Instruction/ maintenance manual of the product M45-00151 StudioTech
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Copyright © 2009 by Studio T echnologies, Inc., all rights reserved www .studio-tech.com 50216-0309, Issue Preliminary 2 User Guide Issue Preliminary 2, March 2009 This User Guide is applicable for s.
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Model 45 User Guide Issue Preliminary 2, March 2009 Studio T echnologies, Inc. Page 3 T able of Contents Introduction ................................................................... 5 Installation ..................................................
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Model 45 User Guide Issue Preliminary 2, March 2009 Studio T echnologies, Inc. Page 5 Introduction The Model 45 is designed to interface 2-wire full-duplex party-line (PL) intercom circuits with 4-wire audio circuits associ- ated with matrix intercom systems.
Issue Preliminary 2, March 2009 Model 45 User Guide Page 6 Studio T echnologies, Inc. 2- W ire P arty-Line Interface The Model 45’s two-channel 2-wire party- line interface is optimized for direct connec- tion with a dual-channel party-line intercom circuit.
Model 45 User Guide Issue Preliminary 2, March 2009 Studio T echnologies, Inc. Page 7 of its 2-wire-to-4-wire hybrid circuits. Each of the two independent circuits provides low noise and distortion, good frequency response, and high return-loss (“nulling”), even when presented with a wide range of 2-wire party-line conditions.
Issue Preliminary 2, March 2009 Model 45 User Guide Page 8 Studio T echnologies, Inc. of only 2 dB is required. The RTS ADAM™ series of matrix intercom systems has a nominal level of +8 dBu. This level also applies to their RVON-I/O V oIP products. As such, reducing their nominal input and output levels by 4 dB will ensure optimal compatibility .
Model 45 User Guide Issue Preliminary 2, March 2009 Studio T echnologies, Inc. Page 9 audio quality , advanced users might need to disable it. This would allow full control over the Model 45’s two hybrid circuits, enabling them to be used in a completely independent manner .
Issue Preliminary 2, March 2009 Model 45 User Guide Page 10 Studio T echnologies, Inc. The next step was to identify resources that would improve the installation process and make operation more reliable. This led to the use of standard 3-pin XLR-type audio connectors, enabling rapid installa- tion and troubleshooting in any locale.
Model 45 User Guide Issue Preliminary 2, March 2009 Studio T echnologies, Inc. Page 11 cables will help to ensure more reliable and consistent intercom system performance. The differential (“balanced”) 4-wire circuits are typically not impacted by the length of their interconnecting cables.
Issue Preliminary 2, March 2009 Model 45 User Guide Page 12 Studio T echnologies, Inc. Once the desired one or two Model 45 units have been installed in a rack -mount front panel, the assembly can be mounted into the designated equipment rack. One space (“1U” or 1.
Model 45 User Guide Issue Preliminary 2, March 2009 Studio T echnologies, Inc. Page 13 unbalanced source in this manner results in hum or noise, connect XLR pin 2 to high (+ or hot) and pin 3 to shield; leave pin 1 unterminated. 4- Wire Line Outputs The Model 45’s dual-channel interface pro- vides two analog line-level audio outputs.
Issue Preliminary 2, March 2009 Model 45 User Guide Page 14 Studio T echnologies, Inc. pin 3 of the Model 45’s 2-wire party-line intercom interface, will be utilized. Pin 2, the Model 45’s audio channel 1, will only be used for connecting DC power to the connected devices.
Model 45 User Guide Issue Preliminary 2, March 2009 Studio T echnologies, Inc. Page 15 External 24 V olts as the Power Source As previously discussed, the Model 45 can be powered by a source of 24 volts DC. A “locking” 2.1 x 5.5 mm coaxial power jack is located on the back panel of the unit.
Issue Preliminary 2, March 2009 Model 45 User Guide Page 16 Studio T echnologies, Inc. drop can become appreciable in situations where belt pack operation wouldn’t nor - mally be impacted. P erforming accurate calculations in this scenario is a bit more difficult but might be required to ensure a reliable installation.
Model 45 User Guide Issue Preliminary 2, March 2009 Studio T echnologies, Inc. Page 17 external source of 24 volts is going to be connected switch 1 should be placed in its off (down) position.
Issue Preliminary 2, March 2009 Model 45 User Guide Page 18 Studio T echnologies, Inc. interface to be auto nulled at approxi- mately the same time. The dual auto null mode allows a single “tap” of the button to initiate nulling of both hybrid circuits.
Model 45 User Guide Issue Preliminary 2, March 2009 Studio T echnologies, Inc. Page 19 the Model 45’s 2-wire-to-4-wire converter circuitry . These audio artifacts will not cause any damage but will be sent out of the 4-wire line outputs.
Issue Preliminary 2, March 2009 Model 45 User Guide Page 20 Studio T echnologies, Inc. are fully isolated from the 2-wire intercom circuit. In this situation the Model 45’s only function is to route, by way of the hybrids, the 2-wire interface’s audio signals to and from the 4-wire outputs and inputs.
Model 45 User Guide Issue Preliminary 2, March 2009 Studio T echnologies, Inc. Page 21 pin 2 falls below 24 volts for a continuous 1- second interval. The hardware and software responds to this condition by turning off the power source to pin 2 and flashing the pin 2 LED as a warning.
Issue Preliminary 2, March 2009 Model 45 User Guide Page 22 Studio T echnologies, Inc. device’s nominal level matches the Model 45’s level setting its actual nominal level may be significantly different.
Model 45 User Guide Issue Preliminary 2, March 2009 Studio T echnologies, Inc. Page 23 An auto null sequence begins with the muting of the 4-wire input and output signal paths associated with the channel being nulled. This is followed by a short period of 24 kHz signal that is sent out the 2-wire party-line intercom interface channel.
Issue Preliminary 2, March 2009 Model 45 User Guide Page 24 Studio T echnologies, Inc. readily apparent. The front-panel LEDs will continue to display the DC power status of pins 2 and 3. But whether or not either or both LEDs are lit, the Model 45 will never apply 200 ohm terminations to pins 2 or 3.
Model 45 User Guide Issue Preliminary 2, March 2009 Studio T echnologies, Inc. Page 25 Note that while it’s easy to determine which software version is loaded into the Model 45 a trip back to the factory is required to update it. The 8-bit micro- controller that provides the unit’s logic “horsepower” also includes internal FLASH memory .
Issue Preliminary 2, March 2009 Model 45 User Guide Page 26 Studio T echnologies, Inc. unit. P ower can be provided by the con- nected intercom circuits or by way of an external source of 24 volts DC. The final step to achieve correct performance is for the auto null function on each Model 45 to be activated.
Model 45 User Guide Issue Preliminary 2, March 2009 Studio T echnologies, Inc. Page 27 Specifications General Audio: Frequency Response: ±2 .5 dB 100 Hz to 8 kHz Distortion (THD+N): <0.
Issue Preliminary 2, March 2009 Model 45 User Guide Page 28 Studio T echnologies, Inc. Interfacing RTS® Matrix Intercom Systems with the Model 45 Interface Appendix A ADAM ™ Matrix Intercom System .
Model 45 User Guide Issue Preliminary 2, March 2009 Studio T echnologies, Inc. Page 29 Interfacing Riedel® Artist™ Matrix Intercom System Analog Ports with the Model 45 Interface Appendix B.
Issue Preliminary 2, March 2009 Model 45 User Guide Page 30 Studio T echnologies, Inc. Interfacing Clear-Com® Matrix Intercom System Analog P orts with the Model 45 Interface Appendix C.
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An important point after buying a device StudioTech M45-00151 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought StudioTech M45-00151 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data StudioTech M45-00151 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, StudioTech M45-00151 you will learn all the available features of the product, as well as information on its operation. The information that you get StudioTech M45-00151 will certainly help you make a decision on the purchase.
If you already are a holder of StudioTech M45-00151, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime StudioTech M45-00151.
However, one of the most important roles played by the user manual is to help in solving problems with StudioTech M45-00151. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device StudioTech M45-00151 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
