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ATEST(1) General Commands Manual ATEST(1) NAME atest - Decode AX.25 frames from an audio file. SYNOPSIS atest [ options ] wav-file-in wav-file-in is a WAV format audio file. DESCRIPTION atest is a test application which decodes AX.25 frames from an audio recording. This provides an easy way to test Dire Wolf decoding perfor- mance much quicker than normal real-time. OPTIONS -B n Data rate in bits/sec. Standard values are 300, 1200, 2400, 4800, 9600. 300 bps defaults to AFSK tones of 1600 & 1800. 1200 bps uses AFSK tones of 1200 & 2200. 2400 bps uses QPSK based on V.26 standard. 4800 bps uses 8PSK based on V.27 standard. 9600 bps and up uses K9NG/G3RUH standard. AIS for ship Automatic Identification System. EAS for Emergency Alert System (EAS) Specific Area Message Encoding (SAME). -g Force G3RUH modem regardless of data rate. -j 2400 bps QPSK compatible with Dire Wolf <= 1.5. -J 2400 bps QPSK compatible with MFJ-2400. -D n Divide audio sample rate by n. -h Print frame contents as hexadecimal bytes. -F n Amount of effort to try fixing frames with an invalid CRC. 0 (de- fault) = consider only correct frames. 1 = Try to fix only a single bit. more = Try modifying more bits to get a good CRC. -L Error if Less than this number decoded. -G Error if Greater than this number decoded. -P m Select the demodulator type such as D (default for 300 bps), E+ (de- fault for 1200 bps), PQRS for 2400 bps, etc. EXAMPLES gen_packets -o test1.wav atest test1.wav gen_packets -B 300 -o test3.wav atest -B 300 test3.wav gen_packets -B 9600 -o test9.wav atest -B 9600 test9.wav This generates and decodes 3 test files with 1200, 300, and 9600 bits per second. atest 02_Track_2.wav atest -P E- 02_Track_2.wav atest -F 1 02_Track_2.wav atest -P E- -F 1 02_Track_2.wav Try different combinations of options to compare decoding perfor- mance. SEE ALSO More detailed information is in the pdf files in /usr/local/share/doc/dire- wolf, or possibly /usr/share/doc/direwolf, depending on installation loca- tion. Applications in this package: aclients, atest, cm108, decode_aprs, dire- wolf, gen_packets, kissutil, ll2utm, log2gpx, text2tt, tt2text, utm2ll ATEST(1)
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | EXAMPLES | SEE ALSO
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