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GENERAL
The Audiocom
®
IFB-1000 is a one-channel listen only IFB belt pack.
OPERATION
SYSTEM POWER
The IFB-1000 belt pack receives power externally, via the intercom
channel.
IFB-1000 SETUP
The channel termination is set for balanced operation, which is compat-
ible with other Audiocom equipment.
The headset/earset jack is set for 150 ohm operation.
EXTERNAL CONNECTIONS & CONTROLS
1 2
4
HEADSET
3
IFB-1000
1. Volume Control.
Use this control to adjust the headset/earset listen level.
2. On Indicator
This LED glows green when the belt pack is connected to an intercom
channel that is functioning.
3. Headset Connector
This connector accepts a wide-response earset, such as the Telex
EMV-2 (catalog number 60194-001), with a 1/4” monaural phone plug.
4. Intercom Channel Connectors
The IFB-1000 intercom channel is connected via a 3-pim female
connector. The IFB-1000 is powered from the intercom system power
supply and will turn on with the intercom system.
CONNECTOR PIN CONFIGURATIONS
HEADSET CONNECTOR
Type: 1/4” Monaural Plug
Sleeve Headset audio low
Tip Headset audio high
INTERCOM CHANNEL CONNECTORS
Type: XLR-3F
Pin 1 Common
Pin 2 Intercom audio and +24 VDC input
Pin 3 Intercom audio and +24 VDC input
SPECIFICATIONS
GENERAL:
Channel Supplied Power Requirements:
+24 VDC nominal (standard Audiocom line), 50 to 80 mA
Environmental Requirements:
Storage: -20°C to 80°C; 0% to 95% humidity, non-condensing
Operating: 0°C to 50°C; 0% to 95 % humidity, non-condensing
Dimensions:
3.25” (82.6 mm) H x 3.5” (88.9 mm) W x 1.8” (45.7 mm) D
Weight:
1.0 pounds (0.45 kg)
INTERFACE REQUIREMENTS:
Earset:
150 to 600 ohm headphones
Balanced Intercom Channel Level & Impedance:
1 Vrms nominal; 300 ohms ±5%
Noise Contribution:
Less than -60 dB on the line.
HEADPHONE AMPLIFIER:
Voltage Gain:
27 ±3 dB from the line
Maximum Output:
60 mW into 150 ohms
Frequency Response:
200 Hz to 8 kHz +1/-3 dB