General Information
CIS-12 is a Soviet military multi-channel modem. It features
scrambled voice- or data-communication at a maximum data rate of 4800
bits/sec.
This modem system is
also known as MS5 and FIRE.
Usage:
§ Data communication over HF.
Mode Details
|
|
Item |
Value |
|
Standard |
Modulation |
Multi-channel PSK2 / PSK4 |
|
|
Number of channels |
2 |
|
|
Channel spacing (Hz) |
200 |
|
|
Symbol rate (Baud) |
120 |
|
|
Coding |
Vocoder |
|
|
Pilot tone (Hz) |
3300 |
|
Demodulator Settings |
Demodulator |
MDPSK 2,4,8,16 A/B |
|
|
Symbol rate (Bd) |
120 |
|
|
SR tolerance (Bd) |
5 |
|
|
Modulation order |
4 |
|
|
Version |
A |
|
|
No. of channels |
12 |
|
|
Channel position type |
Channel distance |
|
|
Channel distance (Hz) |
200 |
|
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 | |
Table 61: CIS-12
Figure 22: CIS-12 Spectrogram