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17
Installation and Connection
Connecting External Devices
Connection to an external controller
To control the DR-1X/DR-1XE remotely, optional cables can be used to connect the repeater to an external controller.
Use the [CONTROL I/O] connector at the back of the repeater to connect with the external controller.
To interface the DR-1X/DR-1XE with an external controller, additional cables with a 15-pin mini d-sub connector are needed to connect
to the [CONTROL I/O] connector. Your controller may also require rewiring.
Link operation may require four connections: receiver audio, transmitter audio, receiver COR, and transmitter PTT; however these are
not available on the [CONTROL I/O] connector.
The pin assignment of the [CONTROL I/O] connector is as follows.
5~1
10~6
15~11
Pin No
Pin Name
I/O
Descriptions
1
EXT I/O
Input
[L] GND: Remote mode [H] OPEN: Repeater mode
2
PTT
Input
[L] GND: EXT PTT ON [H] OPEN: EXT PTT OFF
When this pin is pulled low by an external device, it keys the repeater transmitter.
Tip
On signaling while controlling the external PTT:
Pin 6 (TONE IN) ... Valid
Pin 7 (AF IN) ... Invalid
3
CTCSS/DCS
(PKSQL)
Output
[L] GND: Decoded [H] OPEN: Un-decoded
Signaling settings in the repeater setup menu will be applied.
4
SQL DET
(Noise SQL)
Output
[L] GND: SQL open [H] OPEN: SQL close
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 indicates a
carrier on the receiver channel.
5
GND
GND
Chassis ground for all logic levels and power supply return
6
TONE IN
Input
CTCSS/DCS EXT input / 600 ohm, 500 mV peak to peak
Valid during external PTT control
This pin is sub-audible tone input, and has a flat response characteristic (repeater
deviation is constant for a given signal level over the frequency range of 5 ~ 250
Hz). Injecting a too high signal level here causes over-deviation of CTCSS or DCS,
degrading performance.
Use shielded cable to connect to this pin, connecting the shield to GND.
7
AF IN
Input
EXT Modulation input / 600 ohm, 1.5 V peak to peak
Valid during external PTT control
This pin is audio input (300 ~ 3,000 Hz). This audio is injected before the splatter filter
stage, so excess signal input levels are clipped.
It is impossible to input analog modulation signals and convert them to digital signals
on DR-1X/DR-1XE.
Use shielded cable to connect to this pin, and connect the shield to GND.
Tip
AF IN is usually used for analog modulation input with a packet speed of 1200 bps, however,
to input C4FM digital signals for digital modulation operations, enter the DR-1X/DR-1XE
Repeater mode, then touch the up-link frequency display area to change the packet speed to
9600 bps.
8
DISC OUT
Output
Up-link RX DISC output (w/o de-emphasis), 500 mV peak to peak
Discriminator output during up-link reception. Does not affect the operation mode of the
repeater.
Received signals with standard deviation produce 500 mVp-p audio (0 ~ 3,000 Hz) are
output at this pin. The signal is extracted before the de-emphasis and squelch circuitry.
Use shielded cable to connect to this pin, and connect the shield to GND.
9
AF OUT
Output
Up-link RX AF output (w/ de-emphasis), 300 mV peak to peak
Analog audio output during up-link reception. Does not affect the operation mode of the
repeater.
This pin is an output for AF signal (300 mVp-p), being extracted after the de-emphasis.
Demodulated digital signals can be output as well.
10
GND
GND
Chassis ground for all logic levels and power supply return