Ctcss – Wavecom W61PC V7.5.0 User Manual
Page 147
WAVECOM Decoder W61PC/LAN Manual V7.5
Transmission Modes
137
Parameter
Value
Speed
37.5, 50.0 or 75.0 ms
Receiver settings
DATA, CW, LSB or USB
Input format(s)
AF, IF
Additional Info
ITA-2
COQUELET-80 is used with the ATU-80 (Arabic) or the ITA-2 (Latin) alphabet. As for COQUELET-8 a char-
acter is coded with two tone assignments from group 1 and group 2.
Error correction is done by transmitting every character twice with a specified time offset. The second
transmitted character is mathematically reformatted (MOD 8). The leading (DX) and trailing characters
(RX) always have the same ODD or EVEN parity.
At the beginning of a message the RX character positions are filled with IDLE sequences. This mode does
error recognition, but no error correction.
Tone Assignment of COQUELET-80:
Tone Number
Frequency Hz
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
First Tone Group
1
773
1
1
1
2
800
1
1
3
826
1
4
853
1
5
880
1
1
6
907
1
1
7
933
1
8
960
Second Tone Group
5
880
1
1
6
907
1
7
933
1
8
960
CTCSS
The CTCSS selective calling system is defined according to EIA standard RS-220 and operates in the sub-
audio range. Applying this Continuous Tone Controlled Squelch System stations may be selectively called
either as a single user or as a group.
Parameter
Value
Frequency range
VHF/UHF
Operation modes
Analogue Selcal
Modulation
FM, SUB Tone
Receiver settings
FM, BW = 12 kHz
Input format(s)
AF, IF