D
FRONT VIEW
q
FREQUENCY UP/DOWN SWITCHES
[UP]/[DOWN]
Push to change the frequency.
• Pushing and holding the switch chang-
es the frequency continuously.
w
LOW CUT SWITCH [LOW CUT]
Push to cut out the low frequency com-
ponents of input voice signals.
e
PTT SWITCH [PTT]
Push to transmit, then release to re-
ceive.
r
PTT LOCK SWITCH [LOCK]
Push to transmit continuously. The
transmission continues until pushing
this switch again.
INSTRUCTIONS
DESKTOP MICROPHONE
SM-50
Thank you for purchasing the
SM-50
desktop
microphone
. This is a unidirec-
tional, dynamic microphone designed
for base station operation with an Icom
transceiver.
Please read these instructions thorough-
ly before using the microphone.
PRECAUTIONS
R
NEVER expose the microphone to rain,
snow or any liquids.
R
NEVER let metal, wire, etc. touch any in-
ternal part of the microphone.
R
NEVER touch or operate the desktop mi-
crophone with wet hands.
DO NOT place the microphone in exces-
sively dusty
environments or in direct sun-
light.
Place the microphone in a secure place to
avoid inadvertent use by children.
This microphone is for Icom transceiv-
ers only!— The microphone cannot be
used with a non-Icom transceiver since
the power is supplied from the connected
transceiver.
About CE
The SM-50 complies with the essen-
tial requirements of the 2004/108/
EC directive for Electromagnetic
Compatibility.
• Microphone type
: Unidirectional dynamic microphone (preamp built-in)
• Output impedance
: 55
Ω
±30% (at 1 kHz)
• Sensitivity
: –30 dB ±4 dB (at 1 kHz, 0 dB=1 V/Pa)
• Power requirements
: 5–10 V DC (supplied from the transceiver)
• Cable length (approx.)
: 1000 mm; 3 ft 3
3
⁄
8
in
• Weight (approx.)
: 730 g; 26 oz
All stated specifications are subject to change without notice or obligation.
1-1-32 Kamiminami, Hirano-ku, Osaka 547-0003, Japan
A-6706X-1G-
q
Printed in Japan
© 2008 Icom Inc.
PART NAMES AND FUNCTIONS
Icom, Icom Inc. and the Icom logo are registered trademarks of Icom Incorporated (Japan) in the United
States, the United Kingdom, Germany, France, Spain, Russia and/or other countries.
SPECIFICATIONS
D
BOTTOM VIEW
t
MIC GAIN VOLUME [MIC GAIN]
Rotate to adjust the microphone output
level.
• Use this control as an adjunct to the
microphone gain setting of the con-
nected transceiver.
Rotating the control too far clockwise
may result in over-modulation and
transmit signal distortion.
D
PLUG PIN ASSIGNMENTS
The pins are described from the direction of the arrow in the illustration.
MIC GAIN
t
y
GND (PTT ground)
t
PTT
r
No connection
q
Microphone output
w
5–10 V DC input
e
Frequency up/down
u
GND (Microphone ground)
i
No connection
q
e
w
r