The modem and FAX modes available in the decoder are mainly used on land lines, but may in as well be used on for instance satellite links. The modes are mainly analogue in nature.
|
Parameter |
Value |
|
Frequency range |
200-3800 Hz (wire) |
|
Symbol rate |
2400 - 14400 Bd |
|
Modulation |
TCM, DPSK, QAM |
|
Receiver settings |
Line coupler required to record WAV files. |
The modem and FAX mode is able to decode fax messages that are transmitted over the telephone wire.
There is a “Half-duplex Auto Mode” and a “Full-duplex Auto Mode” that will detect all transmission parameters automatically by analyzing the T.30 signaling.
WARNING: To interface with the line, a line coupler is required. This adapter has two functions: it connects the audio from telephone line to the decoder input at the correct level, and it isolates the recorder electrically from the telephone line. Do not connect the line directly to the decoder input; the decoder will interfere the fax signal and may be destroyed.