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.
The product described in this document is distributed under licenses restricting its use, copying, distribution, and decompilation/
reverse engineering. No part of this document may be reproduced in any form by any means without prior written authorization
of Clear-Com, an HME Company.
Clear-Com Offices are located in California, USA; Cambridge, UK; Montreal, Canada; and Beijing, China. Specific addresses
and contact information can be found on Clear-Com's corporate website:
www.clearcom.com
Clear-Com Contacts
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
Canada Office
Quebec , Canada
Tel: +1 (450) 653-9669
China Office
Beijing Representative Office
Beijing, P.R.China
Tel: +8610 65811360 / 65815577
CONTENTS
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
The Clear-Com Concept. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Talk Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Call Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Volume Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
SideTone Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Program Send Level Control for Channel A and B . . . . . . . . . . . . . . . . . 1-4
Speaker On/Off Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Mic Select Switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Program Monitor Level Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Announce Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Installation Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Intercom Line Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Connecting or Isolating RM-702 Channels . . . . . . . . . . . . . . . . . . . . . . . 2-1
Line Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Station Powering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Cable Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Description of Front panel Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Headset Connector (Front Panel) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Panel Mic Connector (Front Panel) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Description of Rear Panel Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Intercom Line Connectors
(Rear Panel, XLR-3 2 Male & 2 Female) . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
IFB/Hot Mic (Rear Panel, 1/4-Inch Phone Jack) . . . . . . . . . . . . . . . . . . . 2-5
Accessory (Rear Panel, DB-15F) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Description of Options and Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
DIP Switch Option Switches (Rear Panel). . . . . . . . . . . . . . . . . . . . . . . . 2-6
Re-Setting Program Interrupt Options . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Panel Mic Level Adjustment (Internal) . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
Intercom Line Length Compensation (Rear-Panel DIP Switches) . . . . 2-10
Program Feed on Announce. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
Typical System Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
ENG/EFP Truck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Cable/School Television Studio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
Actual Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
RM-702 TWO-CHANNEL REMOTE STA-
i
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17
Remote Control of Talk Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18
Inadequate Side-tone Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
TECHNICAL SPECIFICATIONS . . . . . . . . . . . . . . . . . . 4-1
RM-702 Two-Channel Station . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
LIMITED WARRANTY. . . . . . . . . . . . . . . . . . . . . . . . . . 5-I
Warranty Period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-i
Technical Support. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-i
Warranty Repairs and Returns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-ii
Non-Warranty Repairs and Returns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-ii
Extended Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-ii
Service Contract . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-iii
Liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-iii
ii
RM-702 TWO-CHANNEL REMOTE STATION
Please read and follow
these instructions before
operating this product.
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.
7. Do not block any ventilation openings. Install in accordance with the
manufacturer’s instructions.
8. Do not install near any heat sources such as radiators, heat registers,
stoves, or other apparatus (including amplifiers) that produce heat.
9. Only use attachments/accessories specified by the manufacturer.
10. Use only with the cart, stand, tripod, bracket, or table specified by the
manufacturer, or sold with the apparatus. When a cart is used, use caution
when moving the cart/apparatus combination to avoid injury from
tip-over.
11. Unplug this apparatus during lightning storms or when unused for long
periods of time.
12. Refer all servicing to qualified service personnel. Servicing is required
when the apparatus has been damaged in any way, such as power-supply
cord or plug is damaged, liquid has been spilled or objects have fallen into
the apparatus, the apparatus has been exposed to rain or moisture, does
not operate normally, or has been dropped.
13. WARNING: To reduce the risk of fire or electric shock, do not expose
this product to rain or moisture.
Please familiarize yourself with the safety symbols in Figure 1. When you
see these symbols on this product, they warn you of the potential danger
of electric shock if the station is used improperly. They also refer you to
important operating and maintenance instructions in the manual.
RM-702 TWO-CHANNEL REMOTE STATION
iii
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.
Figure 1: Safety Symbols
EMC AND SAFETY
The RM-702 station meets all relevant CE and FCC specifications set out
below:
EN55103-1 Electromagnetic compatibility. Product family standard for
audio, video, audio-visual, and entertainment lighting control apparatus
for professional use. Part 1: Emissions.
EN55103-2 Electromagnetic compatibility. Product family standard for
audio, video, audio-visual, and entertainment lighting control apparatus
for professional use. Part 2: Immunity.
And thereby compliance with the requirement of Electromagnetic
Compatibility Directive 2004/108/EC and Low Voltage Directive
2006/95/EC
This device complies with Part 15 of the FCC Rules. Operation is subject
to the following two conditions: (1) this device may not cause harmful
interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation.
iv
RM-702 TWO-CHANNEL REMOTE STATION
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.
THE CLEAR-COM CONCEPT
Clear-Com is a closed-circuit intercom system that consistently provides
high-clarity communication in high-noise and low-noise environments. A
basic system consists of a single- or multi-channel power supply or main
station connected to various single- or multi-channel remote stations, such as
beltpacks and loudspeaker stations.
Clear-Com manufactures a wide variety of both portable and
fixed-installation units. All are compatible with each other. Clear-Com
intercom systems can also interface with other communication systems and
devices.
Clear-Com stations are interconnected with two-conductor, shielded
microphone cable, using 3-pin XLR connectors. One wire carries the DC
power from a main station or power supply to all remote stations, and the
other wire carries two-way (duplex) audio information. The shield acts as a
common ground. 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. Low-impedance mic input lines and specially designed
circuitry make Clear-Com channels virtually immune to RFI and dimmer
noise.
Clear-Com main stations, power supplies and certain remote stations have
auxiliary program inputs with local volume control, allowing an external
audio source to be fed to the intercom system.
Visual signal circuitry (call lights), a standard feature on most main and
remote stations, allows the user to attract the attention of operators who have
removed their headsets.
Depending on the type of main and remote stations selected (and assuming
that enough DC power is available) remote stations can be distributed along a
mile of wire. Remote stations bridge the intercom line at a very high
impedance and place a minimum load on the line. The audio level always
RM-702 TWO-CHANNEL REMOTE STA-
1-1
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.
The station also incorporates an internal single-channel program interrupt
system (IFB). When activated, one or more stations can interrupt the program
to a talent with Clear-Com’s wired or wireless talent receivers. Direct
connection to Clear-Com’s IFB system is easily accomplished through a 1/4
in. (0.62 cm) phone jack on the rear panel intended to directly connect to a
Clear-Com MA-704.
The RM-702 remote speaker/headset station allows selectable two-channel
talking and/or listening on a Clear-Com intercom system. The operator can
communicate on either of the channels separately or on both at once.
Illuminated dual-action talk buttons provide electronic momentary or latching
capability. The latching feature may be disabled if desired. The talk buttons
can also be remote controlled for footswitch or other use. Monitoring activity
is possible through the speaker or headset or both at once.
The RM-702 features visual call signaling to attract the attention of operators
who have removed their headsets or turned off their speakers.
This station accepts dynamic headsets. The station accepts two different
lengths of plug-in gooseneck microphones, 9 in. (22.86 cm) and 18 in. (45.72
cm), to allow for different operating locations/positions.
The station’s speaker can be turned on or off by a convenient front panel
switch when private conversation via the headset is desired. A speaker
dipping circuit provides an additional amount of acoustic output before
feedback. This feature helps to reduce feedback when stations are placed in
close proximity to each other. The station accepts a balanced program input
for monitoring external audio in the headset or speaker. Individual sidetone
controls for each channel allow the operator to vary the level of his/her own
voice as heard in the headset/speaker.
Studio announce allows control of a paging speaker in a studio. A front panel
button activates this function and an associated relay.
The RM-702 installs in a standard 19 in. (48.26 cm) equipment rack, using
only one rack space. The station provides two 3-pin, XLR connectors for
input and loop-through on each channel.
1-2
RM-702 TWO-CHANNEL REMOTE STATION
OPERATION
Panel Mic
Speaker
Program
Level
On
Off
Sidetone
Null
Level
Announce
Level
ProgramProgram
Channel A Channel B
Sidetone
Null
Volume
Volum e
Talk
Headset
Panel Mic
Headset
2-Channel
Remote Station
RM-702
Call
Tal k
Buttons
Call
Buttons
Channel A
Vol ume
Channel B
Vol ume
Channel A
Sidetone
Channel B
Sidetone
Program
Level A
Program
Level B
Speaker
Switch
MIC
Select
Switch
Announce
Button
Program
Monitor
Level
Panel
Microphone
Panel
Headset
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.
Figure 1-1: RM-702 Front Panel
The rest of this section is a detailed description of each control.
TALK BUTTONS
Each channel has its own illuminated talk button for activating the
microphone feed to a given channel. Mechanically, the pushbutton is
momentary in action; however, electrically the button has dual action
(momentary or latching) depending on how the button is pressed. The latching
function can be defeated with a rear-panel DIP switch.
• LATCHING: Pressing the button quickly will toggle the talk function,
alternately turning it on or off.
• MOMENTARY: Pressing the button for longer than 1/4 second will turn
the button press into a momentary function such that when the button is
released the talk function will turn off. In any case the talk function is
activated all of the time the button is pressed.
• TALK INDICATION: The talk button illuminates yellow when a talk is
activated and blue when talk is not active.
• CALL INDICATION: The call button will flash red when a call signal
is received on that channel.
• AUTO-CALL ON TALK: Each channel can be set to send a call signal
when the talk function is active. This function is used to activate IFB
circuits or any other call-activated function available on other stations. A
DIP switch on the rear panel activates this function.
RM-702 TWO-CHANNEL REMOTE
1-3
• 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.
VOLUME CONTROLS
Each channel has a separate volume control for monitoring incoming audio.
Listening is always on and is not controlled by any logic. To listen to a
channel, turn up the appropriate control. To not listen to a channel, turn the
control completely off.
SIDETONE CONTROLS
Each channel has a sidetone null control. This control sets the amount of the
microphone that is heard in the earphone from that channel.
This control is a true hybrid null control and therefore is sensitive to changes
in line loading. For headphone use, it is best to find the null for a given
channel and then rotate the control clockwise to obtain the desired sidetone
level.
If the speaker and panel microphone are used together, providing a possible
acoustic feedback path, it will be necessary to use an almost complete null of
the sidetone control.
PROGRAM SEND LEVEL CONTROL FOR CHANNEL A AND B
Both channels A and B have a program send level control that sets the volume
of program audio being sent to that channel when the program is activated.
SPEAKER ON/OFF SWITCH
The switch marked speaker on/off is used to turn the speaker on and off.
MIC SELECT SWITCH
1-4
The mic select switch enables the operator to select which microphone is
active.
RM-702 TWO-CHANNEL REMOTE STATION
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. 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. Active talk circuits will be restored
when the button is released.
The talk-muting action can be defeated if desired by moving an internal
jumper. (See the section on internal options and adjustments.)
RM-702 TWO-CHANNEL REMOTE
1-5
1-6
RM-702 TWO-CHANNEL REMOTE STATION
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
• Line termination
• Station powering
• Cable considerations
INTERCOM LINE CONNECTION
The RM-702 provides male and female XLR-3 connectors for each intercom
line, which are looped through.
CONNECTING OR ISOLATING RM-702 CHANNELS
An internal jumper in the RM-702 unit allows you to defeat the
power-channel isolation of the unit, as described in the following procedure.
Note: This adjustment should only be carried out by qualified service
personnel.
RM-702 TWO-CHANNEL REMOTE
2-1
Figure 2-2: RM-702 PCB Layout
JP4
JP2
JP3
JP6
JP5
JP4 1
2
3
JP4
1
2
3
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. A jumper plug is placed over pins 2 and 3.
4. Do one of the following:
• To connect the two channels, place the jumper plug over pins 1 and 2.
Figure 2-3: Jumper Set to Connect Channels
• To isolate the two channels, place the jumper plug over pins 2 and 3.
2-2
Figure 2-4: Jumper Set to Isolate Channels
RM-702 TWO-CHANNEL REMOTE STATION
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 receive or listen section of stations contain a hybrid null circuit that
attempts to reject (null) any talk signal being sent by that station on that
channel. The hybrid null circuit depends on a known impedance on the
intercom line to accomplish this. Variations in impedance on the line upset the
null.
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. Clear-Com
main stations and power supplies provide switch-selectable termination
networks on all intercom output lines. It is up to the user to determine where
the termination will be provided. An unterminated line will cause excessive
levels, possible oscillation of line drivers, and severe unbalance of hybrid null
networks. A double- or multiple-terminated line will cause low levels and
severe unbalance of hybrid null circuits.
The termination of an intercom line (or channel) is a 220 Ohm resistor in
series with a 4.7 K Ohm that is paralleled with a 10 uF capacitor.
STATION POWERING
Typical Clear-Com systems are powered by a main station or a power supply.
Clear-Com power supplies can be paralleled to increase the number of remote
stations that can be operated in a system.
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. When choosing
interconnect cable, keep the following considerations in mind:
• DC resistance of the ground or common conductor affects crosstalk. For
runs longer than 500 ft. (152.5 m), do not use wire smaller than 20 gauge.
RM-702 TWO-CHANNEL REMOTE
2-3
• 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.
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. (152.5 m) and 18-gauge cable for runs greater
than 500 ft. (152.5 m). Placing the cable in conduit is recommended, but not
necessary.
Multi-pair cable that is individually shielded is acceptable for use in
multi-channel systems. For cross-talk considerations, the shields must be tied
together on both ends of the cable to produce the lowest possible DC path for
ground return.
DESCRIPTION OF FRONT PANEL CONNECTORS
HEADSET CONNECTOR (FRONT PANEL)
Note: The following is a description of a recommended headset.
Mic Type --- Dynamic, for details see the technical specifications
Wiring
Pin 1 --- Mic common
Pin 2 --- Mic hot
Pin 3 --- Headphone common
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.
(0.64 cm) phone jack for a connector. A mating receptacle is mounted on the
RM-702.
To install a GM-9 or GM-18 panel mount microphone, use the following
steps:
2-4
1. Check the set screw in the mic-mounting flange to make sure it is clear of
the threads in the bushing.
2. Screw the microphone into the bushing hand-tight.
RM-702 TWO-CHANNEL REMOTE STATION
3. Set the set screw on top of the bushing to lock the mic in place.
Intercom Channel A Intercom Channel BRM-702
Hot Mic/
C-C IFB
System
Call
On T
alk
A
Call
On T
alk
B
Intrp
t An
nc
Intrp
t E
xt IF
B
Long Line A
Long Line B
Prog
Int
A
Prog
Int B
On
Off
Mom
T
alk
B
Mom
T
alk A
Prog Fee
d B
Prog
Feed
A
Accessory
Intercom
Channel
A
Intercom
Channel
B
Accessory
Port
Hot Mic/
C-C IFB
System
DIP
Switches
DESCRIPTION OF REAR PANEL CONNECTORS
Figure 2-5: RM-702 Rear Panel
INTERCOM LINE CONNECTORS (REAR PANEL, XLR-3 2 MALE & 2 FEMALE)
The RM-702 has a male and female pair of XLR-3 connectors for each
intercom line. The male-female pair of connectors are wired parallel and
intended for loop-through connection.
The pinout of the intercom connectors is as follows:
Pin 1 --- Ground (shield)
Pin 2 --- Power
Pin 3 --- Audio
IFB/HOT MIC (REAR PANEL, 1/4-INCH PHONE JACK)
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.
The pin description of the connector is as follows:
Tip --- Microphone audio output
Ring --- Control signal (>15 VDC)
Sleeve --- Ground (shield)
RM-702 TWO-CHANNEL REMOTE
2-5
ACCESSORY (REAR PANEL, DB-15F)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
“ACCESSORY” CONNECTOR
DB-15F
Foot Switch Common
Foot Switch “B”
Foot Switch “A”
GND
Announce Relay N.C. Contact
Announce Relay Wiper
Announce Relay N.O. Contact
GND
GND
– Announce Audio Output
+ Announce Audio Output
Power (+30 VDC)
GND
– Program Input
+ Program Input
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:
2-6
Figure 2-6: Viewed from the rear of the connector
DESCRIPTION OF OPTIONS AND ADJUSTMENTS
DIP SWITCH OPTION SWITCHES (REAR PANEL)
Twelve DIP switches on the rear panel enable various options in the station:
• PROGAM ENABLE A: Enables program audio on channel A when set
to the on position.
RM-702 TWO-CHANNEL REMOTE STATION
• 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. In this
mode, the talk button must always be held in continuously while the
operator is talking on channel B.
• 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.
• INTRPT ANNC: If the interrupt announce switch is set to the on
position, pressing the announce button will disconnect the microphone
from the intercom line(s). This will allow announcements to be made
without being heard over the intercom channels.
• 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). This
allows the RM-702 microphone to be used to cue talent without
affecting intercom line communication.
• LONG LINE A: If a long cable run on channel A is unavoidable and
approaches 1,000 ft. (305 m) or more, set the long line A option switch
to the on position. The ability to set a sidetone null on channel A
depends upon properly setting this switch.
• LONG LINE B: If a long cable run on channel B is unavoidable and
approaches 1,000 ft. (305 m) or more, set the
to the on position. The ability to set a sidetone null on channel B
depends upon properly setting this switch.
• PROGRAM INTERRUPT A: Interrupts the program audio to channel A
while a call signal is sent on channel A (default).
You can change this option so that a talk signal, rather than call signal, interrupts the program audio on channel A. You do this by re-setting an internal jumper. See the next section, “Re-Setting Program
Interrupt Options,” for instructions.
long line B option switch
• PROGRAM INTERRUPT B: Interrupts the program audio to channel B
while a call signal is sent on channel B (default).
RM-702 TWO-CHANNEL REMOTE
2-7
You can change this option so that a talk signal, rather than a call sig-
Momentary Only Talk B
Call-on-Talk A
Call-on-Talk B
Interrupt Announce
Interrupt External IFB
Long Line A
Long Line B
Program Interrupt A
Program Interrupt B
Program Enable A
Program Enable B
Momentary Only Talk A
Off (Default)
On
nal, 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.
The RM-702 is shipped from the factory with all DIP switches in the off
position. To enable a function, place that DIP switch in the on position.
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 program audio during the call signal.
You can change this option so that activating a talk signal, rather than a call
signal, interrupts the program audio for the duration of the signal. You do this
by re-setting an internal jumper on the station’s internal circuit board.
To re-set the program interrupt option:
1. Please observe anti-static procedures. Static electricity can damage a circuit
card. Please ground yourself and tools before touching the circuit card.
2. Remove the cover of the RM-702 by removing the eight Phillips screws.
3. On the main circuit board, locate one of the following:
• For channel A: The JP5 three-pin jumper, located in the center of the
circuit board.
• For channel B: The JP6 three-pin jumper, located in the center of the
circuit board.
4. A jumper plug covers two of the three pins on each jumper. To change the
program-interrupt option on your station, do one of the following:
2-8
• For channel A: Move the jumper plug so that it covers pins 1 and 2.
This causes talk signal activation to interrupt the program audio.
RM-702 TWO-CHANNEL REMOTE STATION
• For channel B: Move the jumper plug so that it covers pins 1 and 2.
T
T
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.
JP5, for channel A
1
2
3
JP6, for channel B
1
2
3
Talk signals
interrupt
program audio
Call signals
interrupt
program audio
FOR EITHER CHANNEL:
o interrupt program audio during talk signals,
place jumper plug over pins 1 and 2.
o 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. This gain can be adjusted for different operating
conditions. As shipped from the factory, the control is set to minimum gain
such that the panel microphone and a headset microphone have the same
volume when worked at about 2 in. (5.08 cm).
To adjust the panel microphone gain, you must open the unit. Ground yourself
and tools before touching the circuit board, as circuit boards can be damaged
by static electricity. Remove the top cover of the unit, and locate the jumper
labeled “R161.” It is located on the leftmost side of the circuit board, toward
the front of the unit when facing it. Use a small screwdriver to turn the control
clockwise to increase gain or counterclockwise to decrease gain.
RM-702 TWO-CHANNEL REMOTE
2-9
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.
A set of two rear-panel DIP switches have been provided to compensate for
lines longer than 1,000 ft (304.8 m). Each intercom channel has its own DIP
switch.
To change the setting of the line length compensation DIP switches, move
either the long line A or long line B DIP switch to the “on” position for
intercom lines longer than 1,000 ft. (304.8).
PROGRAM FEED ON ANNOUNCE
You can set up the announce feature so that program audio is sent out on the
announce line as well as the announce audio. You set this option up by using
an internal jumper on the circuit board.
To send out program audio along with announcements:
1. Please observe anti-static procedures. Static electricity can damage a circuit
card. Please ground yourself and tools before touching the circuit card.
2. Remove the cover of the RM-702 unit by removing the eight Phillips
screws.
3. Locate the JP2 three-pin jumper on the centermost front portion of the
circuit card.
A jumper plug covers pins 2 and 3 of the jumper. This is the off position.
2-10
RM-702 TWO-CHANNEL REMOTE STATION
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.
RM-702 TWO-CHANNEL REMOTE
2-11
TYPICAL SYSTEM APPLICATIONS
RM-702
Director
Engineer
Telephone Interface
RM-702
AC-701
Program Input
Power Supply
PS-702
Channel A
Camera
Operator
1-Channel Beltpack
Assistant Director/
Floor Manager
1-Channel Beltpack
Talent Announcer
TR-50
Channel B
Telco
Line
ENG/EFP TRUCK
The following block diagram describes a typical ENG/EFP truck installation.
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.
A telephone line interface is connected to the program input of station #2. It
provides a program feed from the studio via a dial-up telephone line. Its
DIP switch options are set to insert program audio on channel B and interrupt
the program when a call signal is present on channel B. The option DIP
switches for placing a call signal on channel B is set on both RM-702s. Now,
whenever either RM-702 initiates a talk to the announcers, it interrupts the
program feed (to the announcers).
2-12
RM-702 TWO-CHANNEL REMOTE STATION
CABLE/SCHOOL TELEVISION STUDIO
Director
Assistant Director
Video
Graphics
RM-702
RM-702
HB-702
HB-702
Cameras Floor Managers
Program Input
Channel A
Channel B
Provided by user
PS-702
1-Channel Beltpack
1-Channel Beltpack1-Channel Beltpack
1-Channel Beltpack 1-Channel Belt
Talent
Announcer
From station PA outputs
Paging spkr
in studio
Mixer/Amp
TR-50
TR-50
The following block diagram describes a typical cable or school television
studio installation.
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.
A line of single-channel beltpacks is connected to channel A. The beltpacks
are used for the cameras and floor managers. Normal communication between
all parties is on channel A.
Channel B is connected to talent receivers for announcers. The program that is
to feed the announcers is connected to the first RM-702. Its DIP switch
options are set to insert program on channel B and interrupt the program when
a call signal is present on channel B. The option DIP switches for placing a
call signal on channel B is set on both RM-702s. Now, either RM-702 will
interrupt the program feed to the announcer when a talk is initiated from it to
the announcers.
A PA amplifier is connected to the announce output of the first RM-702 such
that the operator of that station could talk directly to everyone in the studio.
ACTUAL APPLICATIONS
This section describes detailed instructions for various types of applications.
A block diagram such as those in the previous section describing an
ENG/EFP truck and a cable/school television studio should be developed for
your application. The following sub-topics in this section describe in detail
each of the major application types that might be encountered. The sub-topics
in this section are:
• Intercom line wiring
•Program input
• Internal IFB operation
• External IFB (MA-704 and PIC-4704 connections)
RM-702 TWO-CHANNEL REMOTE
2-13
• 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.
Connect the intercom lines of stations and power supplies using a shielded
twisted pair cable with XLR 3-pin connectors (the same as used for balanced
microphones). Refer to the installation overview section of this manual for
more information.
The RM-702 has a male and female pair of XLR-3 connectors for each
intercom line. The male-female pair of connectors are wired parallel and
intended for loop-through connection.
The pinout of the intercom connectors are as follows:
Pin 1 --- Ground (shield)
Pin 2 --- Power
Pin 3 --- Audio
The following application shows the practical connection of the intercom
lines in the block diagram of the cable/school television studio.
Assistant
4
C
15
B
To
Headset
To
Ear Piece
Announcer
Director
RM-704
BA
B
A
3
4
3
3
3
Cameras
Beltpack Beltpack
3
4
C
To
Headset
To
Ear Piece
3
33
3
Video Graphics
HB-702
H
4
To headset
H
To
headset
H
Floor Managers
Beltpack Beltpack
4
To
Headset
Connection Codes
03 = 3-pin “xlr”
04 = 4-pin “xlr”
15 = DB-15
B = 1/4-inch stereo phone plug (ring/tip/sleeve)
C = 1/8-inch mono phone plug (tip/sleeve)
H = Screw terminals
W = AC power cord
Male
3
3
Female
4
3
To
Headset
HB-702
H
4
4
To headset
To
Headset
Director
RM-704
B
A
B
A
4
3
3
3
To headset
3
3
A
3
PS-702
3
3
B
3
Program Input
Beltpack
3
3
Channel A
From station SA outputs
Talent
Provided by user
3
Channel B
Paging
Speaker
Mixer/Amp
Figure 2-12: Connecting a Small Cable/School Television Studio
2-14
The entire system is wired using male/female microphone cables
looped-through each station except for the HB-702s. The HB-702 has screw
RM-702 TWO-CHANNEL REMOTE STATION
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.
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.
• Monitoring Program: To monitor program in the headphone or speaker:
• Connect the program source to the proper pins on the DB-15.
• Make sure the appropriate rear-panel program enable DIP switch is set
to the on position. For channel A, set the program enable A DIP switch
to on. For channel B, set the program enable B DIP switch to on.
• Use the large knob labeled “Program Volume,” located right next to the
speaker on/off switch, to set the appropriate program volume level. This
knob controls the program volume in the speaker/headphone.
• Set either the A or B potentiometer marked Program Level, located
under either the A or B channel’s volume knob, to the lowest setting.
This control affects the program volume going out onto the selected
intercom line.
• Feeding Channel A or B Intercom Line: To feed the A or B channel
with program material:
• Connect the program source to the proper pins on the DB-15.
• Make sure the appropriate (A or B) rear-panel program enable DIP
switch is set to the on position. For channel A, set the program enable A
DIP switch to on. For channel B, set the program enable B DIP switch
to on.
• Set the large knob, labeled “Program Volume,” located right next to the
speaker on/off switch, to the appropriate level. This knob controls the
program volume in the speaker/headphone.
• Set either the A or B potentiometer marked Program Level, located
under either the A or B channel’s volume knob, to the desired level. This
control affects the program audio level on the intercom line.
• If it is desired to interrupt this program feed, set the appropriate (A or B)
rear-panel Program Interrupt DIP switch to on and ensure that the
Program Enable DIP switch for the channel is set to off. When you do
so, any time you activate a call signal, the program audio is interrupted
for the duration of the call signal. There is an option to change this so
that any time you activate a talk signal, the program audio is interrupted
RM-702 TWO-CHANNEL REMOTE
2-15
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.
“ACCESSORY” CONNECTOR
DB-15F
1
9
2
10
3
4
5
6
7
8
11
12
13
14
15
Viewed from the
rear of the unit
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.
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.
Pin #14 of the DB-15 accessory connector provides +30 VDC to power the
external device. Connecting pins #7 and #15 together unbalances the program
input. The output from the party line device is connected to pin #8 with a
1KOhm load to provide a partial termination.
2-16
RM-702 TWO-CHANNEL REMOTE STATION
Figure 2-14: Connecting Party-Line Products As Program Sources
RM-702 TWO-CHANNEL REMOTE
2-17
INTERNAL IFB OPERATION
Director
1/4” phone jack
Channel A
Channel B
RM-702
Stand-alone
IFB system
PGM 1
PGM 2
PIC-4704
Assistant
Director
1/4” phone jack
Power
Supply
PS-702
RM-702
To additional party line
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.
To interrupt the IFB program automatically when a talk rather than a call
signal is active on channels A or B, you must reset an internal jumper as
described in “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. An MA-704 is located at each
location where program interrupt is to be initiated. Each MA-704 has its own
panel-mounted microphone which, when mounted next to an intercom station
with a panel mounted microphone, causes panel congestion with two
microphones at a single location.
The RM-702 has a 1/4 in. (0.64 cm) phone jack output on its rear panel
intended to connect directly to an MA-704 and provide a microphone feed to
the MA-704. The MA-704 can be ordered without a panel-mounted
microphone. When a button is pressed on the MA-704, a control signal will
temporarily transfer the microphone in use on the RM-702 to the MA-704,
muting any talks active on the RM-702.
To connect the RM-702 to an MA-704, use a two-wire shielded cable with
1/4 in. (0.64 cm) tip, ring, and sleeve jacks on each end. Connect the tip to the
tip, the ring to the ring, and use the shield to connect the sleeve to the sleeve.
Figure 2-15: Typical External IFB System Using a PIC-4704 and MA-704 with a
RM-702
2-18
RM-702 TWO-CHANNEL REMOTE STATION
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.
To connect to the announce output, connect a shielded twisted-pair cable to
pins #6 and #13 of the accessory connector and use pin #5 for connection of
the shield.
A relay is provided that activates when the announce button is pressed and its
contacts are available on the accessory connector. The relay is rated for 2.0
Amps of DC current at 24 VDC.
Figure 2-16: Connections for Announce Audio and Relay Outputs
RM-702 TWO-CHANNEL REMOTE
2-19
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.
Figure 2-17: Connection of External Talk Switches
INADEQUATE SIDE-TONE ADJUSTMENT
The receive circuits of the intercom channels have been optimized for an
intercom line length of up to 1,000 ft (305 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.
Two rear-panel DIP switches are provided to compensate for lines longer than
1,000 ft. (305 m). Each intercom channel has its own DIP switch, as
described in “DIP Switch Option Switches” earlier in this chapter.
2-20
RM-702 TWO-CHANNEL REMOTE STATION
MAINTENANCE
Headset
Mic
Panel Mic
Gain
Panel
Mic
Jack
XLR4
Main
Pgm
Program
Level A
3
2
SA
Output
Hot Mic /
IFB Out
Main
Pgm
Listen
A
Program
Level
XLR4
Headset
Headset
Limiter
Line
Length
Sidetone
Null
Intercom
Line A
Program
Level B
Listen
B
Line
Length
Sidetone
Null
Intercom
Line B
Main
Pgm
3
2
Main
Pgm
Main
Pgm
Power A
3
1
2
Channel A
XLRs (2)
Power B
3
1
2
Channel B
XLRs (2)
+30VDC
+30VDC
Call
Signal
Send &
Receive
System Logic
Front Panel
Switches,
Buttons, &
Indicators
Annc Rly
A
Control
To All
Switches
Intercom
Line A
A
B
Intercom
Lines
Main
Pgm
Footswitches
B
Intercom
Line B
Spkr
On/Off
Mute
Mic
Limiter
Option Switches
INTRODUCTION
This chapter provides maintenance information.
Figure 3-18: Audio Block Diagram for the RM-702
RM-702 TWO-CHANNEL REMOTE STA-
3-1
3-2
RM-702 TWO-CHANNEL REMOTE STATION
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 >=2K
Mic Limiter Threshold 0dBu ±3dB
Mic Limiter Range >= 20dB
Headset Microphone Input
Input Type Dynamic
Input Impedance >= 1K
Mic Limiter Threshold 0dBu ± 3dB
Mic Limiter Range >= 15dB
Ω
Ω
Program Line Input
Maximum Level before Clipping >= 20dBu
Input Impedance >= 5K
Ω
Headset Output
Load Impedance >= 8
Output Impedance <= 25
Output Limiter Threshold +5dBu ± 3dB
Maximum Output Level before Distortion >= 17dBu
Ω
Ω
Speaker Output
Load Impedance >= 4
Max Output Level before 1% Distortion 20dBu ± 2dBu
Ω
Party Line Output
Off Noise < -74dBu
Output Impedance >10K
Ω
Party Line Input
Crosstalk < -60dB
Max level before Clipping >= 12dBu
Sidetone Null Capability > 25dB
Stage Announce/Balanced Line Out
Type Balanced
RM-702 TWO-CHANNEL REMOTE STA-
4-1
Output Impedance >= 200
Load Impedance >= 600
Ω
Ω
IFB/Hot Mic
Type Unbalanced
Output Impedance 180
Load Impedance >= 600
Ω
Ω
Frequency Response
Panel Mic - Party Line 600 - 10KHz ± 3dB
Headset Mic - Party Line 200 - 12KHz ± 3dB
Headset Mic - Line Out 200 - 12KHz ± 3dB
Program Input - Party Line 100 - 17KHz ± 3dB
Program Input - Headset Out 200 - 10KHz ± 3dB
Program Input - Speaker Out 300 - 10KHz ± 3dB
Party Line - Headset Out 200 - 10KHz ± 3dB
Party Line - Speaker Out 300 - 10KHz ± 3dB
Max Distortion
Panel Mic - Party Line <= 0.5%
Headset Mic - Party Line <= 0.5%
Headset Mic - Line Out <= 0.5%
Program Input - Party Line <= 0.2%
Program Input - Headset Out <= 0.2%
Program Input - Speaker Out <= 0.5%
Party Line - Headset Out <= 0.2%
Party Line - Speaker Out <= 0.5%
Noise
Panel Mic - Party Line < -65dBu
Headset Mic - Party Line < -70dBu
Headset Mic - Line Out < -55dBu
Program Input - Party Line < -85dBu
Program Input - Headset Out < -60dBu
Program Input - Speaker Out < -60dBu
Party Line - Headset Out < -50dBu
Party Line - Speaker Out < -50dBu
Max Gain
Panel Mic - Party Line >= 37dB
Headset Mic - Party Line 41dB ± 2dB
Headset Mic - Hot Mic Out 55dB ± 3dB
Headset Mic - Announce Out 55dB ± 3dB
Program Input - Party Line >= -16dB
Program Input - Headset Out >= 18dB
Program Input - Speaker Out >= 24dB
Party Line - Headset Out >= 34dB
Party Line - Speaker Out >= 40dB
4-2
RM-702 TWO-CHANNEL REMOTE STATION
Min Gain
Panel Mic - Party Line <= 25dB
Power
Input Voltage Range 20-30 VDC
Input Current (Idle) <= 90mA
Input Current (Max) <=110mA
Rear Panel Connectors
Intercom: (2) XLR-3M (1 per channel)
(2) XLR-3F (1 per channel)
Hot Mic / IFB Interface: (1) 1/4 in. (0.64 cm) phone jack
Accessory (1) DB-15F
Rear Panel Controls
(12) Option switches
Front Panel Connectors
Panel Mic: (1) 1/4 in. (0.64 cm) panel
mounting jack
Headset: (1) XLR-4M
Front Panel Controls & Indicators
(1) Panel / headset mic switch
(1) Announce button
(2) Program send level controls
(1) Program monitor level control
(2) Listen controls
(2) Sidetone null controls
(2) Talk buttons
(2) Call buttons
(1) Speaker ON-OFF switch
Environmental
Dimensions
Dimensions: 19 in. W x 1.75 in. H x 7.0 in. D
Wei ght
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
RM-702 TWO-CHANNEL REMOTE
32 - 122o F (0 - 50o C)
(483 mm x 44.5 mm x 178 mm)
4-3
are design-center specifications and are included for customer guidance and
to facilitate system installation. Actual operating performance may vary.
4-4
RM-702 TWO-CHANNEL REMOTE STATION
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.
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.
During the warranty period Clear-Com, or any service company authorized by
Clear-Com, will in a commercially reasonable time remedy defects in
materials, design, and workmanship free of charge by repairing, or should
Clear-Com in its discretion deem it necessary, replacing the product in
accordance with this limited warranty. In no event will Clear-Com be
responsible for incidental, consequential, or special loss or damage, however
caused.
WARRANTY PERIOD
The product may consist of several parts, each covered by a different warranty
period. The warranty periods are:
Both warranty and
non-warranty repairs are
available.
• Cables, accessories, components, and consumable items have a limited
warranty of 90 days.
• Headsets, handsets, microphones, and spare parts have a limited warranty
of one year.
• UHF wireless IFB products have a limited warranty of one year.
• UHF wireless intercom systems have a limited warranty of three years.
• All other Clear-Com and Drake brand systems and products, including
beltpacks, have a limited warranty of two years.
The warranty starts at the time of the product’s original purchase. The
warranty start date for contracts which include installation and
commissioning will commence from the earlier of date of the Site Acceptance
Test or three months from purchase.
TECHNICAL SUPPORT
To ensure complete and timely support to its customers, Clear-Com’s User
Support Center is staffed by qualified technical personnel. Telephone and
email technical support is offered worldwide by the User Support Center.
The User Support Center is available to Clear-Com’s customers during the
full course of their warranty period. Telephone support during the warranty
WARRANTY
i
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:
+1.510.337.6600 Email: CustomerServicesUS@clearcom.com
Europe, Middle East, and Africa Headquarters Cambridge, United
Kingdom Tel: +44 1223 815000 Email: SalesSupportEMEA@clearcom.com
Canada Office Quebec, Canada Tel: +1 (450) 653-9669
China Office Beijing Representative Office Beijing, P.R.China Tel: +8610
65811360 / 65815577
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. In these cases, you will have access to
telephone support 24 hours per day, 7 days per week.
WARRANTY REPAIRS AND RETURNS
Before returning equipment for repair, contact a User Support Center to obtain
a Return Material Authorization (RMA). Clear-Com representatives will give
you instructions and addresses for returning your equipment. You must ship
the equipment at your expense, and the support center will return the
equipment at Clear-Com’s expense.
For out-of-box failures, use the following contact information:
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
Canada Office Quebec, Canada Tel: +1 (450) 653-9669
ii
China Office Beijing Representative Office Beijing, P.R.China Tel: +8610
65811360 / 65815577
WARRANTY
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.
EXTENDED WARRANTY
If you purchase an Extended Warranty, you are also given access free of
charge to the User Support Center 24 hours a day, 7 days a week.
You can purchase an extended warranty at any time during the first two years
of ownership of the product. The purchase of an extended warranty extends to
five 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: Clear-Com does not offer warranty extensions on UHF wireless
intercom systems, or on any product with a 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.
LIABILITY
THE FOREGOING WARRANTY IS CLEAR-COM'S SOLE AND
EXCLUSIVE WARRANTY. THE IMPLIED WARRANTY OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
AND ANY OTHER REQUIRED IMPLIED WARRANTY SHALL EXPIRE
AT THE END OF THE WARRANTY PERIOD. THERE ARE NO OTHER
WARRANTIES (INCLUDING WITHOUT LIMITATION WARRANTIES
FOR CONSUMABLES AND OTHER SUPPLIES) OF ANY NATURE
WHATSOEVER, WHETHER ARISING IN CONTRACT, TORT,
NEGLIGENCE OF ANY DEGREE, STRICT LIABILITY OR
OTHERWISE, WITH RESPECT TO THE PRODUCTS OR ANY PART
THEREOF DELIVERED HEREUNDER, OR FOR ANY DAMAGES
AND/OR LOSSES (INCLUDING LOSS OF USE, REVENUE, AND/OR
WARRANTY
iii
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.
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
Clear-Com, including unreasonable or negligent operation, abuse, accident,
failure to follow instructions in the manual, defective or improperly
associated equipment, attempts at modification and repair not approved by
Clear-Com, and shipping damage. Products with their serial numbers
removed or defaced are not covered by this warranty.
This warranty does not include defects arising from installation (when not
performed by Clear-Com), lightning, power outages and fluctuations, air
conditioning failure, improper integration with non-approved components,
defects or failures of customer furnished components resulting in damage to
Clear-Com 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.
iv
WARRANTY
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