CLEAR-COM ENCORE RM-702 TWO-CHANNEL REMOTE STATION INSTRUCTION MANUAL
RM-702 Two-Channel Remote Station Instruction Manual © 2007 Vitec Group Communications All Rights Reserved Part Number 810343Z Rev. 3 Vitec Group Communications, LLC. 850 Marina Village Parkway Alameda, CA 94501 U.S.A Vitec Group Communications 7400 Beach Drive Cambridge Research Park Cambridgeshire United Kingdom CB25 9TP Vitec Group Communications Room 1806, Hua Bin Building No. 8 Yong An Dong Li Jian Guo Men Wai Ave Chao Yang District Beijing, P.R.
CONTENTS OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 The Clear-Com Concept. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Intercom line wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13 Program Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14 Internal IFB Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16 External IFB (MA-704 and PIC-4704 Connection) . . . . . . . . . . . . . . . . 2-16 PA Feed to Studio Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IMPORTANT SAFETY INSTRUCTIONS 1. 2. 3. 4. 5. 6. 7. Please read and follow these instructions before operating this product. 8. 9. 10. 11. 12. 13. Read these instructions. Keep these instructions. Heed all warnings. Follow all instructions. Do not use this apparatus near water. Clean only with dry cloth. Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.
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 maintenance instructions are included in the literature accompanying this product.
1 OPERATION INTRODUCTION Congratulations on choosing this Clear-Com product. Clear-Com was established in 1968 and remains the market leader in providing intercoms for entertainment, educational, broadcast, and industrial applications. The ruggedness and high build-quality of Clear-Com products defines the industry standard. In fact, many of our original beltpacks and main stations are still in daily use around the world.
DESCRIPTION The RM-702 is one of a series of professional intercom stations specifically designed for the broadcast industry. This two-channel, one-rack-space station is ideal for 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).
the earphone. If the panel mic and speaker are being used, set the sidetone control for minimum feed-through to the speaker to prevent 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. The call button for that channel will flash red while the call button is pressed indicating the presence of a call signal on the line. VOLUME CONTROLS Each channel has a separate volume control for monitoring incoming audio. Listening is always on and is not controlled by any logic.
ANNOUNCE BUTTON The announce button allows the operator to instantly use the microphone input to directly talk to a system external to the intercom such as a paging speaker/amplifier in another room. A dry set of relay contacts on the rear panel is also available for activating external switching, as needed when the announce button is pressed. The button illuminates amber when pressed. Pressing the announce button momentarily disables any active talks.
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2 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.
JP5 JP4 JP6 JP3 JP2 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. On the main circuit board, locate the JP4 three-pin jumper. The jumper is located on the rightmost upper portion of the circuit card, when viewed from the front of the unit. The label “J4” appears behind the jumper.
The RM-702 unit is shipped with the jumper plug over pins 2 and 3 to maintain the power-channel isolation. Power-channel isolation ensures that if one channel loses power, the other channel will continue to operate. 5. Replace the cover of the RM-702. LINE TERMINATION The fundamental concept of Clear-Com party-line intercom is that all stations provide high-impedance current-sourced signals into a single common system termination.
Portable Installation Cable: Practical cable for portable system interconnections is flexible, two-conductor, shielded microphone cable. For runs less than 500 ft. (152.5 m), a cable made of 24-gauge wire is acceptable. For runs longer than 500 ft. (152.5 m), use a 20-gauge cable or larger. Permanent installation Cable: Vinyl-jacketed shielded pair is the cable of choice for permanent installations. Use a low-capacitance 20-gauge wire for short runs of less than 500 ft. (152.
DESCRIPTION OF REAR PANEL CONNECTORS Intercom Channel A Intercom Channel B Accessory Port DIP Switches Hot Mic/ C-C IFB System Accessory A d dB A A B B ee e F Fe alk lk alk lk g T Ta T Ta nc IFB A n ro g P Pro om m O On An xt e e B M Mo all ll pt t E Lin in t A C Ca tr p g L In t B In Intr on ng g In L Lo ro g P ro P Off On RM-702 Intercom Channel A Intercom Channel B Hot Mic/ C-C IFB System Figure 2-5: RM-702 Rear Panel INTERCOM LINE CONNECTORS (REAR PANEL, XLR-3 2 MALE & 2 FEMALE) The RM-702 h
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” CONNECTOR DB-15F 1 9 2 10 3 11 4 12 5 13 6 14 7 15 8 Foot Switch Common Foot Switch “B” Foot Switch “A” GND Announce Relay N.C. Contact Announce Relay Wiper Announce Relay N.O.
• CALL ON TALK A: If the call on talk A switch is set to the on position, a call signal will be placed on channel A whenever the talk function is activated. This can be used to activate any call-activated functions available on other stations. • CALL ON TALK B: If the call on talk B switch is set to the on position, a call signal will be placed on channel B whenever the talk function is activated. This can be used to activate any call-activated functions available on other stations.
m Pro Enab gra l m eA Mo Ena me nt ble Mo ary O B me nl nt y Cal ary Talk l-o Onl A n Cal -Talk y Tal l-o A k B n-T Int alk err B u Int pt A err nno up u Lon t E nce g L xter n Lon ine A al IF B gL Pro ine B gra m Pro Int gra err m upt Int A err up tB Pro gra Off (Default) On Figure 2-7: DIP switches RE-SETTING PROGRAM INTERRUPT OPTIONS When you set one of the rear-panel program interrupt DIP switches to on for a particular channel (A or B), any call signal activated on that channel interupts the progr
JP5, for channel A 1 2 3 Talk signals interrupt program audio JP6, for channel B 1 Call signals 2 3 interrupt program audio FOR EITHER CHANNEL: To interrupt program audio during talk signals, place jumper plug over pins 1 and 2. To interrupt program audio during call signals, place jumper plug over pins 2 and 3. Figure 2-8: Changing Program Interrupt Options PANEL MIC LEVEL ADJUSTMENT (INTERNAL) The microphone preamplifier for the panel microphone has an internal gain adjustment control.
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. When using a speaker, a good sidetone null is necessary to achieve a usable listening level.
TYPICAL SYSTEM APPLICATIONS ENG/EFP TRUCK The following block diagram describes a typical ENG/EFP truck installation. Engineer Director Telephone Interface RM-702 RM-702 AC-701 Program Input Power Supply Camera Operator RS-601 Assistant Director/ Floor Manager Telco Line RS-601 PS-702 Channel A Talent Announcer TR-50 Channel B Figure 2-10: Typical ENG/EFP Truck Installation The system has two 2-channel RM-702 rack-mount stations.
CABLE/SCHOOL TELEVISION STUDIO The following block diagram describes a typical cable or school television studio installation.
• 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. • Termination of the intercom audio line external to remote stations.
CAUTION: All Clear-Com Intercom lines must be terminated. Care must be taken not to fail to terminate or to “double”-terminate a line. All unused intercom inputs must be terminated to keep the line drive circuits stable. The RM-702 does not provide termination on the intercom line. PROGRAM INPUT There are two different purposes for the program input: monitoring program in the speaker and headphone, or feeding the Channel A and B intercom lines with program material.
• To Connect To The Program Input: The program input of the RM-702 is available in the DB-15 accessory connector on the rear panel. “ACCESSORY” CONNECTOR DB-15F 1 9 2 10 3 11 4 Viewed from the rear of the unit 12 5 13 6 14 7 15 8 Power (+30 VDC) GND – Program Input + Program Input Figure 2-13: Connecting Program Sources Connect a balanced input to pins #8 and #15 with the shield connected to pin #7.
INTERNAL IFB OPERATION To use either channel A or B as an IFB feed, connect the program source to the program input (as described in the previous section) and set the Program Interrupt A (or B) DIP switch to the on position. The program will now be interrupted whenever there is a call signal present on channel B. If there are multiple RM-702s in the system, the program should only be fed into one of the RM-702s.
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. Isolated relay contacts are also available for controlling some external devices, such as a PA amplifier to another room.
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. Both latching and momentary actions are active.
3 MAINTENANCE INTRODUCTION This chapter provides maintenance information.
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4 TECHNICAL SPECIFICATIONS RM-702 TWO-CHANNEL STATION dBu is an absolute measurement. 0 dBu is referenced to 0.
IFB/Hot Mic Type Output Impedance Load Impedance Frequency Response Panel Mic - Party Line Headset Mic - Party Line Headset Mic - Line Out Program Input - Party Line Program Input - Headset Out Program Input - Speaker Out Party Line - Headset Out Party Line - Speaker Out Max Distortion Panel Mic - Party Line Headset Mic - Party Line Headset Mic - Line Out Program Input - Party Line Program Input - Headset Out Program Input - Speaker Out Party Line - Headset Out Party Line - Speaker Out Noise Panel Mi
Power Input Voltage Range Input Current (Idle) Input Current (Max) Rear Panel Connectors Intercom: Hot Mic / IFB Interface: Accessory Rear Panel Controls Front Panel Connectors Panel Mic: Headset: Front Panel Controls & Indicators Environmental Dimensions Dimensions: Weight Weight: 20-30 VDC <= 90mA <=110mA (2) XLR-3M (1 per channel) (2) XLR-3F (1 per channel) (1) 1/4 in. (0.64 cm) phone jack (1) DB-15F (12) Option switches (1) 1/4 in. (0.
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LIMITED WARRANTY Vitec Group Communications (VGC) 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. VGC offers 24 x 7 customer support if you have an Extended Warranty or Service Contract. Return Material Authorization (RMA) numbers are required for all returns. Both warranty and non-warranty repairs are available.
such agreement. For more information, contact your authorized dealer, distributor, or sales representative. Instructions for reaching VGC’s User Support Centers are given below. Telephone for Europe, Middle East and Africa: +49 40 6688 4040 Telephone for the Americas and Asia: +1 510 337 6600 Email: vitec.support@AVC.de Once the standard warranty period has expired, the User Support Center will continue to provide telephone support if you have purchased an Extended Warranty or Service Contract.
years the warranty of any product offered with a standard two-year warranty. The total warranty period will not extend beyond five years. Any purchase of an extended warranty provides 24 x 7 customer support in addition to the warranty immediately upon purchase of the warranty extension. Note: VGC does not offer warranty extensions on UHF wireless intercom systems, or on any product with a 1-year or 90-day warranty.
of customer furnished components resulting in damage to VGC provided product. This limited warranty is not transferable and cannot be enforced by anyone other than the original consumer purchaser. This warranty gives you specific legal rights and you may have other rights which vary from country to country.
