Copyright © 2013 by Studio Technologies, Inc., all rights reserved
www.studio-tech.com
50127-1213, Issue 2
User Guide
Issue 2, December 2013
This User Guide is applicable for serial numbers M42A-01051 and later
Page 1: ...pyright 2013 by Studio Technologies Inc all rights reserved www studio tech com 50127 1213 Issue 2 User Guide Issue 2 December 2013 This User Guide is applicable for serial numbers M42A 01051 and late...
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Page 3: ...e Issue 2 December 2013 Studio Technologies Inc Page 3 Table of Contents Introduction 5 Installation 8 Post Installation 12 Operation 13 Troubleshooting 16 Technical Notes 18 Speci cations 22 Appendix...
Page 4: ...Issue 2 December 2013 Model 42A User Guide Page 4 Studio Technologies Inc This page intentionally left blank...
Page 5: ...tors The compact one rack space package is constructed using rugged steel and aluminum components Figure 1 Model 42A Interface front and back views The unit s AC mains power input can range from 100 t...
Page 6: ...of two audio inputs and a 2 channel wet IFB output The audio inputs are transformer coupled have a nominal level of 4 dBu and are compatible with balanced or unbalanced sources In on air television b...
Page 7: ...that optimal IFB performance can be achieved A headphone output is also pro vided allowing real world checking of IFB audio quality In addition to being able to manually select the IFB output to be mo...
Page 8: ...l be interfaced using four 3 pin XLR connectors AC mains power will be connected by means of a detachable cord that is compatible with the Model 42A s 3 pin IEC 320 C14 inlet connector System Componen...
Page 9: ...other broad cast applications such as live radio it s Figure 2 Detail of back panel showing 25 pin D subminiature connector used for audio inputs possible that a stereo cue source will be connected In...
Page 10: ...f 220 milliamperes The audio superim posed on the DC power has a nominal signal level of 10 dBu Its audio source is the channel 1 audio input associated with that speci c IFB output The audio Signal S...
Page 11: ...it also may be useful to have the IFB outputs pass through points on an audio patch bay When a Model 42A is used in an equip ment rack that will move between broad cast events it may be desirable to...
Page 12: ...minal AC mains voltage The Model 42A uses a 3 pin IEC 320 C14 inlet connector to mate with a detachable AC mains cord All units are supplied with an AC mains cord that has a North American NEMA 5 15P...
Page 13: ...isely calibrat ed system can t be easily implemented Audio Integrity At this stage the Model 42A should have been installed and the audio source levels adjusted as required The unit should now be read...
Page 14: ...pin XLR connector pair In television broadcast settings the Pin 2 left meter will typically display the inter rupt signal while the Pin 3 right meter will display program A quick glance at the meters...
Page 15: ...voltage threshold for the Model 42A s 30 volt DC output is 24 volts As discussed in the previous section the four LED indicators display which IFB channel is currently selected for audio monitoring I...
Page 16: ...uence If this does not occur con rm that AC mains power is active hot and that the cord is securely mated with the inlet connector on the Model 42A s back panel In all foreseeable situations both norm...
Page 17: ...h a 4 seconds on 10 seconds off sequence Restoring the IFB output load to be within the maximum 220 milliamperes will allow the output to again operate normally In extreme cases such as when the Model...
Page 18: ...e the DC current being drawn while normal operation of the connected device s takes place Be certain to connect the maximum number of devices that might be pow ered by the IFB output That is measure t...
Page 19: ...onductors to carry the signal pins 1 and 2 you d get 21 8 ohms per 1000 feet of cable By knowing the cable resistance value along with the minimum voltage and maximum load current re quired by an IFB...
Page 20: ...oved crosstalk gure and ease of installation and use Using two full pairs can sig ni cantly reduce crosstalk Several con nection schemes are possible the exact one selected will depend on the speci c...
Page 21: ...ent curves for the RTS 4000 series and the Model 42A Interface The performance differences are quite interesting It s interesting to note the reason why typical IFB output audio quality is less than p...
Page 22: ...udio input Pin 3 14 dBu with 28 dBu on audio input DC Current Output 220 mA maximum Monitor Section Headphone Output Type 2 channel stereo drives headphones by way of 100 ohm series resistors Compatib...
Page 23: ...2A User Guide Issue 2 December 2013 Studio Technologies Inc Page 23 Interfacing Riedel Artist Matrix Intercom Systems with the Model 42A Interface Information courtesy of Riedel Communications Inc App...
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