Wavecom W74PC V8.7.0 - Manual (Page 147)

WAVECOM Decoder W74PC, W-PCI/e, W-CODE, W-CLOUD Manual V8.7.0 Transmission Modes
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Tone Allocation
Digit Hz Digit Hz
0 1981 8 1747
1 1124 9 1860
2 1197 A 2400
3 1275 B 930
4 1358 C 2247
5 1446 D 991
6 1540 E 2110
7 1640 9 1860
Tone Duration
Protocol Time
CCIR-1 100 ms
CCIR-2 70 ms
CCIR-7 70 ms
CCITT
The entire call number is transmitted by consecutive tones in decade sequence. When two identical digits
are to be transmitted consecutively, then an eleventh frequency is used as a repetition identifier. If more
than two identical digits are to be transmitted, the repetition tone is appended to the digit tone (e.g.,
22222 is transmitted as f2 fw f2 fw f2, where f2 is the tone for "2" and fw is the repetition tone).
Parameter Value
Frequency range VHF/UHF
Operation modes Analogue Selcal
Modulation FM, SUB Tones
Receiver settings FM 12 kHz, narrow
Signal source AF, IF
In most systems the accuracy of the single frequencies has to be within +1/-1.5% of the nominal value.
Decoding the selective calls is started by clicking on a system. If transmission and system selection con-
form, the call sign is displayed on the monitor. In the Options menu a Time stamp function can be ena-
bled to add date and time to each call.