Owner`s manual

page 12 – 2

RD-12 / March 99

INTERCOM MODULE

Intercom Module

(ICMD-5; optional)

Module Overview

The ICMD-5 Intercom Module is used to communicate with other

studios and locations within a broadcast facility. It is designed to

interface with other Wheatstone consoles and rackmount intercom

units. Up to eight different stations may be connected via a simple

daisy-chain hookup. The system is a party line; power for various units

can come from their own locations or from other units. A red BUSY

LED lights up whenever the system is in use.

The eight station call buttons on the lower half of the module are

used to initiate a call; when you press a call button, the button

corresponding to your location will illuminate at the other end to let the

receiver know who’s calling. He can then reply immediately, hands-

free, and you will hear him through your console’s cue speakers.

Normally you hear callers over your console’s cue speakers. However

you can also program the ICMD-5 module (via an internal dipswitch) to

perform a cue interrupt function. The caller’s voice will then appear at the

control room speakers and/or operator headphones, depending on how you

have programmed your CRD-5 module to handle CUE.

As the default mode for the system is hands-free reply, a red

PRIVACY button is provided to prevent potential eavesdropping.

When activated you can hear incoming calls but your own microphone

remains off until you disengage the button.

Your microphone signal can tap from the console’s talkback bus,

where it picks up the regular console operator’s microphone, or it can

be a separate line level input coming into the ICMD-5 module (inter-

nally programmable). In either case, a recessed MIC trimpot at the top

of the module sets the level of your voice.

Right next to the MIC trim is a NULL trimpot. This is used to null out

your own microphone signal at your location. It is initially set at the factory

for a two-station system. However, system loading will vary depending on

configuration, and some adjustment may be necessary during initial set-up

at your location. Once set however (assuming you don’t change the number

of stations installed) this control can be left alone.

All wiring to and from the ICMD-5 module takes place at 12-pin

AMP type connectors mounted directly beneath the module on the

console mainframe’s bottom pan. There are four connectors: AMP A

and B (towards the console meterbridge) handle inputs; AMP C and D

connector (near the console armrest) outputs.

BUSY