Datasheet

Studio Technologies, Inc. Model 373A Intercom Beltpack, Issue 1, Page 3
channel only connects to the 3.5 mm 4-conductor TRRS jack
(Headset B).
Ethernet Data and PoE
The Model 373A connects to an Ethernet data network using a
standard 100 Mb/s twisted-pair Ethernet interface. The physi
-
cal interconnection is made by way of a Neutrik® etherCON
RJ45 receptacle. While compatible with standard RJ45 plugs,
etherCON allows a ruggedized and locking interconnection
for harsh or high-reliability environments. An LED displays the
status of the network connection.
The Model 373A’s operating power is provided by way of the
Ethernet interface using the 802.3af Power-over-Ethernet (PoE)
standard. This allows fast and efficient interconnection with the
associated data network. To support PoE power management,
the Model 373A’s PoE interface reports to the power sourcing
equipment (PSE) that it’s a class 1 (very low power) device.
Future Capabilities and Firmware
Updating
The Model 373A was designed such that its capabilities and
performance can be enhanced in the future. A USB connector,
located on the unit’s main circuit board (underneath the unit’s
cover), allows the application firmware (embedded software) to
be updated using a USB flash drive.
The Model 373A uses Audinate’s Ultimo™ integrated circuit to
implement the Dante interface. The firmware in this integrated
circuit can be updated via the Ethernet connection, helping to
ensure that its capabilities remain up to date.
Model 373A 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)
Specifications subject to change without notice.
Studio Technologies, Inc.
Skokie, Illinois USA
© by Studio Technolog
ies, Inc., April 2019
studio-tech.com