ZETRON 2000 Series Specifications Page 113

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113
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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