StudioTech 233 manual LED Colors, Travel Case, Additional Connectors

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LED Colors

As previously described, two LED indica- tors are associated with the main output and are located directly above the main output pushbutton switch. The red LED, located on the left, is lit whenever the main output is muted. The green LED, located on the right, is lit whenever the main output is active. The thought pro- cess behind the color choices was that red would relate to the main output being muted (“stop”) while green would relate to the main output being active (“go”). It’s possible that these color choices may not meet the needs of all users and applica- tions. For example, it’s reported that one European broadcaster typically uses these two colors in the opposite fashion. Their choice is to have the red LED lit whenever the main output is active, warning the tal- ent that they are “on-air.” The green LED is lit whenever the main output is muted, indicating to the talent that it’s “safe” to say whatever they wish, about whomever they wish to say it about!

For consistency, the LED associated with each talkback button was selected to be green. They light whenever their associ- ated talkback output is active. It’s possible that some applications may benefit from revising these LED colors too. While red is certainly one possible choice, other col- ors are also a possibility including amber, orange, or blue—these days there are lots of choices available. The only limitation is the amount of current available to light each LED. Using series resistors of no less than 560 ohms will ensure correct Model 233 operation.

A qualified technician can easily revise the LED colors to meet an application’s exact needs. The process would begin by disas- sembling the Model 233’s enclosure and

detaching the pushbutton/LED printed circuit board assembly. The LEDs would then be unsoldered, removed, and rein- stalled (or replaced) in the desired loca- tions. To control the LED current and set the brightness, a resistor is electrically in series with each LED. An 820 ohm, ¼-watt resistor is associated with the red LED while a 560 ohm, ¼-watt resistor is associ- ated with each green LED. These resis- tors would also have to be unsoldered, removed, and reinstalled. Then the unit would be reassembled and tested to con- firm that the changes function as desired. For additional information about chang- ing the LED colors, please contact Studio Technologies’ technical support.

Travel Case

For portable applications it may be desir- able to store and transport each Model 233 in a protective case. After much travel with prototype announcer console units, Studio Technologies personnel learned to appreciate the Pelican Model 1450 case. Purchased with the foam interior option, it does an excellent job of holding one Model 233, its associated 24 volt DC power supply, and documentation. Some applications may benefit from selecting a larger case that would also hold a related headset, cables, etc. A larger case could also be selected that would hold multiple Model 233 units. Pelican sells their prod- ucts through a dealer network, many of which can be located via a web search.

Additional Connectors

Three spare connector locations are provided on the Model 233’s back panel. From the factory they contain blank plates that can be readily removed and replaced with a variety of XLR-type con- nectors. These spare connector locations

Model 233 User Guide

Issue 1, September 2007

Studio Technologies, Inc.

Page 39

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Contents User Guide This page intentionally left blank Table of Contents Issue 1, September Model 233 User Guide Introduction What This User Guide CoversSystem Overview Talkback Functions System FeaturesMicrophone Input Main OutputUser Controls and Status Indicators Dynamic Range ControlFlexibility Sidetone Cue SourcesHeadphone Output Auxiliary Relay Power SourcesIntercom Interface Audio Quality and ProtectionMulti-Pin Headset Connectors ConfigurationConnectors Additional Connector LocationsInstallation and Setup OptionsSystem Components Headphone Output Line-Level Talkback Outputs Line Inputs External Power Input Pushbutton Labeling ConfigurationMicrophone Preamplifier Gain Microphone Preamplifier Gain and Phantom PowerHeadphone Source Selection Phantom Power On/OffLeft and right channel headphone source selection settings Headphone output mode settings Headphone Output ModeOperating Modes Main Output Button ModeTalkback 1 Button Mode Talkback 2 Button ModeTalkback 1 Button Function Sidetone Mode Talkback 2 Button FunctionMain Output Source Dual-Channel or Stereo Mode Reverse Left/Right ModeHeadphone Output Operating Modes Main Button Mode Minimum Level ModeSystem Mode Relay ModeConclusion Talkback 1 to Intercom Function ModeTalkback 2 to Intercom Function Mode OperationPushbutton Switches and Status LEDs Main Output Button and LED IndicatorsMain Output Button Modes Talkback Output 2 Button Modes Talkback 1 Button and LED IndicatorTalkback 2 Button and LED Indicator Talkback 1 Button ModesLevel/Balance Mode Level/Level ModeSidetone Operation Monaural Headphone Output Level Control OperationAdvanced Operation Adjusting the Line Input Trim PotsIntercom Interface Sidetone Adjustment Technical NotesGrounding and Shielding Intercom Audio Levels Intercom Channel CrosstalkConnecting an IFB Circuit External Power Sources Phantom PowerSymptoms of Insufficient Power Additional Connectors LED ColorsTravel Case Issue 1, September Model 233 User Guide Pushbutton Backlighting P18 Remote Control/Tally ConnectionsP19 Compressor CircuitGeneral Audio SpecificationsAppendix a
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