Channel Steering Chart - Vertex Standard VXR-9000 Service Manual

DSUB 25-pin Accessory Connector
Pin 10, 13, 15, 16, 17, 18, 19, 21:
P I/O "0" ~ "7"
ROGRAMMABLE
The VXR-9000 provides eight ports (PIO)
that can be programmed for various in-
put or output signals, or for control func-
tions. Each port may be programmed as
to its function, its status (input or output),
and its logic (for output ports only). Each
port activates while the repeater is oper-
ating in the "Remote" mode. See Tables
on the next page for detail regarding the input and out-
put signals.
Pin 11: NSQ DET
This is an open-collector, active-low output capable of
sinking about 10 mA. It indicates that the receiver squelch
is open. If the squelch control is properly set, this indi-
cates a carrier on the receiver channel.
Pin 12: EXT PTT
This input is internally pulled up to 5 VDC. When pulled
low by an external device, it keys the repeater transmitter
while the repeater is operating in the "Remote" mode.
Avoid voltage in excess of 5 V on this pin, or internal dam-
age to the microprocessor on the repeater CNTL Unit may
result.
Pin 14, 20: GND
Chassis ground for all logic levels and power supply re-
turn.
O
PERATING
C 4
HANNEL
1 1
2 1
3 1
4 1
5 1
6 1
7 1
8 1
9 1
10 1
11 1
12 1
13 1
14 1
15 1
16 1
B-2
Pin I/O Port
10 6
13 7
15 4
16 3
17 2
18 1
19 0
21 5
C
HANNEL
Bin CH
3 2 1
1 1 1
1 1 1
1 1 0
1 1 0
1 0 1
1 0 1
1 0 0
1 0 0
0 1 1
0 1 1
0 1 0
0 1 0
0 0 1
0 0 1
0 0 0
0 0 0
Pin 22: RXD LOW
[ A
O
NALOG UTPUT FOR
( 300 ~ 3,000 Hz )
This pin is an output for low speed receiving data signals
(typically 1200 bps), with the data being extracted after
the de-emphasis and low pass filter stages.
Pin 23: RXD HIGH
[ D
O
IGITAL UTPUT FOR
( Max.: 5 kHz )
This pin is an output for high speed receiving data sig-
nals (typically 9600 bps), with the data being extracted
immediately after the discriminator (prior to any de-em-
phasis).
Pin 24: TXD LOW
[ A
I
NALOG NPUT FOR
( 300 ~ 3,000 Hz )
This pin is intended to be used as a low speed data signal
input to the repeater (typically 1200 bps). This digital data
signal is injected before the transmitter pre-emphasis and
limiting stages, so excess signal input levels are clipped.
Pin 25: TXD HIGH
[ D
I
IGITAL NPUT FOR THE
( 0 ~ 5 kHz )
This pin is intended to be used as a high speed digital
data signal input to the repeater (typically 9600 bps). This
digital data signal is injected after the transmitter splatter
filter stage.
S C
TEERING HART
O
PERATING
0 C 4
HANNEL
1 17 0
0 18 0
1 19 0
0 20 0
1 21 0
0 22 0
1 23 0
0 24 0
1 25 0
0 26 0
1 27 0
0 28 0
1 29 0
0 30 0
1 31 0
0 32 0
DATA C
OMMUNICATIONS
DATA C
OMMUNICATIONS
]
DATA C
OMMUNICATIONS
DATA C
OMMUNICATIONS
Bin CH
3 2 1
1 1 1
1 1 1
1 1 0
1 1 0
1 0 1
1 0 1
1 0 0
1 0 0
0 1 1
0 1 1
0 1 0
0 1 0
0 0 1
0 0 1
0 0 0
0 0 0
]
]
]
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0