WAVECOM Decoder W74PC, W-PCI/e, W-CODE, W-CLOUD Manual V9.1.0
Transmission Modes
203
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
Mobile
s, 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 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
