Line Interface Port - Vertex Standard VXR-7000 Manual De Instrucciones

LINE Interface Port

The VXR-7000 is provided with an 8-pin modular jack
for line interfacing applications. A Western Electric
modular-type RJ45 plug should be used to connect to
this jack. The LINE jack pin-out is shown below.
Note that there are both 4-line and 8-line types of modu-
lar plugs. If a 4-line modular plug is used, only the LINE
OUT and LINE IN connections will be made. An 8-line
plug is required to access all lines. In accordance with
standard telecommunications interface, the line connec-
tions on the LINE interface jack are impedance balanced,
and are described as follows.
Pins 1 & 2: [RX SQ + , RX SQ – ]
An opto-isolator is provided to facilitate E (EAR)
signaling. The opto-isolator comes on when a sig-
nal exceeding the receiver squelch appears on the
receiver channel (with correct CTCSS tone or DCS
code, if enabled). The RX SQ(–) pin is the emitter,
and RX SQ(+) is the collector.
Maximum Voltage: 20 V, Maximum Current: 7 mA.
Pins 3 & 4: [LINE IN (Tx Line Audio)]
Analog signals between 300 and 3000 Hz supplied
to this pair are fed to the transmitter when the re-
peater is set to the BASE mode (the REPEATER LED
is turned off) and keyed either by the TX KEY input
signal (see below), or by the EXT PTT signal on pin
12 of the rear panel's ACC jack. Standard deviation
is obtained with a line level of –10 dBm.
6
Pins 5 & 6: [LINE OUT (Rx Line Audio)]
®
Receiver audio is available from this pair, subject to
internal CTCSS or DCS decode if the received sig-
nal strength is above the squelch threshold.
As shipped from the factory, a 1-kHz receiver sig-
nal with standard deviation gives –10 dBm on the
line, but this can be varied by VR4002 and S4001
(on the repeater's CNTL Unit).
Pins 7 & 8 [TX KEY(+), TX KEY(–)]
An opto-isolator is provided to facilitate M (MIC)
signaling. That is, a voltage presented to these pins
turns on the opto-isolator and keys the transmitter.
The TX KEY(+) pin is the anode of the opto-isolator,
and RX SQ(–) is the cathode of the opto-isolator.
Maximum Voltage: 20 V, Maximum Current: 4 mA.
Modular Jack Pin Numbering
VXR-7000 FM R
LINE Jack
O
EPEATER PERATING
M
ANUAL