Wavecom W74PC V8.7.0 - Manual (Page 210)

200

Transmission Modes WAVECOM Decoder W74PC, W-PCI/e, W-CODE, W-CLOUD Manual V8.7.0
AHY(P:79,I1:760,I2:770,D:0,P:0,CHK:1,E:0,AD:0).
General availability check on the called (D:0) unit 760 (I1:760) sent before allocating a traffic channel.
The TSC is checking if the called unit is ready for a data call (CHK:1). The calling party 770 (I2:770) is
requesting a non-emergency transaction. No data codeword (AD:0) is appended to this AHY message.
GTC(P:79,I1:760,CH:427,I2:770,N:0).
Calling unit 770 and called unit 760 are directed to proceed with traffic on channel 427 (CH:427). The
next frame contains no timeslots (N:0).
A broadcast message:
BCAST(SYSDEF:5,SYS:20265,CH:520,SPARE:0,RSVD:00,ADJ:2).
Option for non-active radio units to determine the signal strength (SYSDEF:5) at the following time slice
on control channel 520 (CH:520) of system 20265 (SYS:20265) having local serial number 2 (ADJ:2).
To select monitoring either the base station (Fixed) or the Mobiles, use Options/Station. To change the
display format of Data Code Words use Options/Format.
NATEL
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.
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
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 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.
Tone Allocation
Digit Hz Digit Hz
0 1633 8 1336
1 631 9 1477
2 697 A 1633
3 770 B 600
4 852 C 1995
5 941 D 2205
6 1040 E 1805
7 1209 Tone Duration 70 ms