General Information
CV-786 is a synchronous FSK mode built in MDM-2001 HF Modems. This modem is very similar to MD-674 and MIL-M-55529A.
Usage:
§ Data communication over HF.
Mode Details
|
|
Item |
Value |
|
Standard |
Modulation |
FSK |
|
|
Number of tones |
2 |
|
|
Symbol rate (Bd) |
50 / 75 / 100 / 110 / 150 Bit/s |
|
|
Error correction |
ARQ |
|
|
Alphabet |
ITA-2 / ITA-5 |
|
Demodulator Settings |
Demodulator |
FSK 2 matched |
|
|
Symbol rate (Bd) |
100 |
|
|
SR tolerance (Bd) |
50 |
|
|
Modulation order |
2 |
|
|
Shift (Hz) |
850 |
|
|
Shift tolerance (Hz) |
8 |
|
|
Modem type |
Synchronous |
|
Features |
Demodulation |
yes |
|
|
Recognition |
yes |
|
|
Decoding |
yes |
|
|
Automatic Polarity Adjustment |
no |
|
|
Combination with other modems (modem list) |
yes |
|
Tuning |
The tuning frequency is the center of the signal’s frequency range | |
Table 7: CV-786
Figure 9: CV-786 Spectrogram