Wavecom W74PC V8.7.0 - Manual (Page 273)

WAVECOM Decoder W74PC, W-PCI/e, W-CODE, W-CLOUD Manual V8.7.0 Transmission Modes
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ZVEI-3
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
Receiver settings FM, BW = 12 kHz
Modulation FM, SUB Tone
Input format(s) AF, IF
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).
In most systems the accuracy of the single frequencies has to be within +1/-1.5% of the nominal value.
For ZVEI modes having nominal tone durations of 70 ms, the duration of a single tone may vary ± 15 ms.
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 2200 8 1830
1 970 9 2000
2 1060 A 886
3 1160 B 810
4 1270 C 740
5 1400 D 680
6 1530 E 2400
7 1670
Tone duration: 70 ms.
ZVEI-VDEW
The digital selective calling systems ZVEI and VDEW were defined for selective call and data transmission
in the non-public mobile land radio service. The ZVEI system adheres to the recommendation AK SRDS
87-3D, while the VDEW system was known as DIN45013 until 1992. The systems are identical on the
physical layer. Due to the special requirements of the VDEW some additional features where added to the
ZVEI system.
Parameter Value
Frequency range VHF/UHF
Operation modes Digital Selcal
Modulation FFSK
Symbol rate 1200 Bd
Center frequency 1500 Hz
Shift/Bandwidth 600 Hz