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CONNECTIONS
to the microphone jack
POWER/TRANSMIT indicator
• Lights green when the power
is ON.
• Lights red while transmitting.
Remote
Communicator
(PC)
q
to [PC]
Supplied
audio cable
External switch
(user supplied)
w
to [EXT-CTRL]
GND
MONITOR
PTT
Connect the components to the CT-23 in the
following order:
q PC connection
Connect the microphone jack of the Remote
Communicator (PC) and [PC] using the
supplied audio cable.
L The sound card of the PC must cover the
frequency response range of up to 20 kHz,
and have a sampling rate of 48 kHz, for the
PTT and Monitor* function.
w External switch connection
Connect an external switch (user supplied)
to the [EXT-CTRL] connector to remotely
control the PTT and Monitor* function.
GND
MONITOR
TIP:
PTT
When the microphone is connected, you can transmit the microphone audio not only with the
microphone's [PTT] switch, but also with the Remote Communicator's [PTT] button, or the external switch.
To use the CT-23's PTT/Monitor function, set the function to ON in the remote communicator
(IP100FS/RC-FS10).
See the remote communicator manual for details.
Power adapter*
(BC-147S series)
to [DC IN]
r
to [MIC]
e
Microphone*
(SM-26, HM-152 or
SM-25 (discontinued))
* Purchase separately
e Microphone connection
Connect the SM-26, HM-152 or SM-25
(discontinued product) to [MIC].
You can use the following functions for your
NXDN or dPMR system.
• PTT function
• Monitor function
L Push the SM-26's or SM-25's [MONITOR]
switch, or take the HM-152 off the hook to
use the Monitor function.
HM-152 hand
SM-25 stand
r Power adapter connection
microphone*
microphone*
Connect one of the power adapters in the
BC-147S series that matches your power
voltage requirements.
• The POWER/TRANSMIT indicator lights green.
Be sure to connect the power adapter last.
NOTE:
to the MIC
connector
DIMENSIONS AND INSTALLATION
• Dimensions (approximate)
110.0 mm: 4
11
⁄
in.
36.1 mm: 1
32
SM-25 stand
microphone
HM-152 hand
microphone
3.2 mm:
1
⁄
in. (mounting hole diameter)
8
INFORMATION
The following problems may occur, depending on
the PC's sound card.
• If the [PTT] switch on the microphone, or the
external switch does not work, disable the
Filtering function of the sound card.
• If the CT-23 produces a disturbing noise,
disable the Mic boost of the sound card.
L For setting details, refer to the manual that
comes with the sound card or PC.
SPECIFICATIONS
HM-152*
SM-25*
• Power Supply voltage: 12 V DC
(supplied from the power adapter)
• Operating temp range: 0˚C to 40˚C
(32˚F to 104˚F)
• Relative humidity:
5% to 95%
• Weight (approximate):
93 g (3.28 oz)
• Length of the audio cable (approximate):
1 m (3.28 ft)
All stated specifications are subject to change without notice or obligation.
Icom, Icom Inc. and Icom logo are registered trademarks of Icom Incorporated (Japan) in Japan, the United States,
the United Kingdom, Germany, France, Spain, Russia, Australia, New Zealand, and/or other countries.
NXDN is a trademark of Icom Incorporated and JVC KENWOOD Corporation.
dPMR and the dPMR logo are trademarks of the dPMR MoU Association.
1-1-32 Kamiminami, Hirano-ku, Osaka 547-0003, Japan.
Mount the CT-23 onto a solid flat surface using
the 2 supplied screws through the mounting
13
⁄
in.
32
holes.
EXT-CTRL CONNECTOR
The PTT or Monitor function is activated when
the PTT or Monitor control line is connected to
the ground.
L Information
• The monitor function is activated when the
MONITOR switch is closed.
• To control the monitor function from the external
switch, connect the specified microphone to the
CT-23.
Specifications
Open terminal voltage
3.3 V DC
Terminal current when ON 1 mA (maximum)
One-touch
Connector type
terminal (3 poles)
L Use wires with diameter of 0.4 to 1.2 mm:
1
⁄
to
3
⁄
inches.
64
64
GND
(Common)
MONITOR
A-6775D-1EX-q
© 2009–2017 Icom Inc.
PTT
Printed in Japan
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