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Radio Interface Timing Diagrams
Radio Interface Timing Diagrams
These diagrams show the relationship between the interface signals of the Radio Interface
card and the Radio Station. Signal names are described in the Radio System section.
Timing values are described in the System Configuration Files section. The first three
diagrams show control mode without a TX link controller unit (parameter 07 Remote
Control Mode in
oparam.cds is not 04).
Figure 39: Key Up Sequence (Remote Control Mode = 00, 01, or 02)
Figure 40: Mode Change from Analog to Digital and Back (Remote Control Mode = 00, 01,
or 02)
Note ZONE ADR remains set to last zone keyed until next paging
message
Note The AUX PTT relay stays on during digital to analog or analog to
digital mode changes.
XMIT
REQUEST
ZONE ADR
8/4/2/1
AUX
COR/CAS or
BUSY
ANA PTT or
DIG PTT
DIG DATA or
TX AUDIO
ON
OFF
TREQ
TBSY
TKEY + TMOD
TMOD
Z-14
TBAT
ON
OFF
ON
OFF
ON
OFF
VALID
INVALID
ON
OFF
ANA PTT
DIG PTT
DIG DAT
TX AUDIO
ON
OFF
Z-15
TGAP
TMOD
TMOD
ON
OFF
ON
OFF
TGAP
ON
OFF
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