General Information
MIL-M-55529A is a synchronous FSK mode built into GRC-MD522
teletypewriter sets.
This mode is also known as MD-522
(NB/WB).
Usage:
§ Transfer of textual information over HF.
Mode Details
|
|
Item |
Value |
|
|
Standard |
Modulation |
FSK |
|
|
|
Tones |
2 |
|
|
|
Version |
NB |
WB |
|
|
Shift (Hz) |
85 |
850 |
|
|
Bandwidth (Hz) |
200 |
1000 |
|
|
Center Frequency (Hz) |
2804 |
2000 |
|
|
Symbol rate (Bd) |
50, 75, 100, 110 | |
|
|
Data rate (bit/s) |
28 / 42 / 55 / 61 |
32 / 48 / 64 / 70 |
|
|
Alphabet |
ITA2, ITA5 | |
|
Demodulator Settings |
Demodulator |
FSK 2 matched | |
|
|
Symbol rate (Bd) |
100 | |
|
|
SR tolerance (Bd) |
10 | |
|
|
Shift (Hz) |
85 |
850 |
|
|
Modem type |
Synchronous | |
|
|
Min. burst length (s) |
0.100 |
|
|
|
Max. burst length (s) |
1.000 |
|
|
|
Min. pause length (s) |
0.100 |
|
|
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’s frequency range | ||
Table 12: MIL-M-55529A
Figure 14: MIL-M-55529A Spectrogram
Modem Version History
|
Release |
Date |
History |
|
2.0.0 |
2013-01-10 |
Modem added |