Icom SM-30 Desktop Microphone Instructions
Thank you for purchasing the SM-30 DESKTOP MICROPHONE. This is a unidirectional, electret microphone designed for base station operation with an Icom transceiver.
Please read these instructions thoroughly before using the microphone.
PRECAUTIONS
CAUTION: NEVER expose the microphone to rain, snow or any liquids.
CAUTION: NEVER let metal, wire, etc. touch any internal part of the microphone.
CAUTION: NEVER touch or operate the desktop microphone with wet hands.
DO NOT place the microphone in excessively dusty environments or in direct sunlight.
DO NOT use harsh solvents such as benzene or alcohol to clean the microphone, as they can damage the microphone's surfaces.
Place the microphone in a secure place to avoid inadvertent use by children.
This microphone is for the specified Icom transceivers only! The microphone cannot be used with a non-Icom transceiver since the power is supplied from the connected transceiver.
About CE
The SM-30 complies with the essential requirements of the 2004/108/EC directive for Electromagnetic Compatibility.
SPECIFICATIONS
- Microphone type: Unidirectional electret condenser microphone (preamp built-in)
- Output impedance: 600 Ω ±30% (at MIC GAIN: Max)
- Sensitivity: –28 dB ±4 dB (0 dB=1 V/Pa, at 1 kHz)
- Power requirements: 8 V DC (supplied from the transceiver)
- Cable length (approx.): 1 m; 3 ft 3½ in
- Weight (approx.): 350 g; 12.3 oz
All stated specifications are subject to change without notice or obligation.
Icom, Icom Inc. and the Icom logo are registered trademarks of Icom Incorporated (Japan) in Japan, the United States, the United Kingdom, Germany, France, Spain, Russia and/or other countries.
PART NAMES AND FUNCTIONS
TOP VIEW
The top view shows the microphone head and the base unit. The base unit features a PTT switch and a PTT lock switch.
BOTTOM VIEW
The bottom view shows the microphone's base with the MIC GAIN VOLUME control and the LOW CUT SWITCH.
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 connected transceiver.
- Rotating the control too far clockwise may result in an output level that is too high and transmit signal distortion.
LOW CUT SWITCH [LOW CUT]
Cuts out the low frequency components of input voice signals.
PLUG PIN ASSIGNMENTS
The pins are described from the direction of the arrow in the illustration. The plug has 8 pins.
- Pin 1: Microphone output
- Pin 2: 8 V DC input
- Pin 3: No connection
- Pin 4: No connection
- Pin 5: PTT
- Pin 6: GND (PTT ground)
- Pin 7: GND (Microphone ground)
- Pin 8: No connection
