Data Sheet

50164-0805, Issue 1
Studio Technologies, Inc.
Skokie, Illinois USA
[phone]
studio-tech.com
The Model 34 is compatible with virtually every standard broadcast IFB and party-line intercom circuit. This type of circuit
typically uses 3-pin XLR-type connectors for interfacing with connected equipment. XLR pin 1 serves as common for
DC power and audio. Pin 2 provides DC power and, in the case of a dual-channel circuit, DC power and channel 1 audio.
Pin 3 provides channel 2 audio in dual-channel systems or channel 1 audio in single-channel systems.
Model 34 units have been tested for correct operation with IFB and intercom circuits associated with systems from RTS®,
Clear-Com®, and Studio Technologies. Good performance can be expected when the Model 34 is used with IFB circuits
associated with the ubiquitous RTS Model 4010 Central Controller and IFB-828 Interface. With IFB circuits provided by
interface units from Studio Technologies, excellent audio quality and support for lengthy cable runs can be expected.
Specifications
Applications: listen-only portable user station compatible with standard single- and dual-channel
broadcast IFB and party-line intercom circuits
Connectors:
IFB/Intercom Input: 3-pin female XLR-type
Headphone/Earpiece Output: ¼-inch and 3.5 mm 3-conductor jacks
IFB/Intercom Input:
Compatibility: broadcast-standard single- or dual-channel IFB or party-line intercom circuits
Wiring Scheme:
Pin 1: common for DC and audio
Pin 2: DC only (single-channel circuits) or DC with channel 1 audio (dual-channel circuits)
Pin 3: channel 1 audio (single-channel circuits) or channel 2 audio (dual-channel circuits)
Power Requirement:
18-35 volts DC, 20 mA nominal, 45 mA maximum with one output channel
shorted at full level
Headphone/Earpiece Output :
Compatibility: intended for connection to mono (2-conductor) or stereo (3-conductor) headsets or
earpieces with nominal impedance of 150 ohms or greater
Type: 2-channel voltage driver
Input/Output Gain: 19 dB, maximum
Audio Routing–Switch Set to Stereo Mode: channel 1 (pin 2) input to left channel output; channel 2 (pin 3)
input to right channel output
Audio Routing–Switch Set to Mono Mode: channels 1 & 2 summed (added) then routed to both left and
right channel outputs
Maximum Output Voltage: 8 Vpp, 1 kHz, 150 ohm load
Frequency Response: 40 Hz-20 kHz, ±1 dB, 150 ohm load
Distortion (THD+N): 0.03%, 1 kHz, 150 ohm load
Options : mounting adapter allows Model 34 to be permanently mounted
Dimensions (Overall):
3.25 inches wide (8.3 cm)
1.80 inches high (4.6 cm)
3.95 inches deep (10.0 cm)
Weight: 0.6 pounds (0.3 kg)
Specifications subject to change without notice.
© by Studio Technologies, Inc., August 2005