General Information
MEROD is a Message Entry and Read-Out Device for exchange of encrypted tactical messages over a radio channel in burst mode.
Usage:
§ Exchange of tactical information over HF with emissions of minimum length.
Mode Details
|
|
Item |
Value |
|
Standard |
Modulation |
FSK |
|
|
Number of tones |
2 |
|
|
Shift (Hz) |
810 |
|
|
Bandwidth (Hz) |
1200 |
|
|
Symbol rate (Bd) |
266 |
|
|
Error correction |
BCH(127,78) |
|
|
Alphabet |
MEROD specific 6 bit |
|
Demodulator Settings |
Demodulator |
FSK 2 matched |
|
|
Symbol rate (Bd) |
150 |
|
|
SR tolerance (Bd) |
5 |
|
|
Shift (Hz) |
810 |
|
|
Shift tolerance (Hz) |
20 |
|
|
Modem type |
Synchronous |
|
Features |
Demodulation |
yes |
|
|
Recognition |
yes |
|
|
Decoding |
yes |
|
|
Automatic Polarity Adjustment |
yes |
|
|
Combination with other modems (modem list) |
yes |
|
Tuning |
The tuning frequency is the center of the signal | |
Table 135: MEROD
Figure 47: MEROD Spectrogram