
Theory of Operation
176 025-9035AA
Figure 41: New Zone Selected While Keyed (Remote Control Mode = 00, 01, or 02)
Figure 42: External Equipment requests with BUSY (Remote Control Mode = 00, 01, 02)
Timing Diagrams for External TX Control Unit
The following diagrams show the timing for use with an external transmitter control unit
such as the Motorola PSC or SSC. They specially require the overlap in time of the PTT
signals so the remote station does not unkey. In addition, the signal names COR/CAS and
BUSY take on new meaning since they are used for handshaking with the control unit.
The Remote Control Mode parameter 07 is programmed to a value of 04 in
oparam.cds.
Note TBAT = batch scanning time, approximately 2 seconds ZONE ADR
remains set to last zone keyed until next paging message.
Z-16
TREQ
XMIT
REQUEST
ZONE ADR
8/4/2/1
AUX
VALID
INVALID
ANA PTT or
DIG PTT
DIG DATA or
TX AUDIO
TKEY + TMOD
TMOD
ON
OFF
ON
OFF
ON
OFF
ON
OFF
XMIT
REQUEST
ZONE ADR
8/4/2/1
AUX
COR/CAS or
BUSY
NA PTT o
DIG PTT
VALID
INVALID
ON
OFF
TGRANT
Zetron waits
TBSY
Z-16a
External
Uses TX
DIG DATA or
TX AUDIO
TKEY + TMOD
Zetron
Finishes Batch
ON
OFF
ON
OFF
ON
OFF
ON
OFF
Comentarios a estos manuales