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Summary of Contents for Studio Technologies 374A
- Page 1 Model 374A Intercom Beltpack User Guide Issue 5, March 2021 This User Guide is applicable for serial numbers M374A-04001 and later with application firmware 2.1 and later Copyright © 2021 by Studio Technologies, Inc., all rights reserved studio-tech.com 50658-0321, Issue 5...
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Page 3: Table Of Contents
Table of Contents Revision History ............4 Introduction ..............5 Getting Started .............. 8 Operation ..............14 Technical Notes ............. 20 Specifications ..............24 Appendix A ..............25 Model 374A User Guide Issue 5, March 2021 Studio Technologies, Inc. Page 3... -
Page 4: Revision History
1. Documents revision to STcontroller (version 2.02.00 and later) which separates microphone power and microphone gain configuration. Issue 2, April 2019: 1. Documents new receive and send call function. Issue 1, June 2018: 1. Initial release. Issue 5, March 2021 Model 374A User Guide Page 4 Studio Technologies, Inc. -
Page 5: Introduction
374A’s enclosure is made from an alumi- amplifier gain, talk button operation, call num alloy which offers both light weight Figure 1. Model 374A Intercom Beltpack top and bottom views Model 374A User Guide Issue 5, March 2021 Studio Technologies, Inc. - Page 6 24 with a sampling rate sidetone creation are performed within of 48 kHz. The Model 374A is AES67 the digital domain. This provides flexibility, compatible and compliant with the Dante allowing for precise control of the audio Domain Manager™...
- Page 7 Configuration Flexibility left and right headphone channels. This flexibility allows a variety of listening envi- A highlight of the Model 374A is its abil- ronments to be created, including stereo, ity to be easily configured to meet the single-channel monaural, and dual-channel needs of specific users and applications.
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Page 8: Getting Started
MODEL 374A INTERCOM BELTPACK The Model 374A’s operating power is pro- on the bottom of the Model 374A’s enclo- vided by way of the Ethernet interface using sure. An Ethernet data connection with the 802.3af Power-over-Ethernet (PoE) stan- Power-over-Ethernet (PoE) capability will dard. - Page 9 Headset Connection Monaural (single-earpiece or “single muff”) headsets should be wired such that its The Model 374A provides a 5-pin female headphone is wired only to pin 4; pin 5 XLR connector that interfaces with the should be remain unused. Configuration...
- Page 10 (Rx) channels. This achieves rout- as appropriate for the specific application. ing the Model 374A’s four talk output audio Model 374A Configuration channels to the device (or devices) that will be “listening” to them. Within Dante Con- Many of the Model 374A’s operating...
- Page 11 If the headset has an electret microphone same local area network (LAN) and subnet that requires a source of low-voltage DC as the Model 374A unit or units that are to power for operation enable the Electret be configured. Power check box. If the associated head-...
- Page 12 INTERCOM BELTPACK When a dynamic microphone is con- choice. The three options provide flexibility nected to the Model 374A the 42 dB gain in how the audio sources are presented setting may be correct for many applica- to the user. When using a stereo (“double tions.
- Page 13 Phones Tap to Latch, and Call (button 4 nel. This is an interesting mode, allowing only). one or more Model 374A audio channels This configuration section allows indepen- to serve in a “monitor mixer” function. The dent selection of how the four buttons will button will allow quick on/off control while function.
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Page 14: Operation
If the configuration is selected for At this point everything should be ready Solid then a button’s LED will light orange and Model 374A operation can commence. when a call signal is detected; it will light An Ethernet connection with Power-over-... - Page 15 (timing reference) is being received. It will slowly flash green when Initial Operation this specific Model 374A is serving as the Leader clock for the network. It’s possible The Model 374A will start to function that up to 30 seconds may be required for as soon as a Power-over-Ethernet (PoE) the SYNC LED to reach its final state.
- Page 16 Dante audio Four rotary potentiometers (“pots”), output (transmitter) channel. The button’s located on the Model 374A’s top panel, green LED will light to indicate that the allow individual adjustment of the level of output is active. The button will not be lit the four audio input signals as they are when the function is not active.
- Page 17 Sidetone Function are active. The button functions in a push- to-call manner and will light orange when- The Model 374A includes a sidetone func- ever it is pressed and held. No microphone tion that sends microphone audio to both audio will be routed to audio output 4. But-...
- Page 18 Model 374A and BP-325 units using an appropriate Dante-enabled interface, General such as the Studio Technologies’ Model The Model 374A includes a call function that 45DR Intercom Interface, call signaling allows users, and users of compatible equip- is fully compatible. Compatibility with the ment, to signal each other.
- Page 19 Send Mic Kill Function The Model 374A allows a call signal to be The Model 374A includes a mic kill function, sent on channels 1, 2, and 3. This requires allowing talk buttons that have been placed that button 4 be configured to the Call...
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Page 20: Technical Notes
MODEL 374A INTERCOM BELTPACK the Model 374A will respond to any such a slight latency (delay) in the data flow. request and force all talk channels to their And an Ethernet switch will provide this. disabled state. While this is certainly an anomaly, since PoE power is required for Model 374A operation it’s highly unlikely that an ap-... - Page 21 Model 374A’s proper Dante operation. application firmware version to be identi- fied. Connect the Model 374A unit to the Application Firmware Version network and let it connect and start to func- Display tion.
- Page 22 firmware. Once the USB flash drive is inserted into the USB interface, located on the main 6. At this time the Model 374A is operat- circuit board under the cover, the unit ing under the newly saved application must be powered off and again powered firmware and the USB flash drive can...
- Page 23 firmware (embedded software) that re- Then click on the OK box. Refer to Appen- sides in the Ultimo “chip.” The STcontroller dix A for a list of the Model 374A’s factory software application can also be used to default values.
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Page 24: Specifications
(–18.5 dBFS) Slope: 2:1 Mounting: intended for portable applications; contains integral belt clip; optional MBK-01 Status LED: compressor active Mounting Bracket Kit allows Model 374A to be Headphone Output: permanently mounted Type: 2-channel Weight: 0.6 pounds (0.3 kg) Compatibility: intended for connection to ste-... - Page 25 MODEL 374A INTERCOM BELTPACK Appendix A STcontroller default Model 374A configuration values: Microphone Input – Electret Power: Off Microphone Input – Gain: 42 dB Headphone Output – Channel 1 Input Routes to: Left Headphone Output – Channel 2 Input Routes to: Right Headphone Output –...
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