Clear-Com ENCORE RM-702 Instruction Manual
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Clear-Com ENCORE RM-702 Instruction Manual

Clear-Com ENCORE RM-702 Instruction Manual

Two-channel remote station
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CLEAR-COM ENCORE
RM-702 TWO-CHANNEL REMOTE STATION
I N S T R U C T I O N M A N U A L

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  • Page 1 CLEAR-COM ENCORE RM-702 TWO-CHANNEL REMOTE STATION I N S T R U C T I O N M A N U A L...
  • Page 2 All rights reserved. Clear-Com, the Clear-Com logo, and Clear-Com Concert are trademarks or registered trademarks of HM Electronics, Inc. The software described in this document is furnished under a license agreement and may be used only in accordance with the terms of the agreement.

  • Page 3: Table Of Contents

    The Clear-Com Concept........
  • Page 4 Intercom line wiring ........2-13 Program Input.

  • Page 5: Important Safety Instructions

    IMPORTANT SAFETY INSTRUCTIONS 1. Read these instructions. 2. Keep these instructions. 3. Heed all warnings. 4. Follow all instructions. 5. Do not use this apparatus near water. 6. Clean only with dry cloth. Please read and follow 7. Do not block any ventilation openings. Install in accordance with the these instructions before manufacturer’s instructions.
  • Page 6 CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN This symbol alerts you to the presence of uninsulated dangerous voltage within the product's enclosure that might be of sufficient magnitude to constitute a risk of electric shock. Do not open the product's case. This symbol informs you that important operating and main- tenance instructions are included in the literature accompanying this product.

  • Page 7: Operation

    One termination (per channel) is needed throughout the intercom network, and is usually located in the main station or power supply. Clear-Com is a distributed amplifier system; each main and remote station houses its own mic preamplifier, headset or speaker power amplifier, and signaling circuitry.

  • Page 8: Description

    ENG and EFP trucks, production studio consoles, and small TV facilities. The station can be tailored to your needs through its programmable talk button options. The RM-702 is compatible with all Clear-Com party-line intercoms. The station also incorporates an internal single-channel program interrupt system (IFB).

  • Page 9: Operation

    OPERATION Normal operation of the RM-702 requires access only to the front panel controls. For intercom operation, set the listen level controls for each channel to the desired level and press the talk switches when talking. If a headset is being used, set the sidetone control for the receiving channel for the desired amount of sidetone in the earphone.

  • Page 10: Call Buttons

    • SPEAKER DIP FUNCTION: Pressing either talk button will reduce the output level of the speaker by a set amount to avoid feedback. CALL BUTTONS Each channel has its own call button. Pressing the call button at any time will send a call signal on that channel regardless of the activation of the talk circuit for that channel.

  • Page 11: Program Monitor Level Control

    PROGRAM MONITOR LEVEL CONTROL The program volume control sets the amount of the program signal heard directly in the headphone or speaker. This control only affects what is heard in the headphone or speaker and does not affect program feed to the intercom lines.
  • Page 12 1 - 6 R M - 7 0 2 T W O - C H A N N E L R E M O T E S T A T I O N...

  • Page 13: Installation

    This section discusses the installation of the RM-702 in an intercom system including typical applications, overall installation theory, detail of each connector, and adjustments. INSTALLATION OVERVIEW This section describes the Clear-Com concept of intercom line connection. The following subjects are discussed: • Intercom line connection •...
  • Page 14 Figure 2-2: RM-702 PCB Layout To connect or isolate RM-702 channels: 1. Please observe anti-static procedures. The circuit cards can be damaged by static electricity. Please ground yourself and tools before touching any circuit cards. 2. Remove the cover of the RM-702. 3.

  • Page 15: Line Termination

    CABLE CONSIDERATIONS The Clear-Com intercom line is intended to run on a shielded twisted pair of cable per channel of intercom. One conductor carries full duplex (“two-way”) audio, the other conductor carries the DC power for remote stations. The shield is used for ground return for audio and power.

  • Page 16: Description Of Front Panel Connectors

    Pin 4 --- Headphone hot PANEL MIC CONNECTOR (FRONT PANEL) Clear-Com provides two plug-in panel microphones for use on the RM-702. The GM-9 is 9 in. (22.86 cm) long and GM-18 is 18 in. (45.72 cm) long. The microphone is of the electret type. The microphone has a built-in 1/4 in.

  • Page 17: Description Of Rear Panel Connectors

    A 1/4 in. (0.64 cm) phone jack marked IFB/HOT mic provides an output signal from the selected microphone. This output is intended to work with Clear-Com’s MA-704 IFB control panel. A control signal into this connector from the MA-704 causes all active talks from the station to cease and only sends the IFB output.

  • Page 18: Accessory (Rear Panel, Db-15F)

    ACCESSORY (REAR PANEL, DB-15F) The accessory DB-15F connector on the rear panel provides program input, announce audio output, announce relay contacts, and foot switch inputs for activating a talk on either channel. The pin assignment of the connector is as follows: “ACCESSORY”...
  • Page 19 • INTRPT EXT IFB: When the hot mic output is connected to Clear-Com’s IFB system and the interrupt external IFB switch is set to the on position, pressing a key on the IFB system will disconnect the selected headset or panel microphone from the intercom line(s).

  • Page 20: Re-Setting Program Interrupt Options

    You can change this option so that a talk signal, rather than a call sig- nal, interrupts the program audio on channel B. You do this by re-set- ting an internal jumper. See the next section, “Re-Setting Program Interrupt Options,” for instructions. The RM-702 is shipped from the factory with all DIP switches in the off position.

  • Page 21: Panel Mic Level Adjustment (Internal)

    • For channel B: Move the jumper plug so that it covers pins 1 and 2. This causes talk signal activation to interrupt the program audio. In the default position, the jumper plug covers pins 2 and 3, which causes call signal activation, rather than talk signal activation, to interrupt the program audio.

  • Page 22: Intercom Line Length Compensation (Rear-Panel Dip Switches)

    R161 GAIN ADJUST Figure 2-9: Location of Panel Mic Gain Adjust Control R161 INTERCOM LINE LENGTH COMPENSATION (REAR-PANEL DIP SWITCHES) The receive circuits of the intercom channels have been optimized for an intercom line length of up to 1,000 ft. (304.8 m). The capacitance of the intercom line must be compensated for in the receive circuits if a good sidetone null is to be achieved.
  • Page 23 4. Remove the jumper plug from the pins and place it over pins 1 and 2. This is the on position. Program audio will now accompany the announce audio. 2 - 1 1 R M - 7 0 2 T W O - C H A N N E L R E M O T E...

  • Page 24: Typical System Applications

    Figure 2-10: Typical ENG/EFP Truck Installation The system has two 2-channel RM-702 rack-mount stations. The system is powered from a Clear-Com power supply that also provides the terminations for both channels. Channel B is connected to talent receivers for announcers.

  • Page 25: Cable/School Television Studio

    Figure 2-11: Typical Cable or School Television Studio Installation The system has several 2-channel RM-702 rack mount stations and several wall mount 2-channel stations. The system is powered from a Clear-Com power supply that also provides the terminations for both channels.

  • Page 26: Intercom Line Wiring

    Remote control of talk switches • Inadequate sidetone adjustment INTERCOM LINE WIRING The intercom line wiring has several purposes in the Clear-Com system: • Connection of the audio intercom signal between stations. • Delivery of DC power for remote stations (such as the RM-702) to operate from.

  • Page 27: Program Input

    The PS-702 provides the DC power for the system and the line termination switches must be turned on. CAUTION:All Clear-Com Intercom lines must be terminated. Care must be taken not to fail to terminate or to “double”-terminate a line.
  • Page 28 To connect an unbalanced input, connect the signal to pin #8 and connect the shield to pins #15 and #7. Connecting Party-Line Products As Program Sources: If other Clear-Com products (such as an AC-701 telephone interface) are to be used as a program source directly, use the following interconnection cable.
  • Page 29 Figure 2-14: Connecting Party-Line Products As Program Sources 2 - 1 7 R M - 7 0 2 T W O - C H A N N E L R E M O T E...

  • Page 30: Internal Ifb Operation

    “Re-Setting Program Interrupt Options” earlier in this chapter. EXTERNAL IFB (MA-704 AND PIC-4704 CONNECTION) Clear-Com provides a stand-alone IFB system called a PIC-4704. The PIC-4704 provides four interruptible IFB feeds from two program sources, and is located in a central location. The MA-704 is a four-channel control head intended to work with the PIC-4704.

  • Page 31: Pa Feed To Studio Output

    PA FEED TO STUDIO OUTPUT Pressing the button marked announce on the front of the RM-702 temporarily disables activity of the station and places the output of the selected microphone on the announce audio output terminals of the accessory I/O DB-15 connector on the rear panel of the station.

  • Page 32: Remote Control Of Talk Switches

    REMOTE CONTROL OF TALK SWITCHES The talk switches of the RM-702 can be remotely controlled with external contacts that are available on the accessory connector on the rear panel. A footswitch or remote pushbutton when wired to the accessory connector acts exactly the same as pushing a talk switch on the front panel.

  • Page 33: Maintenance

    MAINTENANCE INTRODUCTION This chapter provides maintenance information. RM-702 Headset Headset Main XLR4 XLR4 Program Limiter Line Level Length Panel Sidetone Headset Null Limiter Jack Panel Mic Gain Listen Spkr Main On/Off Intercom Mute Program Line A Level A Line Length Sidetone Null Listen...
  • Page 34 3 - 2 R M - 7 0 2 T W O - C H A N N E L R E M O T E S T A T I O N...

  • Page 35: Technical Specifications

    TECHNICAL SPECIFICATIONS RM-702 TWO-CHANNEL STATION dBu is an absolute measurement. 0 dBu is referenced to 0.775 volts RMS Panel Microphone Input Input Type Electret Input Impedance >=2KΩ Mic Limiter Threshold 0dBu ±3dB Mic Limiter Range >= 20dB Headset Microphone Input Input Type Dynamic Input Impedance...
  • Page 36 Output Impedance >= 200Ω Load Impedance >= 600Ω IFB/Hot Mic Type Unbalanced Output Impedance 180Ω Load Impedance >= 600Ω Frequency Response Panel Mic - Party Line 600 - 10KHz ± 3dB Headset Mic - Party Line 200 - 12KHz ± 3dB Headset Mic - Line Out 200 - 12KHz ±...
  • Page 37 Weight: 5.2 lbs. (2.36 Kg) Notice About Specifications While Clear-Com makes every attempt to maintain the accuracy of the information contained in its product manuals, that information is subject to change without notice. Performance specifications included in this manual 4 - 3...
  • Page 38 are design-center specifications and are included for customer guidance and to facilitate system installation. Actual operating performance may vary. 4 - 4 R M - 7 0 2 T W O - C H A N N E L R E M O T E S T A T I O N...

  • Page 39: Limited Warranty

    LIMITED WARRANTY Clear-Com warrants that at the time of purchase, the equipment supplied complies with any specification in the order confirmation when used under normal conditions, and is free from defects in workmanship and materials during the warranty period. Clear-Com offers 24 x 7...

  • Page 40: Warranty Repairs And Returns

    Contract, 24-hour customer support is offered immediately upon purchase of such agreement. For more information, contact your authorized dealer, distributor, or sales representative. Instructions for reaching Clear-Com’s User Support Centers are given below. Americas and Asia-Pacific Headquarters California, United States Tel: +1.510.337.6600 Email: CustomerServicesUS@clearcom.com Europe, Middle East, and Africa Headquarters Cambridge, United Kingdom Tel: +44 1223 815000 Email: SalesSupportEMEA@clearcom.com...

  • Page 41: Non-Warranty Repairs And Returns

    1-year or 90-day warranty. SERVICE CONTRACT Clear-Com also offers service contracts that provide 24 x 7 telephone support, advance replacements, training, proactive maintenance, on-site visits, and no charge for repair or replacement of equipment. For more information, contact your authorized dealer, distributor, or sales representative.
  • Page 42 BE DEFECTIVE WITHIN THE WARRANTY PERIOD AS AFORESAID. This warranty does not cover any damage to a product resulting from cause other than part defect and malfunction. The Clear-Com warranty does not cover any defect, malfunction, or failure caused beyond the control of...

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