General Information
CHU is a radio station in Canada that continuously broadcasts time of day information. It is operated by the National Research Council of Canada.
Usage:
§ Time information broadcasts.
Mode Details
|
|
Item |
Value |
|
Standard |
Modulation |
FSK |
|
|
Number of tones |
2 |
|
|
Shift (Hz) |
200 |
|
|
Bandwidth (Hz) |
500 |
|
|
Symbol rate (Bd) |
500 |
|
|
Coding |
BCD |
|
Demodulator Settings |
Demodulator |
FSK 2,3,4 discr. |
|
|
Symbol rate (Bd) |
300 |
|
|
SR tolerance (Bd) |
5 |
|
|
Modulation order |
2 |
|
|
Shift (Hz) |
200 |
|
|
Shift tolerance (Hz) |
5 |
|
|
Modem type |
Synchronous |
|
|
Min. burst length (s) |
0.200 |
|
|
Max. burst length (s) |
0.700 |
|
|
Min. pause length (s) |
0.150 |
|
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 55: CHU
Figure 20: CHU Spectrogram