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The VXR-9000E repeater is provided with a 25-pin
DB-25F female connector for interconnections to ac-
cessories.Use a DB-25M 25-pin male connector to
connect accessories to the repeater. The pins on the
accessory connector are explained in detail as fol-
lows:
1: GND
p
in
Chassis ground for all logic levels and power supply
return.
2: +13.6 V
p
in
[ Power Supply ]
This pin provides 13.6 Volts, 2.0 A, DC from the re-
peater supply. There is a internal 3 A fuse to prevent
damage to the repeater.
3: TX AF IN
p
in
[ Analog Transmitter Input ] ( Voice Band: 300 ~ 3,000 Hz )
This pin is audio input. Input impedance is 600
Ohms. This audio is injected before the splatter filter
stage, so excess signal input levels are clipped.
Use shielded cable to connect to this pin, and con-
nect the shield to GND.
4: TONE IN
p
in
[ Transmitter Input ] ( Sub-audible Band: 5 ~ 250 Hz )
This pin is sub-audiable input. The input is high im-
pedance (approx. 22 k-ohms), and has a flat response
characteristic (repeater deviation is constant for a
given signal level over the frequency range of 5 ~ 250
Hz). Injecting too high a voltage here causes over-
deviation of CTCSS or DCS, degrading performance.
Use shielded cable to connect to this pin, connecting
the shield to GND.
DB-25 p
VXR-9000E FM R
n
in
uMBeRing
O
EpEatER
pERating
DB-25 Connector Port
p
5: TX ATT
in
This output is intended for controlling an external
coaxial switching relay. It is an open drain output
which can sink approx. 1.5 A when active. The delay
time which is between the repeater cause to transmit
mode and this port switches to ground can be pro-
grammed by your Vertex Standard dealer.
6: DISC OUT
p
in
[ Analog Output ] ( Wide-Band: 0 ~ 3,000 Hz )
Received signals with standard deviation produce
350 mVrms audio at this pin. The output impedance
is 600 Ohm, and is extracted before the de-emphasis
and squelch circuitry. Use shielded cable to connect
to this pin, and connect the shield to GND.
p
7: N.C.
in
No connection.
8: RSSI
p
in
[ Analog Output]
A DC voltage proportional to the strength of the
signal currently being received (Receiver Signal
Strength Indicator) is provided on this pin. This
low impedance output is generated by the receiver
IF sub-system and buffered by an internal op-amp.
Typical voltages are graphed as follows:
(DC V)
2.5
2.0
1.5
1.0
0.5
0
-60
-70
9: COAX. SW
p
in
[ Logic Output ( Active Low )]
This output is intended for controlling an external
coaxial switching relay. It is an open drain output
which can sink approx. 1.5 A when active. This
signal only switches if the repeater has been pro-
grammed for "SIMPLEX" mode. If programmed for
"DUPLEX," the signal remains open (high imped-
ance) at all time.
M
anual
-80
-90
-100
-110
Input Signal Level
-120
(dBm)
7
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