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7.
(Optional) Insert the auxiliary audio feed into the AUX IN jack. See the specifications section for connector wiring
information.
8.
Connect the headset or headphone and microphone to the unit.
9.
Set the slide switch (intercom select) on the right front of the ICW-4 to the WIN position.
10.
While talking at a normal level, have an assitant monitor the ICW-3's audio output on the customer side while you
adjust the Outside Volume control on the ICW-3 until it is at an acceptable level for the assistant.
11.
Have an assistant talk at a normal level and adjust the WIN Volume control on the ICW-4 until it is at an acceptable
level in the headset or headphones.
12.
Set the slide switch (intercom select) on the right front of the ICW-4 to the CONF position.
13.
While talking at a normal level, have an assistant make appropriate adjustments to the receive audio levels for the
main intercom system.
14.
Have an assistant talk at a normal level over the main intercom system and adjust the CONF Volume control for an
acceptable level in the headset/headphone.
15.
(Optional) Set the slide switch (intercom select) on the right front of the ICW-4 to the OFF position.
16.
(Optional) Place program material of a typical level on the Auxiliary audio feed and adjust the AUX Volume control
for an acceptable level in the headset/headphone.
ICW-3
POWER
AUX
IN
TO ICW-3
IN
ICW-4
IN/OUT
INTERCOM
rear view
To Intercom
System
ICW-4
front view
POWER SUPPLY
FROM ICW-3
OPERATION
To talk to customers through the ICW-3 intercom, set the slide switch located on the right front of the ICW-4 to the WIN
position. You can use the Mute switch on the front of the ICW-3 or ICW-4 to temporarily mute the audio that the cus-
tomer hears.
To talk to others on the main intercom system, set the slide switch located on the right front of the ICW-4 to the CONF
position.
To prevent placing audio on either the ICW-3 or main intercom system, set the slide switch located on the right front of
the ICW-4 to the OFF position.
At all times, and regardless of the slide switch position, you will be able to hear the auxiliary audio feed (if present).
SPECIFICATIONS
Overall
Power Requirement:
12 to 15 VDC, 200 mA nominal (powers ICW-3 as well)
System Frequency Response: 200 to 4.5 kHz ±3 dB
Environmental:
0 to 55°C, 0 to 90% Humidity, non-condensing
Physical:
1.44" (36 mm)H x 5.27" (134 mm)W x 4" (102 mm)D; 0.88 lbs (0.4 kg)
Outputs
Headphone:
Headphone impedance: 25 ohms, 31 mW, 109 dB peak SPL,
Voice range: 84 to 109 dB SPL
Headphone impedance: 150 ohms, 15 mW, 106 dB peak SPL,
Voice range: 81 to 1096 dB SPL
Input/Output
House Intercom:
Printed circuit board switch to select:
1) RTS™ TW™, channels 1 or 2
2) AudioCom® (balanced)
3) Clear-Com™ (unbalanced, single channel)
System levels range from -10 dBu to 0 dBu into 200 to 300 ohms. Unit uses a
bilateral current source.
Input
Headset Microphone:
Dynamic or Electret range: 2 to 15 mv @ 1 kHz typical into 1000 ohms.
Source impedance dyanmic: 200 ohms. Source impedance electret: 1000 ohms.
Rear Panel
RJ45:
Interconnects to ICW-3
Phone Jack:
Minature 3.5 mm connection for Aux. In. Balanced 0 dB line level input.
Tip, Audio +; Ring, Audio -; Sleeve, N.C.
Power Connector:
DC power input, 12 to 15 volts, 150 to 200 mA. Jack: 2.5 mm, center positive.
Intercom Connector:
Connects to House Intercom line.
RTS™ TW™:
Pin 1, common; Pin 2, Channel one; Pin 3, Channel two
Clear-Com™:
Pin 1, common; Pin 2, power; Pin 3, audio
AudioCom®:
Pin 1, common; Pins 2, 3 balanced audio, phantom power
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