atest1

Usage

Overview

atest is a test application which decodes AX.25 frames from an audio recording. This provides an easy way to test Dire Wolf decoding performance 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 (default) = 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+ (default 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

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