Clear-Com RM702 Users Manual
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. China 100022
Clear-Com is a registered trademark of Vitec Group Communications.
The Clear-Com Logo is a registered trademark of Vitec Group Communications.
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 STATION
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. WA RN I NG : 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
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.
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 remains constant, and
does not fluctuate as stations leave and join the network.
RM-702 TWO-CHANNEL REMOTE STATION
1-1
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.
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
1-2
RM-702 TWO-CHANNEL REMOTE STATION
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.
Panel
Microphone
Panel Mic
MIC
Select
Switch
Headset
Panel
Headset
Announce
Panel Mic
Headset
Program
Button
Announce
Level A
Channel A
Vol ume
Volume
Level
Channel A
Sidetone
Tal k
Buttons
Channel A Channel B
Sidetone
Null
Call
Buttons
Talk
Call
Channel B
Sidetone
Channel B
Sidetone
Vol ume
Null
ProgramProgram
Volum e
Level
Program
Monitor
Level
Program
Level
Program
Level B
Speaker
Switch
On
Off
Speaker
2-Channel
Remote Station
RM-702
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.
• SPEAKER DIP FUNCTION: Pressing either talk button will reduce the
output level of the speaker by a set amount to avoid feedback.
RM-702 TWO-CHANNEL REMOTE STATION
1-3
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
The mic select switch enables the operator to select which microphone is active.
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.
1-4
RM-702 TWO-CHANNEL REMOTE STATION
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 STATION
1-5
1-6
RM-702 TWO-CHANNEL REMOTE STATION
Loading...