Studio Technologies Model 373A Intercom Beltpack (4-Pin Male)

About: Studio Technologies Model 373A Intercom Beltpack (4-Pin Male)

The Model 373A Intercom Beltpack is a highly compact user-worn device that combines a single channel of talk and two channels of listen. The unit begins with the features offered by traditional analog party-line (PL) intercom user devices and adds a range of new capabilities, along with the advanced performance and flexibility that Dante® audio-over-Ethernet provides. Over a standard IP network, multiple Model 373A and other compatible Studio Technologies' beltpack units can be used to create party-line intercom applications with help from an external Dante-enabled audio matrix such as the Studio Technologies' Model 5422 Dante Intercom Audio Engine. Alternately, Model 373A units can be used "point-to-point" or interfaced with Dante-compatible matrix intercom systems.

Key Features

• Dante audio-over-Ethernet technology
• One talk and two listen channels
• Supports dynamic and electret microphones
• 4-pin male XLR headset connector
• 3.5 mm 4-conductor TRRS headset connector
• Call receive and display function
• Excellent audio quality
• Uses STcontroller for configuration
• AES67 and Dante Domain Manager™ (DDM) support
• Power-over-Ethernet (PoE) powered

Specifications:

Power Source:
Power-over-Ethernet (PoE): class 1 (very low power, ≤3.84 watts) per IEEE® 802.3af

Network Audio Technology:
Type: Dante audio-over-Ethernet
AES67-2013 Support: yes
Dante Domain Manager (DDM) Support: yes
Bit Depth: up to 24
Sample Rate: 48 kHz
Number of Transmitter (Output) Channels: 1
Number of Receiver (Input) Channels: 2
Dante Audio Flows: 4; 2 transmitter, 2 receiver

Network Interface:
Type: 100BASE-TX, twisted-pair Ethernet, Power-over-Ethernet (PoE) supported
Data Rate: 100 Mb/s (10 Mb/s and 1000 Mb/s "GigE" Ethernet not supported)
Compatibility – Headset A: monaural single- or dual-ear broadcast-style with dynamic or electret (low-voltage DC-powered) microphone: pin 1 mic –/shield/screen; pin 2 mic +; pin 3 phones –; pin 4 phones +
Compatibility – Headset B: CTIA™/AHJ configuration (typically uses electret powered mic): tip phones left; ring 1 phones right; ring 2 common; sleeve mic

Audio Channels: 1 talk, 2 listen

Microphone Input:
Compatibility: dynamic or electret (low-voltage DC-powered) microphones
Type: unbalanced
Electret Microphone Power: 3.3 volts DC via 2.00 k resistor, selectable on/off
Impedance: 1 k ohms, nominal, microphone power off; 690 ohms, nominal, microphone power on
Gain: 24, 30, 36, 42, or 48 dB, selectable, ref. –60 dBu input to Dante output (–20 dBFS nominal)
Frequency Response: 40 Hz to 20 kHz, –3 dB
Distortion (THD+N): <0.02% (at minimum gain)
Dynamic Range: 91 dB of dynamic range

Compressor:
Application: applies to Dante transmitter (output) channel and sidetone audio
Threshold: 2 dB above nominal level (–19 dBFS)
Slope: 2:1
Status LED: compressor active

Headphone Output:
Type: 2-channel
Compatibility: intended for connection to stereo (dual-channel) or monaural (single-channel) headsets with nominal impedance of 50 ohms or greater
Maximum Output Voltage: 2.8 Vrms, 1 kHz, 150 ohm load
Frequency Response: 20 Hz to 10 kHz, –3 dB
Distortion (THD+N): <0.002%
Dynamic Range: >100 dB

Call Receive Function:
Implementation: monitors both Dante receiver (input) channels for presence of call signals
Signaling Method: 20 kHz, ±800 Hz, within audio channels
Call Receive Level: –27 dBFS minimum

Connectors:
Headset A: 4-pin male XLR
Headset B: 4-conductor (TRRS) 3.5 mm jack, per Japanese standard JEITA/EIAJ RC-5325A
Ethernet: Neutrik NE8FBH etherCON RJ45 receptacle
USB: type A receptacle (located inside Model 373A's enclosure and used only for application firmware updates)

Configuration: requires Studio Technologies' STcontroller software application, version 2.01.00 and later

Environmental:
Operating Temperature: 0 to 50 degrees C (32 to 122 degrees F)
Storage Temperature: –40 to 70 degrees C (–40 to 158 degrees F)
Humidity: 0 to 95%, non-condensing
Altitude: not characterized

Dimensions (Overall):
3.1 inches wide (7.9 cm)
1.5 inches high (4.0 cm) without belt clip; 1.8 inches (4.6 cm) with belt clip
4.9 inches deep (12.5 cm)

Deployment: intended for portable applications; contains integral belt clip

Weight: 0.5 pounds (0.23 kg)