Filter
Top Products
LBI-38988
Rev. B 13
whenever the communications between the Site Controller
and the Control Channel GETC is lost.
STATION CONTROL
The Station GETC controls the Repeater Station's
radio through the following interface and control lines:
DELAY PTT (J6-1) Station executes an EXTernal
PTT sequence to key the
station transmitter.
REM PTT OUT (J6-16) Station executes a REMote
PTT, used to control audio
routing from the remote line
input to the transmitter.
RUS OUT (J7-15) Controls receiver (Vol/Sq)
audio sent to the transmitter.
DET DIS (J6-10) Detect Disable signal disables
LSD while sending HSD to the
transmitter.
PA FAIL (J7-13) RF power amplifier failure
sensing line.
SYNTH LOCK DET
(J6-13)
Synthesizer-exciter lock detect
indicator.
SYNTH CLK (J6-12) Synthesizer-exciter clock line
(MIIe - 800/900 MHz
applications only).
SYNTH DATA (J6-11) Synthesizer-exciter data line
(MIIe - 800/900 MHz
applications only).
SYNTH LD EN (J6-15) Synthesizer-exciter load enable
pulse line (MIIe - 800/900
MHz applications only).
TX MOD (J7-4)
Direct modulation input to the
synthesizer-exciter (MIIe
only).
GETC DATA (J7-5)
Input to the transmitter for
filtered High Speed Data
(HSD) to be transmitted.
VOL\SQ HI (J7-2)
Unfiltered receiver audio (9600
or 4800 baud data, voice, or
Low Speed Data (LSD).
LSD TX (J19-5)
Low-Speed Data to be
transmitted.
1950 DIS (J6-5)
Keeps line output active during
absence of a clear voice,
working channel call (EDACS
Voting System).
For a complete description of the interface signals, and
their activity during the various operating modes, refer to
Table 15 .
The GETC uses the following lines to communicate
with other GETCs and with the Site Controller:
TX DATA LINK
Serial link, transmit output, to
the Site Controller.
RX DATA LINK
Serial link, received input from
the Site Controller.
BSL
Backup Serial Link between
Failsoft GETC's.
SYNC
Frame Sync Line (FSL)
provides GETC
synchronization in trunked
stations.