CLEAR-COM ENCORE RM-702 TWO-CHANNEL REMOTE STATION INSTRUCTION MANUAL
RM-702 Two-Channel Remote Station Instruction Manual Part Number 810343Z Rev. 4 Legal Disclaimer Copyright © 2013 HME Clear-Com Ltd. 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.
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 Please read and follow these instructions before operating this product. 1. 2. 3. 4. 5. 6. 7. 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.
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.
remains constant, and does not fluctuate as stations leave and join the network. 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.
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. If the panel mic and speaker are being used, set the sidetone control for minimum feed-through to the speaker to prevent feedback.
• 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. 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.
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. 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.
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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.
• The capacitance of the interconnect cable affects system frequency response and sidetone stability. Total capacitance should not be greater than 0.25 uF. 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.
3. Set the set screw on top of the bushing to lock the mic in place.
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.
• PROGRAM ENABLE B: Enables program audio channel B when set to the on position. • MOM TALK A: Setting the momentary talk A switch to the on position will disable the latching function of the channel A talk button. In this mode, the talk button must always be held in continuously while the operator is talking on channel A. • MOM TALK B: Setting the momentary talk B switch to the on position will disable the latching function of the channel B talk button.
You can change this option so that a talk signal, rather than a call signal, interrupts the program audio on channel B. You do this by re-setting an internal jumper. See the next section, “Re-Setting Program Interrupt Options,” for instructions.
• 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.
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.
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.
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 Assistant Director/ Floor Manager 1-Channel Beltpack Telco Line 1-Channel Beltpack 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.
• PA feed to studio output • 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.
terminals for the intercom lines. 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. 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.
for the duration of the talk signal. See the earlier section in this chapter, “Re-setting Program Interrupt Options,” for more information on setting this option. • 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.
Figure 2-14: Connecting Party-Line Products As Program Sources RM-702 TWO-CHANNEL REMOTE 2-17
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.
MAINTENANCE INTRODUCTION This chapter provides maintenance information.
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TECHNICAL SPECIFICATIONS RM-702 TWO-CHANNEL STATION dBu is an absolute measurement. 0 dBu is referenced to 0.
Output Impedance Load Impedance 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 Lin
Min Gain Panel Mic - Party Line 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: <= 25dB 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.
are design-center specifications and are included for customer guidance and to facilitate system installation. Actual operating performance may vary.
LIMITED WARRANTY Clear-Com 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. 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.
period will be offered at no charge between 09:00 and 17:00 according to the customer’s local time zone. In addition, for customers who purchase an Extended Warranty or Service 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.
Clear-Com has the right to inspect the equipment and/or installation or relevant packaging. NON-WARRANTY REPAIRS AND RETURNS For items not under warranty, you must obtain an RMA by contacting the User Support Center. Clear-Com representatives will give you instructions and addresses for returning your equipment. You must pay all charges to have the equipment shipped to the support center and returned to you, in addition to the costs of the repair.
PROFITS). SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES OR THE LIMITATION ON HOW LONG AN IMPLIED WARRANTY LASTS, SO THE ABOVE LIMITATIONS MAY NOT APPLY TO YOU. IN ANY EVENT, TO THE MAXIMUM EXTENT PERMITTED UNDER APPLICABLE LAW, CLEAR-COM'S LIABILITY TO CUSTOMER HEREUNDER SHALL NOT UNDER ANY CIRCUMSTANCES EXCEED THE COST OF REPAIRING OR REPLACING ANY PART(S) FOUND TO BE DEFECTIVE WITHIN THE WARRANTY PERIOD AS AFORESAID.
