
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 54
Figure 24: FAA20 Test Vector Setup
To execute test vectors on the FAA20, complete the following steps:
1. Convert all binary files (from the DVSI software release 1.2.0
CDROM) to ASCII files using the FAA20 ASCII conversion utilities.
For additional information, see Section 7.4.2 and Section 7.4.3.
2. Insure that both command ports, COM1 and COM2, have hardware
flow control enabled. Insure the terminal emulation program also
has hardware flow control enabled.
3. Enter the command ‘TEST BITEXACT ON’ to configure the FAA20
to accept test vectors.
This command stops the real time flow of data to the vocoder,
configures the mixer/router to use the COM ports, and initializes the
vocoder.
4. If the test vector requires DTX mode, manually enter the command
‘VOC DTX ON’.
5. If the test vector requires soft detection bits, manually enter the
command ‘VOC SDBITS x’ where ‘x’ is the required number of bits.
6. Configure the terminal emulation program to capture COM2 terminal
traffic to a file, i.e., the output file.
7. Configure the terminal emulation program to send the ASCII input
file to COM1.
8. When the vector transmission is complete, close the captured
output file and compare it with an ASCII version of the supplied
reference test vector file.
USB
COMPUTER
KEYSPAN
USA-49W
FAA20
FA100-00071
RS-232
RS-232
Loop Adapter
FA100-00184
Power Supply
FA100-00187
Terminal Emulation Software
Tera-Term Pro (Version 2.3)
Test Vectors (Release 1.2.0)
FAA20 Vector Conversion
Utilities and Batch Files
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