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FAA20 Embedded NEXCOM Vocoder
Board Manual
This manual has been prepared for the Federal Aviation Administration.
FA100-00107 (March 2004) – Rev 1.0.0 Page 95
8.3.30 TEST
The TEST command is used to access test/integration tools, signal
processing functions, and built-in hardware test functions. Test/integration
tools include a COM3 monitor, port test pattern controls, and a vocoder bit
exactness test mode. The signal processing functions include a tone
detector and a coarse spectrum analyzer. These signal processing
functions are ‘connected’ to the COM port of the linear mixer, thus any
signal to be evaluated must be mixed into this port. Hardware test
functions are used at the factory and require a special external loop back
adapter.
The command syntax for all test functions is provided below. For
operational details, see Section 7.2.
Table 41: TEST Command Syntax
ATTRIBUTE DESCRIPTION
SYNTAX TEST [param [onstate]] Test/Integration Tools
TEST TRIG [noff toff] Test/Integration Tool
TEST FFT [uopt] Signal Processing Function
TEST SWEEP [uopt] Signal Processing Function
TEST CALRX Signal Processing Function
TEST TONDET Signal Processing Function
TEST htest [hopt] Hardware Test Functions
param Test Parameters .
BITEXACT= Bit Exact Test Mode (supports vocoder tests)
COM3 = COM3 Port Monitor (prints traffic to COM2)
NTX = Nibble Test (enables nibble TX test pattern)
PTX = PCM Test (enables PCM TX counting pattern)
TXINIT = Vocoder Control Nibble Initialize Bit
TXMUTE= Vocoder Control Nibble Mute Bit
TXLOST= Vocoder Control Nibble Lost Bit
TXCLEAR=Expanded Control Nibble Error Clear Bit
C1FMT = ASCII Compressed Voice Long Format (C1)
onstate ON Enables the test feature.
OFF Disables the test feature.
noff
FMDE→FMEN Offset (Normal Timing). When the NIBCLK
source is internally generated (master mode), normal timing
is enabled, and the unit is in TEST mode, this controls the
positioning of the FMEN pulse relative to the FMDE pulse.
The value represents the number of NIBCLKs to wait before
asserting the FMEN pulse.
PARAMETERS
toff
FMDE→FMEN Offset (Truncated Timing). When the
NIBCLK source is internally generated (master mode),
truncated timing is enabled, and the unit is in TEST mode,
this controls the positioning of the FMEN pulse relative to the
FMDE pulse. The value represents the number of NIBCLKs
to wait before asserting the FMEN pulse.
- FA100-00107 1
- BOARD MANUAL 1
- Board Manual 2
- 1.0 INTRODUCTION 7
- 2.0 GENERAL DESCRIPTION 9
- 2.2 Features 10
- 3.1 Main Signal Connector 11
- Table 1: DIN Signals 12
- 3.2 Terminal Connectors 15
- 3.3 Audio Connectors 16
- 3.4 LED Indicators 17
- 3.5 Switch Controls 18
- 4.0 INSTALLATION 19
- 4.3.1 Timing Configuration 20
- 5.0 FUNCTIONAL DESCRIPTION 23
- 5.1.3 DEMO Mode 24
- 5.2 Interfaces 25
- 5.2.3 NIB Interface 26
- 5.3 Voice Processing 28
- PACKET VOICE ROUTER 31
- 5.4.1 Truncated Timing Mode 34
- 5.4.2 Voice Delay 35
- 5.4.3 Programmable LEDs 37
- 5.4.4 Command Processor 39
- 6.1 Hardware Architecture 40
- 6.1.2 Memory Maps 42
- Figure 17: Data Memory Map 43
- Figure 19: Flash Memory Map 44
- 6.2 Software Architecture 45
- Table 8: Thread List 47
- 7.0 MAINTENANCE AND TEST 50
- 7.2.1 Audio Tools 52
- 7.2.2 Nibble Tools 54
- 7.2.3 PCM Tools 54
- 7.3.1 Standard Mode Upgrade 55
- 7.4.1 Test Vector Execution 59
- 7.4.2 DAT2LIN Utility 61
- 7.4.3 BIT2CMP Utility 62
- 8.1 Command Overview 63
- 8.2 Built-In Help 65
- 8.3 Command Reference 66
- 8.3.1 ADAPT 67
- 8.3.2 BIT 68
- Latched 70
- 8.3.3 CFG 71
- 8.3.4 CLKDET 73
- 8.3.5 CLKRATE 74
- 8.3.6 CLKREF 76
- 8.3.7 CLKSRC 77
- 8.3.8 COMCFG 78
- 8.3.9 COMECHO 79
- 8.3.10 COMPROMPT 80
- 8.3.11 COUNT 81
- 8.3.12 DELAY 83
- 8.3.13 DM 84
- 8.3.14 DUMP 85
- 8.3.15 FLASH 86
- 8.3.16 FM 87
- 8.3.17 FRAMESIZE 88
- 8.3.18 GAM 89
- 8.3.19 IO 90
- 8.3.20 LED 91
- 8.3.21 LOOP 92
- 8.3.22 MACRO 93
- 8.3.23 MCBSP 94
- 8.3.24 MIX 95
- 8.3.25 OPMODE 96
- 8.3.26 PROG 97
- 8.3.27 REM 98
- 8.3.28 RESET 99
- 8.3.29 ROUTE 100
- 8.3.30 TEST 101
- 8.3.31 TONE 103
- 8.3.32 TRUN 104
- 8.3.33 VERSION 105
- 8.3.34 VOC 106
- 8.3.35 WAIT 108
- 9.0 GLOSSARY 109
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