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Model 374 Intercom Beltpack
User Guide
Issue 2, September 2016
This User Guide is applicable for serial numbers
M374-00151 and later with application firmware 1.3 and later
and Dante firmware 2.0 (Ultimo 3.10.1.12) and later
Copyright © 2016 by Studio Technologies, Inc., all rights reserved
www.studio-tech.com
50627-0916, Issue 2
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Summary of Contents for Studio Technologies 374
- Page 1 Issue 2, September 2016 This User Guide is applicable for serial numbers M374-00151 and later with application firmware 1.3 and later and Dante firmware 2.0 (Ultimo 3.10.1.12) and later Copyright © 2016 by Studio Technologies, Inc., all rights reserved www.studio-tech.com 50627-0916, Issue 2...
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Page 3: Table Of Contents
Table of Contents Revision History ............4 Introduction ..............5 Getting Started .............. 7 Operation ..............15 Technical Notes ............. 18 Specifications ..............21 Model 374 User Guide Issue 2, September 2016 Studio Technologies, Inc. Page 3... -
Page 4: Revision History
Revision History Issue 2, September 2016: 1. Revised to show support for 44.1 and 48 kHz sampling rates. Issue 1, August 2016: 1. Initial release. Issue 2, September 2016 Model 374 User Guide Page 4 Studio Technologies, Inc. -
Page 5: Introduction
Careful circuit design and rugged com- sidetone, remote talk channel turn off ponents ensure long, reliable operation. (“mic kill”), and monitor only modes. This Figure 1. Model 374 Intercom Beltpack top and bottom views Model 374 User Guide Issue 2, September 2016 Studio Technologies, Inc. - Page 6 Model 374. Not only will it cause the talk button LEDs to light A highlight of the Model 374 is its ability in a unique highly visible sequence, it will to be easily configured to the meet the also turn off any active talk channels.
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Page 7: Getting Started
(PSE) that it’s a class 1 (very low power) A highly unique Model 374 feature is the device. If a PoE-enabled Ethernet port ability to individually configure the way in can’t be provided by the associated Ether-... - Page 8 RJ45 plug. A dual- or single-earpiece Headset Connection headset (stereo or monaural) will be con- nected using a cable-mounted 5-pin male The Model 374 provides a 5-pin female XLR connector. XLR connector that interfaces with the microphone and headphone connections Ethernet Connection with PoE of an intercom or broadcast-style headset.
- Page 9 Model 374’s audio a headset’s 5-pin male XLR connector inputs also need to be routed to the de- so that left and right from the Model 374 sired Dante transmitter channels. These match correctly. four audio signals will be sent to the Model 374’s 2-channel headphone output.
- Page 10 The higher to be recognized and implemented gain settings may also be useful when the Model 374 is going to be deployed at Accessing the DIP Switches and events where users are not able to speak Configure Button...
- Page 11 DIP switches, to 40 dB, it might be a good idea to change allows the Model 374 to be placed in its to setting to 43 or 46 dB. If the LED is lit software-based configuration mode.
- Page 12 flash sequences that repeat continuously. exited. Once the configuration mode has Each button indicates how its own mode been entered normal Model 374 operation has been configured. Refer to Figure 5 for will cease. No talk audio will be sent out a description of what each flash sequence...
- Page 13 • Button flashes green three times: microphone audio from this specific Model talk disabled, no talk output on assoc- 374 is not allowed to “join” this specific iated output channel; normal audio intercom channel. monitoring.
- Page 14 Inactivity Timer The choices provide flexibility in how the audio sources are presented to the user. Whenever a Model 374 is in its configure When using a stereo (“double muff”) mode an inactivity time function will be in headset it’s common for the four audio effect.
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Page 15: Operation
Dante device. The SYNC associated equipment. The Model 374’s LED will light red when the Model 374 is configuration switches should have been not synchronized with a Dante network. It set and the configuration modes selected... - Page 16 flash green. After a few seconds the LED output. However, one configuration setting identification pattern will cease and normal assigns the associated button to function Model 374 button LED and Dante status as a channel listen audio on/off selector. LED operation will resume. Compressor Active LED...
- Page 17 Sidetone Function If a button has been configured for the push to talk/tap to latch mode operation The Model 374 includes a sidetone func- is a bit different and certainly more flex- tion that sends microphone audio to both ible. Press and hold the button to activate the left and right headphone output chan- the talk function.
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Page 18: Technical Notes
The pot’s position is moni- (delay) in the data flow. And an Ethernet tored by the Model 374’s processor which switch will provide this. While this is cer- then controls the level within the digital tainly an anomaly, since PoE power is re- audio domain. - Page 19 USB interface. The Model 374 implements a USB host Application Firmware Version function that directly supports connec- tion of a USB flash drive. The Model 374’s Display MCU updates its firmware using a file As part of the Model 374’s power-up named m374.bin.
- Page 20 LEDs associated with the 6. At this time the Model 374 is function- channel 1 and channel 2 talk buttons ing with the newly-loaded application should be used to confirm that the desired firmware and the USB flash drive can application firmware version has been...
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Page 21: Specifications
Type: unbalanced, for use with dynamic contains integral belt clip; optional mounting microphones adapter kit allows Model 374 to be permanently Gain: 34, 40, 43, or 46 dB, selectable, ref. –60 dBu mounted input to Dante output (–20 dBFS nominal) Weight: 0.6 pounds (0.3 kg)
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