General Information
Globe Wireless FSK is one of several radio modems used by the Globe Wireless Company in the HF-frequency band.
Usage:
§ Transfer of SelCal and status messages over HF.
Mode Details
|
|
Item |
Value |
|
Standard |
Modulation |
FSK |
|
|
Number of tones |
2 |
|
|
Shift (Hz) |
200 |
|
|
Bandwidth (Hz) |
300 |
|
|
Symbol rate (Bd) |
100 |
|
|
Error correction |
Parity checksum |
|
Demodulator Settings |
Demodulator |
FSK 2 matched |
|
|
Symbol rate (Bd) |
100 |
|
|
SR tolerance (Bd) |
10 |
|
|
Shift (Hz) |
200 |
|
|
Shift tolerance (Hz) |
10 |
|
|
Modem type |
Synchronous |
|
|
Min. burst length (s) |
0.700 |
|
|
Max. burst length (s) |
1.700 |
|
|
Min. pause length (s) |
0.120 |
|
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 117: Globe Wireless FSK
Figure 41: Globe Wireless FSK Spectrogram