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Remote Control Options (950-9074 and 950-9111)
Remote Control Options (950-9074 and 950-9111)
Most radio stations for wide area paging are located at a distance from a Zetron 2000
Series Paging Terminal. Consequently, the station card (702-9038) can be equipped with
options for Single Site Remote Control (950-9074) or Multiple Site Remote Control (950-
9111). These remote control options are compatible with Motorola PURC transmitter
control shelf equipment or a Zetron Model 66 Transmitter Control Panel. When so
equipped, the Zetron station card can directly drive a dedicated line or link transmitter
with just a few wires:
Figure 21: Generic Link Transmitter Interface
NOTES:
• IMPORTANT: AUX PTT must be used to key link transmitter. ANA PTT and DIG
PTT are not asserted soon enough resulting in a missed HLGT*.
• On the Zetron Model 2200 Expanded Backplane and all Model 2100's, the TX
audio outputs appear on extra connectors to save on connector wiring (see Radio
Connectors on page 98).
• Following are typical parameters for controlling a Zetron Model 66 transmitter
controller or a Motorola PURC transmitter via remote control (refer to System
Configuration Files on page 217 for details on this):
* HLGT is High Level Guard Tone. The value of 420ms is typical; figure it as
120ms, plus 300ms per RF link delay. Thus, if your signal went through two tone-
keyed RF links, you would set it to 720ms.
pp Meaning cc qq ...
07 PURC remote control mode 02 02
04 TMOD - Mode switch time 03 00 64 = 100ms
02 TKEY - Keyup time 03 01 A4 = 420ms HLGT*
06 Digital Data Polarity 02 00 = inverted
TX Audio Hi/Lo
AUX PTT NO
AUX COM
Tone Audio
PTT
Ground
Station Card
with Remote Control
Antenna
Most Bands
TX Link Transmitters
RF to Radio Site
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