and documentation of
nology Drive Test Application Software. It is a            digital or analog signal coverage.
compact suitcase sized system to allow use in the
laboratory and also in portable or mobile environments.    In addition to RF measurements, the DSS5800
provides 8VSB decoder signal analysis of demodu-
lated parameters necessary to fully characterize
a DTV signal. Several decoder figure-of-merit
parameters are captured, measured and recorded
during a data collection session.
This Digital Signal Analysis System includes the
factory installed Drive-Test Automated Measure-
ment Program. This Application is a Windows based
program that uniquely integrates three separate yet
related features: Data Collection, Dot Plotting, and
Swept Display Analysis.
Data Collection:
The Data Tab is the control center of the Drive Test
Application. From this screen location, recording
sessions (or Jobs) are initiated. Recorded data can
                                                        DSS5800 Data-Tab Display of Acquired Data includ-
be viewed during operation and the status of the
                                                         ing Latest Recorded information from all devices
subsystems within the DSS5800 is constantly visible
allowing review of proper operation.
Data Collection automates the process of logging         all during the same Drive Test. One or many DTV
against GPS locations and records several precise        and/or Analog television signals may be measured
RF characteristics including eld strength measure-      during one session. This is an invaluable tool when
ments and RF gure-of-merit parameters. These            working in today’s mixed analog and digital signal
include peak signal power, integrated power, band        environments.
pass tilt, signal notches and standard deviation of
the in-band power. In addition to RF characteristics,    Dot Plotting:
the DSS5800 also records 8VSB specic decoded            The Plot Tab of the Drive Test Software is used to
parameters into data collection files. Important         display plots and maps of test results during or after
and useful parameters recorded include Tap               a Drive Test session has occurred.
Energy, Segment Error Rate, Signal to Noise Ratio,       Live plotting of GPS determined positions can be
Sync Lock, Equalizer Lock, and Main Tap Energy           viewed while testing is in process and for many
Amplitude. These gures-of-merit are invaluable          locations can be overlaid on maps. Upon completion
when determining DTV signal coverage.                    of the rst segment of a drive test, the software
A Job is rst dened using the straight forward          automatically assigns colors to the dot trail of a driven
“Create Job” tool. The Data Collection application       path where colors correspond to signal strength,
can then be started before the vehicle is placed         or any one selected RF or Decoded figures-of-
in motion. The system will initialize and begin          merit. The operator can customize colors and color
accumulating data without further attention.             transition points to best highlight acceptable versus
                                                         insufcient measurement results.
If desired, data for DTV and Analog television
signals can be measured and stored in data les          During a Drive test, GPS plots can be viewed based
                                                         on different operator criteria. The operator can zoom
                                                         in or out as necessary to properly evaluate signal
                                                         parameters being displayed in color all during an
                                                         active measurement test sequence.
                                                         Mapping Options
                                                         Z Technology provides Drive-Test System operators
                                                         with several “real-time” as well as “post-
                                                         measurement” mapping choices. Real-time maps
                                                         are visible during an active measurement sequence,
                                                         with critical information appearing on the map as
                                                         measurements are being made. Real-time maps
                                                         become visible by selecting the Plot Tab within
                                                         the Drive Test. These maps remain active on the
                                                         screen while collecting measured data. Colored
           SURVEY map plot of a Drive Test               dots indicating GPS locations appear on “real-time”
                          DSS5800 DTV Signal Analysis System with 8VSB Decoding.
                         System shown being used in the eld in a portable application.
maps as an operator moves from place to place and            Drive Test. Contact a Z Technology authorized Distributor
measures signal parameters.                                  or the Factory for implementation details.

Depending on location in the USA, Europe or other            In addition to the above real-time maps, some users
countries throughout the world, users will nd Real-         may find extra mapping details are still desired.
time maps provide varying levels of country and/or           When added detail such as local streets, street & city
provincial borders and road level data. The USA              names or other terrain characteristics are important, Z
and Europe have the most detailed information on             Technology offers several post-measurement mapping
real-time maps including expressways, highways               options. Post-measurement mapping involves two
and major arterial roads. Other countries may have           steps. First export the measurement data from the
less detail.                                                 Drive Test Native format to a format compatible with
                                                             vendors such as Delorme Street Atlas TM or Microsoft
Note: Users can also add real-time map data to their         MapPoint TM . Second import these files into the
Drive Test Systems. Most countries have local map            chosen map application. When the appropriate option
data providers who offer this service at varying levels      is purchased, Z Technology will congure Drive Test to
of detail and at various pricing options. Z Technology       enable the user to seamlessly move into the chosen
provides detailed information concerning directory           post-measurement mapping applications.
structures within Drive Test used to store locally
purchased map data. Data must be provided in                 By taking advantage of real-time and post-
specic vendor formats and le structures.                   measurement mapping options, a Drive-Test operator
                                                             is provided with a complete set of mapping capabilities
Data must be provided in compatible ESRI TM le and
format standards. Several other requirements must be met     all in one integral System. Choose the proper mapping
in order for local data to be effectively displayed within   Option(s) to the DSS5800 that best suits your

               Microsoft Map Point™                                            Delorme Street Atlas™
             See Option MA04 and MA05                                            See Option MA03
Swept Display Analysis:
The Swept Display feature of the DSS5800
System provides active signal analysis, RF and
Decoded parameter review, and continuous
monitoring of data being captured for storage
to data files. It is a very useful and active
presentation of both the received RF Spectrum
and the 8VSB Decoded measurements such
as Tap Energy being generated from real-world
multipath effects.
The Swept Spectrum portion of the Drive Test
System is at the heart of RF signal measure-
ments for the DSS5800. The System utilizes
this swept mode of operation to generate the        DSS5800 Swept Display offers off-air analysis
frequency-vs-magnitude signal plot and then          of both RF Spectrum & Decoded Parameters
mathematically calculates various DTV RF
parameters of interest. Under control of the       8VSB decoded quality of all off-air DTV signals
system PC, the DSS5800 can measure and             within a service area.
display total 6MHz integrated power, peak in-      Summary:
band power, band pass tilt and signal notches.     Data can now be collected in a truly mobile
These RF parameters are the same ones that         environment during a Drive Test. If desired, data
can be plotted against GPS locations via the       can also be collected through a carefully planned
mapping capability of the System Software.         methodology determined by the operator. The
                                                   Data Collection Software allows a user to drive to
The Swept Spectrum Analysis portion of the
                                                   a specic known location, make a select number
system can be used to display a live spectrum
                                                   of measurements of all the chosen frequencies,
of signals under test. The user may view
                                                   pause the Drive Test System and move to the
this portion of the application at any time. A
                                                   next location of interest. This process can be
measurement sequence can also be paused
                                                   repeated as many times as is needed to capture
for the operator to use the Spectrum Display
                                                   and characterize signal coverage. In this way
capability for a quick look at adjacent channel
                                                   measurements can be recorded only at desired
interfering signals and relative power levels of
                                                   reference locations. Data les generated using
nearby stations. Upon completing this task, the
                                                   this method will contain exclusive information only
user simply resumes data collection. All this is
                                                   for the desired geographic positions.
possible within the Drive Test System.
                                                   Screen captures of any display within the Drive
Just below the RF monitoring area of the Swept     Test Application can easily be recorded and
Mode Display is the screen portion showing         stored for review or for use as printouts and in
activity from the 8VSB Decoder. All on-going       presentations. Creating a screen image is as
demodulated figure-of-merit parameters are         simple as selecting the “Capture Screen” Button
displayed here. Each parameter has a specic       provided on screen.
location where it is reported on-screen and
updated to the latest value.                       The new DSS5800 combines the functions of
                                                   off-air eld strength metering, accurate RF signal
The center of this area displays an active graph   strength measurement, 8VSB Digital decoded
of Tap Energy versus signal path length (in        signal characterization, GPS position identication,
usec). This display is invaluable for analyzing    and PC based automatic data collection & storage
multipath events and their effects on signal       in one convenient lightweight system. Its small size
reception.                                         permits transport as hand-carry airline baggage,
The Swept Display mode of Drive Test has           easy temporary installation in a vehicle, quick setup
many uses. It can be utilized as an independent    at eld locations, and portability to characterize RF
visual tool to characterize the RF spectrum and    and Digital signals at remote sites.
DSS5800 Drive Test System Specications:
 DTV (8-VSB) Terrestrial TV Broadcast Measurement                                               signal 2x IF BW away from center frequency
 System is a Windows based system housed in                                                     Third Order Intercept: Preamp ON typ. 0 dBm
 a compact suitcase sized package. The system                                                                          Preamp OFF typ. +20 dBm
 provides all the capability of an RF Drive Test
 Signal Level Measurement System with the addi-                                                 Noise Figure: Preamplier NF = 7 dB typical when RF
 tion of 8-VSB Digital Television Signal Decoding.                                              AMP is selected.
 The DSS5800 offers extensive RF and 8-VSB
 decoded parameter measurement capability.                                                      Audio Detection: AM or FM to internal speaker selected
                                                                                                from front panel Sensitivity
 The DSS5800 is designed for automatic data mea-                                                FM detection: 1 mV for 12 dB SINAD typical
 surement, collection and storage. Parameters are                                               AM detection: 1 mV for 12 dB S/N typical
 stored in open format comma delimited data les.
 Data can be plotted in color over maps of coverage                                             System Measurement Resolution: 0.1dB
 areas. Collected data is available for analysis, print                                         Output Linearity Range:
 out and easy export to several other programs.                                                 Continuous measurement range of 80 dB in auto-rang-
                                                                                                ing mode
SYSTEM RF SPECIFICATIONS                                                                         IF Bandwidth:     Narrowband = 15 KHz
Frequency Range: Coverage of all VHF & UHF                                                                         Wideband = 150 KHz
             System M Television Channels (2-69)                                                Input Impedance: 50 Ohm
Extended coverage: 5 -1000 MHz contiguous coverage
                with minimum step size of 1KHz                                                  DECODER SYSTEM SPECIFICATIONS
                                                                                                Class of Decoder:          8-VSB
Measurement Range: -10 dBuV to + 90 dBuV (-117                                                  Decoder Description: The Decoder Module is an
dBm to -17 dBm) using 4 internal Attenuation Ranges                                             ATSC compliant demodulator with forward error cor-
& 1 Preamp Range                                                                                rection decoder and concatenated trellis (Viterbi)/Reed-
                                                                                                Solomon decoder with deinterleaver/de-randomizer.
Measurement Accuracy: +/-2 dB @ 25 degrees +/- 10                                               Decoder features 6 MHz wide IF bandwidth
degrees C. in Field Strength Meter Mode                                                         Square-Root Raised-Cosine lter
Typical in Sweep Modes & for temp. range of 0 to 50                                             Fully internal carrier recovery loop
degrees C.                                                                                      Fully internal symbol timing recovery with programma-
Some modulation types inuence measurement accu-                                                ble loop lters
racy. For analog video modulation, the signal level of                                          Adaptive Equalization, including feed forward and feed-
the Vertical Sync Peak is measured. This adds 0.5dB                                             back sections (DFE structure)
additional uncertainty, widening the above specication                                         Range of -2.3 uS to +22.5 uS by default.
to +/- 2.5dB.                                                                                   User extendable to -2.3 uS to +80uS.
Power Readout Capability: dBm, dBuV or dBuV/Meter                                               Adaptation based on ATSC eld sync (trained) and/or
 (dBuV/M reading requires optional calibrated antenna)                                          8-VSB data (blind). Equalizer Taps: 900 Total Taps
                                                                                                25 Pre-Taps Represent -2.3329375uS
RF Signal Parameters Measurements and Storage                                                   874 Post-Taps Represent + 80.28072uS
Parameters Measured & Recorded to data les (Band-
pass settable from 1 -- 8 MHz):                                                                 Decoder Signal Parameter Measurements and Storage
        1) Total Integrated Power                                                               Parameters Measured & Recorded to Data Files :
        2) Peak Power                                                                            1)Sync Lock (True/False)
        3) In-Band Tilt                                                                          2)Equalizer Lock (True/False)
        4) In-Band Notches(Hi-Lo Diff)                                                           3) Main Tap Energy
        5)In-Band Std Deviation of Power                                                         4) Total Tap Energy outside Main Tap (dB)
                                                                                                 5) Signal to Noise Ratio before correction (SNR)
Decoded Signals Measured & Recorded to Data Files:                                               6) Segment Error Rate (SER)
See Decoder Section Below                                                                        7) Mean Square Error out of Equalizer (MSE)
Image Rejection: 60 dB typical, High Sensitivity mode
                                                                                                Forward Error Correction:
Detuning Characteristics: 40 dB typical; for undesired                                          Trellis (Viterbi) decoder Rate 2/3 (Rate 1/2 Ungerboeck
                                                                                                code based) (207, 187, T=10)

 Z Technology, Inc.
                                                                                                                 14950 NW Greenbrier Parkway
 This product is manufactured in the USA by Z Technology, Inc., and caries a 1 year warranty.
                     For additional information please contact the factory.                                     Beaverton, OR 97006-7368 USA
                                                                                                           Ph: 503-614-9800, FAX 503-614-9898
 DSS5800 040609 10000 Data subject to change without notice
DSS5800 Drive Test System Specications(Cont.)
Reed-Solomon code Internal convolutional de-inter-                                        DGPS accuracy Position: 2 m CEP (50%)
leaving (I = 52; using internal memory)                                                   Velocity:
External indication of uncorrectable error (Transport                                     Velocity: 0.05 m/sec
Error Indicator bit in MPEG packet header is also set)                                    Acquisition (typical)
De-randomizer based on ATSC standard NTSC co-                                             Cold start: <130 seconds(90%)
channel interference lter NTSC co-channel interfer-                                      Warm start: <45 seconds(90%)
ence technology with low noise penalty                                                    Hot start: <20 seconds(90%)
                                                                                          Cold start requires no initialization.
APPLICATIONS SOFTWARE, DATA STORAGE &                                                     Warm start implies last position; time and almanac
DATA FORMATS                                                                              are saved by back-up power. Hot start implies
Applications Software: Windows 95/98/XP based                                             ephemeris also saved.
Automated Drive Test Measurement Software includes
the following                                                                             Reacquisition after signal loss < 2 seconds (90%)
 1) Data Collection: Provides for orderly collection                                      GPS antenna
 and storage of RF and Decoded Figures-of-Merit                                           Compact, active micropatch antenna with 5-meter
 Parameters outlined in the above sections.                                               cable & mag. mount. 1.60” x 1.90” x 0.55” high
                                                                                          (40.6mm x 48.3mm x 13.9mm)
 2) Dot Plotting/Mapping: Allows GPS locations to be
 plotted and viewed during and after testing. Colors                                     COMPUTER
 are assigned to the dot trail of the driven path and                                    Laptop Computer: Windows OS, Speed of 600 MHz
 indicate range of parameter. Colors correspond to                                       or better and at least 64 Mb Memory
 any one (1) selected RF or Decoded Figures-of-
 Merit Parameters.                                                                       SYSTEM PHYSICAL SPECIFICATIONS
 3) Sweep Analysis: Displays                                                             System Power Requirements: 12VDC at 3.5AMP
 a) Swept frequency spans: 5MHz, 10MHz & 20MHz                                                                       or 120/220VAC
 RF Parameters calibrated in 10MHz & 20MHz (150KHz BW) Power Inverter: 12V DC input
 Acquisition Sweep Rates in these two modes:
  550msec per sweep                                                    120V AC output, 150 watts
 Sweep refresh rate depends on Decoder settings        Certications: UL CSA
 b) Tap Energy Plot (Echo Prole):
 All measured RF & Decoded Figures-of-Merit Param- System Dimensions:
 eters are displayed for users review and analysis.               216 mm (8.5 in) High
                                                                  375 mm(14.75 in)Deep
 Data Storage: Data Stored on PC Hard Drive under                 470 mm (18.5 in) Wide
 open folder and le hierarchy                             System Weight 13.9 Kg (29 lbs.)
 Data Format: Format is comma delimited nonpropri- System Operating Temp: +10 to +40 Deg. C
 etary les accessible for importing into other standard
 utilities. Data recorded into les include: date, time,   Options:
                                                           MD 01 Real-Time North American Map Data
 freq, latitude, longitude, elevation, speed, power, inte- MD 02 Real-Time European Map Data
 grated power, peak power, tilt, high-low diff., std. dev, MA 03 Post-Measurement Delorme Street Atlas USA™
 tap energy, main tap, SNR(dB), MSE, SER, Sync             MA 04 Post-Measurement Microsoft MapPoint ™ USA
                                                           MA 05 Post-Measurement Microsoft MapPoint ™ Europe
 Lock, EQ Lock.                                            MA 06 Post-Measurement Custom Mapping

                                                    AA1-B1:     Calibrated tuned dipole antenna 30 - 70 MHz
 General Description: L1 frequency, C/A code (SPS), AA1-B2:     Calibrated tuned dipole antenna 65 - 180 MHz
 8-channel continuous tracking receiver,            AA1-B3:     Calibrated tuned dipole antenna 170 - 340MHz
 32 correlators                                     AA1-B4:     Calibrated tuned dipole antenna 325 - 1000 MHz
                                                    AA-TV SET: Calibrated tuned dipole antenna Set 57 - 806 MHz
 Antenna Connector: SMB
 Update rate:            1Hz                        AA-3 Biconical antenna system 20 MHz - 330 MHz
 Accuracy:                                          AA-4 Log Periodic antenna system 290 MHz - 1000 MHz
                                                    AA-6 Log Periodic antenna system 150 MHz - 1000 MHz
 Position & Velocity: 25 m CEP (50%) & 0.1 m/sec    AA-7 Bi-Log Periodic antenna system 25 MHz - 1000 MHz
 (without S/A)
 Time: 95 nanoseconds RMS (over-determined clock

     Z Technology, Inc.
                                                                                                                 14950 NW Greenbrier Parkway
      This product is manufactured in the USA by Z Technology, Inc., and caries a 1 year warranty.
                          For additional information please contact the factory.                                Beaverton, OR 97006-7368 USA
                                                                                                           Ph: 503-614-9800, FAX 503-614-9898
     DSS5800 040609 10000 Data subject to change without notice

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