CV-786

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