General Information
Golay - Pager is a paging protocol developed by Motorola Inc. Another designation for this modem type is Golay Sequential Code (GSC).
Usage:
§ Alert and status messages, emergency services etc. on VHF.
Mode Details
|
|
Item |
Value |
|
Standard |
Modulation |
FSK |
|
|
Number of tones |
2 |
|
|
Shift (Hz) |
2000 |
|
|
Bandwidth (Hz) |
2600 |
|
|
Symbol rate (Bd) |
300 / 600 |
|
|
Coding |
Golay(23,12) and BCH(15,7) |
|
Demodulator Settings |
Demodulator |
FSK 2 matched |
|
|
Symbol rate (Bd) |
600 |
|
|
SR tolerance (Bd) |
5 |
|
|
Shift (Hz) |
2000 |
|
|
Shift tolerance (Hz) |
10 |
|
|
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 | |
Table 14: Golay Pager
Figure 12: Golay Pager Spectrogram