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Summary of Contents for Studio Technologies 381
- Page 1 Model 381 On-Air Beltpack User Guide Issue 4, March 2021 This User Guide is applicable for serial numbers M381-00151 and later with application firmware 2.1 and later Copyright © 2021 by Studio Technologies, Inc., all rights reserved studio-tech.com 50663-0321, Issue 4...
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Page 3: Table Of Contents
Table of Contents Revision History ............4 Introduction ..............5 Getting Started ............. 8 Operation ..............14 Technical Notes ............19 Specifications ............... 23 Appendix A ..............24 Model 381 User Guide Issue 4, March 2021 Studio Technologies, Inc. Page 3... -
Page 4: Revision History
Documents revisions and additions to talkback button modes. Issue 2, March 2020: • Revised nomenclature associated with operation of talkback button. Issue 1, January 2019: • Initial release. Issue 4, March 2021 Model 381 User Guide Page 4 Studio Technologies, Inc. -
Page 5: Introduction
P48 and is virtually “click-free.” phantom power, headphone signal routing, Figure 1. Model 381 On-Air Beltpack top and bottom views Model 381 User Guide Issue 4, March 2021 Studio Technologies, Inc. - Page 6 Setup and Operation plugs, etherCON allows a ruggedized and locking interconnection for harsh or high- Set up and operation of the Model 381 is reliability environments. The Model 381’s simple. An etherCON® RJ45 jack is used operating power is provided by way of the to interconnect with a standard twisted-pair Ethernet interface using the 802.3af Power-...
- Page 7 44.1, 48, 88.2, and 96 kHz with This allows the Model 381 to match the out- a bit depth of up to 24. The audio signal, put sensitivity of a range of handheld and now in the digital domain, routes through a headset-associated microphones.
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Page 8: Getting Started
Ethernet Firmware Updating data interface and power for the Model The Model 381 was designed so that its ca- 381’s circuitry. A 10BASE-T connection is pabilities and performance can be enhanced not sufficient as Dante does not support in the future. - Page 9 (input) channels. This achieves routing the lead is connected to the positive terminal Model 381’s two output audio channels to the of the transducer and the sleeve lead is device (or devices) that will be “listening” to connected to the negative or common lead them.
- Page 10 Choices are 36 dB, 42 dB, 48 dB, 54 dB, area network (LAN) and subnet as the and 60 dB. Model 381 unit or units that are to be The gain of the Model 381’s microphone configured. Immediately after starting...
- Page 11 Choices are Ch 1 Level / Ch 2 Level, is distinct and careful selection will help op- Ch 1 & 2 Level / Balance, and Ch 1 & 2 timize the Model 381’s operation for a range Level / Sidetone Level. of applications.
- Page 12 Dante to adjust the balance of the channel levels. audio input channels. But if a “mix-minus” is being supplied to the Model 381 then hav- If the Headphone Output – Routing configu- ing one of the sidetone modes enabled can...
- Page 13 Sidetone audio can also active. Upon power being initially applied to be disabled by selecting the Off choice. Se- the Model 381 the talkback function will be lecting Off is useful for applications such as inactive, audio will be present on the Dante when user microphone audio (a “full mix”)
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Page 14: Operation
Model is to be used for “on-air” or other primary 381 the talkback function will not be ac- purposes. Any processing of audio coming tive and no audio will be sent to the Dante from the main output channel would need talkback output channel. - Page 15 Initial Operation tom panel, will slowly flash green. After a few seconds this LED identification pattern The Model 381 will start to function as soon will cease and normal Model 381 talkback as a Power-over-Ethernet (PoE) power button LED and Dante status LED operation source is connected.
- Page 16 The position of the controls is phone input connector. It is labeled COMP recognized by the Model 381’s processor and displays the status of the microphone which then adjusts the actual signal level audio compressor function.
- Page 17 2 input Fixed Sidetone Level configuration, will be audio signal as it is sent to both the left sent to the left headphone output channel. Model 381 User Guide Issue 4, March 2021 Studio Technologies, Inc. Page 17...
- Page 18 Sidetone Function Activity Talkback Button The Model 381’s sidetone function is used The manner in which the talkback push- to send post-compressor microphone audio button impacts the Model 381’s operation...
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Page 19: Technical Notes
IP Address Assignment output channel. When the talkback button is being pressed its LED will be lit green and By default, the Model 381’s Ethernet inter- audio won’t be sent out the Dante talkback face will attempt to automatically obtain an output channel. - Page 20 For example, in Windows ernet cable. Upon application of PoE power OS the arp –a command can be used to the Model 381 will not go through its normal display a list of LAN information that in- power-up sequence but instead will display cludes MAC addresses and corresponding the firmware version.
- Page 21 Model A selection in the STcontroller software ap- 381, the name of the zip file itself will in- plication allows the Model 381’s application clude the file’s version number. For exam- firmware version to be identified.
- Page 22 MODEL 381 ON-AIR BELTPACK Ultimo Firmware Update 5. After a few seconds the Model 381 will run a “boot loader” program that will As previously discussed in this guide, automatically load the new application the Model 381 implements Dante con- firmware file (m381.bin).
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Page 23: Specifications
Headphone Output: ¼-inch 3-conductor jack (post-compressor) Ethernet: Neutrik etherCON RJ45 Number of Receiver (Input) Channels: 2 USB: type A receptacle (located inside Model 381’s Description of Receiver Channels: headphone enclosure and used only for updating firmware) channel 1 and headphone channel 2 Configuration: uses Studio Technologies’... - Page 24 MODEL 381 ON-AIR BELTPACK Appendix A STcontroller default Model 381 configuration values: Microphone Input – P48 Phantom: Off Microphone Input – Gain: 42 dB Headphone Output – Routing: Dual-Channel Stereo Headphone Output – Controls (A/B): Ch 1 Level / Ch 2 level Headphone Output –...
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