Ericsson EDACS Station GETC1e 19D901868G4 Installationshandbuch PDF herunterladen (Seite 10)

LBI-38988

STATION CONTROL

The Station GETC's control 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 10 .

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.

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 55 56

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