Wavecom W40PC, Руководство пользователя

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Transmission Modes WAVECOM Decoders v6.15 W40PC, W41PC, W51PC
If errors are received the two last 32 bit blocks are retransmitted when the radio channel rate is
125 Baud and three blocks when working at 250 Baud.
Like DUP-ARQ-2, DUP-FEC-2 has many special blocks for IDLE and RQ.
EEA
Parameter Value
Frequency range VHF/UHF
System SELCAL Analog
Modulation INDIRECT-FM
Receiver settings FM 12 kHz, narrow
Signal source AF (only)
Selective call systems are an efficient supplement to voice traffic.
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 there 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).
In most systems the accuracy of the single frequencies has to be 1/-1.5% of the
nominal value.
Decoding the selective calls is started by clicking on a system. If transmission and system
selection conform, the call sign is displayed on the monitor. In the “Options” menu a “Time
stamp” function can be enabled to add date and time to each call.
Tone Allocation
DIGIT EEA
0 1981
1 1124
2 1197
3 1275
4 1358
5 1446
6 1540
7 1640
8 1747
9 1860
A 1055
B 930
C 2246.9
D 991
E 2110
F
TONE DURATION 40 ms