DSUB 25-pin Accessory Connector
B-2
Pin 10
,
13
,
15
,
16
,
17
,
18
,
19
,
21
:
P
ROGRAMMABLE
I/O “0” ~ ”7”
The
VXR-9000
provides eight ports (PIO)
that can be programmed for various input
or output signals, or for control functions.
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 operating
in the “
Remote
”
mode. See Tables on the
next page for detail regarding the input and output sig-
nals.
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.
Pin 22
: RXD LOW
[
A
NALOG
O
UTPUT
FOR
DATA C
OMMUNICATIONS
]
(
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
IGITAL
O
UTPUT
FOR
DATA C
OMMUNICATIONS
]
(
Max.: 5 kHz
)
This pin is an output for high speed receiving data signals
(typically 9600 bps), with the data being extracted imme-
diately after the discriminator (prior to any de-emphasis).
Pin 24
: TXD LOW
[
A
NALOG
I
NPUT
FOR
DATA C
OMMUNICATIONS
]
(
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
IGITAL
I
NPUT
FOR
THE
DATA C
OMMUNICATIONS
]
(
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.
Pin I/O Port
10
6
13
7
15
4
16
3
17
2
18
1
19
0
21
5
Summary of Contents for VXR-9000EV
Page 6: ...B 4 DSUB 25 pin Accessory Connector Note ...
Page 8: ...Exploded View Miscellaneous Parts C 2 Note ...
Page 9: ...D 1 Block Diagam MAIN Unit ...
Page 10: ...D 2 Block Diagam CNTL Unit PANEL Unit 25W PA Unit ...
Page 11: ...E 1 Connection Diagam ...
Page 12: ...E 2 Connection Diagam Note ...
Page 16: ...Circuit Description F 4 Note ...
Page 20: ...MAIN Unit H 2 Note ...
Page 37: ...CNTL Unit I 1 Circuit Diagram ...
Page 38: ...CNTL Unit I 2 Note ...
Page 51: ...PANEL Unit J 1 Circuit Diagram ...
Page 52: ...PANEL Unit J 2 Note ...
Page 53: ...J 3 PANEL Unit Parts Layout Side A B A D C F E 1 3 2 4 RT1P441U P3 Q4006 MC2850 A7 D4002 ...
Page 59: ...K 1 25W PA Unit Circuit Diagram ...
Page 60: ...K 2 25W PA Unit Note ...
Page 62: ...K 4 25W PA Unit Parts Layout Side B 1 3 5 2 4 b a d c f e g h ...
Page 67: ...L 1 REG Unit Circuit Diagram ...
Page 69: ......