Telex audiocom IC-4M REV A User Manual
r
a
Telex
User Instructions
AUDIOCOM@
MODEL IC-4M
MASTER STATION
TELEX.
TELEX COMMUNICATIONS, INC. 9600 Aldrich Ave.
381 09-31
5
Rev
A
So.,
Minneapolis, MN 55420 U.S.A.
June
1991
GENERAL INFORMATION
GENERAL DESCRIPTION
The Telex Audiocom'" Model IC-4M is a fourchannel master intercom station designed for
balanced-line operation. It features light
signaling, stage announce (public address)
output, auxiliary program input, and IFB
operation. It is also compatible with the Telex
Model IC-4SX System Expander.
The IC-4M is equipped with an internal power
supply capable of powering up to 150 remote
stations. It is rack-mountable in single or dual
configurations.
OPERATING FEATURES
FRONT PANEL
The front panel has a 4-pin XLR connector for a
dynamic-microphone headset. A 3-pin connector
is also provided for a condenser-type gooseneck
microphone which can be used with an external
speaker connected at the rear panel. Separate
volume controls are provided for headset and
speaker. A three-position rocker switch is used
for microphone
signaling. A momentary-type stage announce
push-button switch allows the station operator to
page or make public address announcements
through an exernal PA system.
on/off switching and for call light
volume control adjusts the auxiliary input level. A
3-pin XLR receptacle connector provides a
balanced, transformer-coupled stage announce
output. A 9-pin D-type connector provides
system buss connection for an IC-4SX System
Expander.
The IC-4M has an integral power cord for ac
operation, and the main power fuse is accessible
on the rear panel.
SPECIFICATIONS
Interface Requirements:
-
Dynamic Headset: 50-600 ohm microphone;
150-600 ohm headphones
-
Condenser Microphone: 6.8K ohm, -55 dB
sensitivity (typical)
-Speaker:
-Auxiliary Program Source: 100 mV-10 Vrms
-
Channel Level: 1 Vrms (0 dB) nominal
-
Impedance: Supplies 300 ohms termination to
channel
Power Supply:
-
Output Voltage: 25V regulated
-Output Current: 500
per channel; 2 amp maximum continuous total
Power Requirements:
maximum (may be modified for 220V or 240V
operation)
&ohm, 5W
mA maximum continuous
120V, 50-60 Hz, 90W
Channel select
momentary-type push-button IFB switches, and
call indicator lights are provided for each
channel. The channel-select switches indicate
the "on" state by displaying a color bar. A
type power off/on switch is provided along with
an LED to indicate "power on".
REAR PANEL
A
1M-inch (6.35 mm) phone receptacle
connector accepts an external speaker (8 ohms
minimum). A 3-pin XLR connector and a
receptacle connector for each intercom channel
permit loop-through connection of intercom
channels.
A 3-pin XLR receptacle connector accepts either
balanced or unbalanced, line-level auxiliary
program input. A rotary switch assigns the
auxiliary program to one or all intercom channels
and also has an "off" position. An auxiliary
on/off push-button switches,
rocker-
Headphone Amplifier:
-
Maximum Output: 12V p-p into 150 ohms (120
mW); 21V p-p into 600 ohms (90 mW)
-Frequency Response (Channel to Phones): 200
Hz-7 kHz
-
Voltage Gain (Channel to Phones): Adjustable
from 0-26 dB
-
Sidetone: Adjustable from 25 dB null to full-on
Speaker Amplifier:
-
Maximum Output: 3W into 8 ohms at 1% THD
-
Voltage Gain (Channel to Speaker): Adjustable
from 0-34 dB
Auxiliary Amplifier:
-
Input Impedance: 50K ohms balanced; 25K
ohms unbalanced
-
Frequency Response (Auxiliary to Channel):
150 HZ-10
-Voltage Gain (Auxiliary to Channel):
Adjustable from
onset of AGC limiting)
-
Common Mode Rejection: 40 dB
kHz
0-30 dB (measured before
SPECIFICATIONS (CONT)
Connectors:
-
Headset Input: One XLR-4M
-
Condenser Mic: One 3-pin male
-
Auxiliary Input: One XLR-3F
-
Stage Announce (PA Output): One XLR-3F
-
Intercom Channels: One XLR-3M and one
XLR-SF wired in parallel for each channel
-
Speaker: One IN-inch (6.35 mm) phone jack
-Ac Power: One 6-foot (1.8 m) line cord with
3-pin U.S. grounding plug
DIMENSIONS
Ambient Temperature Range:
(0"-50"
Weight:
Dimensions:
8-1/4 inches (210 mm) wide x 11-1/4 inches
(286 mm) deep
Safety Approval:
C)
10 Ibs 2 oz (4.6 kg)
3-1/2 inches (89 mm) high x
UL
and CSA listed
32"-122" F
3-
(8
STAND-ALONE UNIT
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