Clear-Com UPX-10 User manual

UPX-10 TRANSMITTER
INSTRUCTION MANUAL
WIRELESS IFB/CUE SYSTEM
RCV-2 RECEIVER

2000 Clear-Com Intercom Systems
All Rights Reserved
Part Number 810179 Rev. D
Clear-Com Intercom Systems
4065 Hollis Street
Emeryville, CA 94608-3505
U.S.A
Clear-Com is a registered trademark of Clear-Com Intercom Systems.
The Clear-Com Logo is a registered trademark of Clear-Com Intercom Systems.

Wireless IFB/Cue System i
CONTENTS
QUICK START 1-1
OPERATION 2-1
Description 2-1
UPX-10 Wireless Transmitter 2-1
RCV-2 Wireless Beltpack Receiver 2-2
(Models RCV-2, RCV-2S, RCV-2D)
Operation 2-2
UPX-10 Wireless Transmitter 2-2
RCV-2 Wireless Beltpack Receiver 2-3
(Models RCV-2, RCV-2S, RCV-2D) 2-3
INSTALLATION 3-1
Installing the UPX-10 Transmitter 3-1
Unpacking 3-1
Installing the System in the Rack 3-1
Attaching the Antenna 3-1
Connecting the System 3-2
Adjusting the Settings 3-3
Initial Settings 3-3
Audio Level Setting 3-4
Audio Frequency Response and Dynamic Range Adjustments 3-4
Installing the Clear-Com RCV-2 Wireless Beltpack Receiver 3-4
1. Install the battery 3-4
2. Check the power 3-5
3. Select the channel 3-5
4. Adjust the volume 3-5
5. Verify operation 3-5
MAINTENANCE 4-1
Troubleshooting 4-1
Battery 4-1
Interference 4-1
Antennas 4-2
SPECIFICATIONS 5-1
UPX-10 Wireless Transmitter 5-1
RCV-2 Wireless Receiver 5-2
CLEAR-COM LIMITED WARRANTY 6-1
Factory Service 6-1
Warranty Repair 6-1
Non-Warrantry Repair 6-2

Wireless IFB/Cue System

Wireless IFB/Cue System 1-1
QUICK START
1. Connect the external power supply (included) to the rear panel connector
labeled “DC input.” Then plug the power supply into an AC outlet.
2. Connect a microphone cable between the Clear-Com line input connector on
the rear panel and the output connector of a Clear-Com PIC-4000 IFB
controller, or alternately, to a Clear-Com intercom system.
3. Set the “input level” switch to the “line” position.
4. Set the rear panel “audio compression” switch to “soft ALC.”
5. Turn on the front panel “power” switch.
6. With an audio input applied to the unit, adjust the front panel “input level
adjust” control until the “audio level” bargraph meter indicates peaks in the 0
to +2 VU range.
7. Attach the earpiece or headset to the RCV-2 receiver.
8. Turn the receiver on by moving the slide switch to the F1 or F2 position.
A short flash of the red “Batt Low” LED indicates a good battery. A steady
LED indicates a weak battery. If the LED does not turn on at all, replace the
battery.
9. Verify operation by switching to F1 or F2 which selects one of two
frequencies.
10.Adjust the volume to a comfortable level.
See Chapter 3 for detailed setup information and for instructions on how to
optimize performance.
• Follow these instructions
to quickly get the system
up and running.
1

Wireless IFB/Cue System

Wireless IFB/Cue System 2-1
OPERATION
DESCRIPTION
UPX-10 WIRELESS TRANSMITTER
The UPX-10 wireless transmitter permits IFB/talent cueing, PL/intercom
listen-only monitoring and other audio monitoring applications for studio, field,
and theatre/live performance environments. The system consists of the UPX-10
base station transmitter and one or more RCV-2 portable beltpack receivers.
The UPX-10 base station is a single-channel rack-mounted VHF/FM
transmitter that sends a monaural audio signal to a compatible receiver such as
the Clear-Com RCV-2 portable VHF receiver. The receiver must exactly match
the transmitter frequency; refer to the identification labels on each piece of
equipment.
The UPX-10 accepts either a Clear-Com intercom line or IFB audio signal from
a Clear-Com IFB controller. It can optionally be set up to accept a mic- or
line-level audio input through the same XLR connector mounted on the rear
panel. The S0-239 RF output connector, sometimes called a UHF type, is also
mounted on the rear panel. The transmitter is powered by means of an external,
wall-mounted power supply provided with the UPX-10. It does not require or
draw power from the Clear-Com system.
The audio signal can be adjusted in various ways prior to transmission in order to
improve intelligibility in demanding acoustic environments. Two
screwdriver-accessed controls for adjusting the low and high frequencies are
located on the rear panel. In addition, the audio dynamic range can be limited by
either a 2:1 logarithmic compressor, or by a wide-range Automatic Level Control
(ALC) system, selected by means of a slide switch located on the rear panel. This
switch also has a third position for no dynamic range modification. Noise
reduction is achieved with a proprietary two-ended compander system that is
always active. The compander is compatible with Clear-Com’s RCV-2 portable
VHF receiver.
Note:The UPX-10 is shipped from the Clear-Com factory with internal jumpers set
to be compatible with Clear-Com wired intercom and IFB systems.
The UPX-10 can also accommodate a wide range of audio input levels. A
two-position slide switch attenuator on the rear panel selects between mic (-40 to
-10 dBu) and line (-10 to +20 dBu) levels. Fine audio level adjustment is made
by means of a 30-dB range-variable attenuator conveniently located on the front
panel. Also located on the front panel is an 8-segment LED VU meter to assist in
adjusting input levels.
The RF transmitter portion of the UPX-10 is a replaceable printed circuit board
assembly (PCB) that plugs into the main UPX-10 PCB. This crystal-controlled
transmitter is factory tuned to a specific frequency, and can easily be replaced
• The system consists of the
UPX-10 base station
transmitter and one or
more RCV-2 wireless
beltpack receivers.
• The UPX-10 accepts
either a Clear-Com
intercom line or IFB audio
signal from a Clear-Com
IFB controller.
• The audio signal can be
adjusted prior to
transmission.
2

Wireless IFB/Cue System
2-2
with another transmitter strip to allow operation on a different frequency. The
transmitter is available set to any of over 1,600 different frequencies between 169
MHz and 216 MHz. This frequency must be pre-set at the factory. It is not field
adjustable. Consult your dealer or the Clear-Com factory for details on
frequency coordination and changes.
A 1/4-wave “whip” antenna is provided with the UPX-10. Other antennas, such
as the Clear-Com Model 123U dipole antenna may be used to facilitate rack
installation or to improve coverage where the standard whip antenna would
otherwise be blocked or shielded by equipment cabinets or large objects.
RCV-2 WIRELESS BELTPACK RECEIVER
(MODELS RCV-2, RCV-2S, RCV-2D)
The Clear-Com RCV-2 wireless receiver is a miniature portable device normally
worn on the body of the user. Small and lightweight, it operates from a single
9-volt battery for 8-10 hours of operation. It features a low-battery indicator and
rechareable battery operation. It is useful for a variety of one-way personal
communications purposes.
The RCV-2 operates in the high-band VHF frequency range of 169 to 216
MHz. Systems employing the RCV-2 require licensing under FCC Part 90 or
Part 74. It is compatible with the Clear-Com UPX-10 and WBS-6/600
transmitters.
Note: Any change or modification made to this product without the express written
authorization and approval from Clear-Com could void the user’s authority to operate
this equipment.
The RCV-2 may be ordered with either one or two frequencies installed, and is
switchable between those frequencies for maximum flexibility.
OPERATION
UPX-10 TRANSMITTER
The UPX-10 transmitter is intended to be used only with the Clear-Com RCV-2
wireless beltpack receiver (Models RCV-2, RCV-2S, and RCV-2D). The UPX-10
transmitter is not compatible with receivers from other manufacturers.
Frequency Selection
You must choose a transmit frequency for the UPX-10 that can coexist with
other RF systems in the coverage area. This frequency must be specified at the
time of purchase. The Clear-Com factory provides a frequency coordination
service free of charge for this purpose.
Note: There are restrictions on the use of specific frequency ranges by certain types of
users. If you do not understand these restrictions or are uncertain of their applicability,
consult your Clear-Com dealer or the Clear-Com factory.
•NOTE: The UPX-10
transmitter is not
compatible with receivers
from other
manufacturers.
•TheRCV-2wireless
beltpack receiver may be
ordered with either one
or two frequencies
installed.
• Clear-Com provides a free
frequency coordination
service.

Wireless IFB/Cue System 2-3
RCV-2 WIRELESS BELTPACK RECEIVER
(MODELS RCV-2, RCV-2S, RCV-2D)
Receiver Parts
Headphones and Earpieces
The RCV-2 receiver is supplied with a generic earpiece for utility and testing
purposes. Devices with impedances as low as 8 Ohms may be used if extremely
high audio output is necessary, but battery life may be relatively short. Units with
impedances in the 25 to 125 Ohm range are preferred, as they will usually give
adequate output and longer battery life.
Battery
The RCV-2 requires a 9-volt battery. A good quality alkaline battery will provide
the best service and the highest reliability.
Rechargeable 9-volt batteries (“ni cads”) may be used in the RCV-2. Battery life
will be considerably shorter than for alkaline batteries, since the capacity of ni
cad batteries is only about 20% that of alkalines.
The RCV-2 has external contacts to permit recharging an internal ni cad battery.
An optional “drop-in” charger is available that allows the RCV-2 to be recharged
without removing the battery, and without disconnecting or dissassembling the
headset.
Antenna
The RCV-2 receiver uses the headset or earpiece cable as the antenna. For best
performance and range, the cable should be from 24 to 40 inches (0.6 to 1
meter) long. Coiling or twisting up the cable along its length may reduce the
range of the system greatly. If the headset cable is longer than 40 inches (1 m)
and you do not want to shorten it, roll up the excess cable about 36 inches
(0.9 m) away from the plug which connects it to the RCV-2.
Beltclip
The RCV-2 receiver is equipped with a sturdy metal clip that can be used to
attach it to a belt, pant pocket, strap, or the like. If you want to carry the unit in
a pocket, the belt clip is easily removed. Simply unscrew the two Phillips-head
screws, visible through the holes in the clip, and remove the clip. Be sure to save
the belt clip and screws in case the clip is needed again in the future.
•TheRCV-2receiveris
supplied with a generic
earpiece for utility and
testing purposes.
• If you have operational
questions not answered
by this manual, please
consult your sales
representative or the
Clear-Com factory.

Wireless IFB/Cue System
2-4

Wireless IFB/Cue System 3-1
INSTALLATION
INSTALLING THE UPX-10 TRANSMITTER
UNPACKING
Upon receiving your shipment, verify that the number of boxes shown as shipped
on the freight receipt has been received. Also check immediately for damage to
boxes which may have occurred during shipment. Notify both the dealer and the
freight carrier if damages or losses are found, so that claims may be expedited.
Unpack the unit or units carefully. We recommend saving the shipping cartons;
they are useful for reshipping the equipment at a future date. Should service ever
be required, remember that your authorized Clear-Com service center knows
your equipment best and has the training and test equipment necessary to restore
your equipment to its peak performance.
INSTALLING THE SYSTEM IN THE RACK
The UPX-10 can be mounted in a single rack space (1RU) of a standard 19-inch
(48 cm) rack, or it can operate as a freestanding unit.
For stand-alone operation: Peel off the protective paper from the four rubber
feet and attach to the bottom of the chassis at each corner.
For use in a rack: The detachable rack-mounted “ears” must first be installed on
the UPX-10 as follows:
1. Loosen, but do not remove, the four screws on the two sides of the unit that
hold the top cover onto the chassis.
2. Slide the top cover towards the rear of the unit as far as it will go–about 1/8
inch (3 mm).
3. Slide the smaller end of one rack-mounted ear into the grooves in each end of
the front panel. Be sure that the ear’s vertical-locking groove is facing the unit’s
rear.
4. Slide the top cover forward so that the front edges of the cover engage the
locking grooves in the rack-mounted ears.
5. Tighten the cover onto the chassis (four screws).
6. Verify that the rack-mounted ears are secure and will not slip out.
The UPX-10 is now ready to be installed in a standard 19-inch (48 cm) rack
using the screws and finish washers provided, or the equivalent metric hardware.
ATTACHING THE ANTENNA
Attach the whip antenna or the optional dipole antenna to the antenna
connector on the rear panel. Make certain that the antenna connector is screwed
on tightly and is not crossthreaded.
• You can place the
UPX-10 in a rack, or
operate it as a
freestanding unit.
• Installing the the
detachable rack-mounted
“ears” on the UPX-10
requires six steps.
• Attach the whip antenna
or the optional dipole
antenna to the connector
on the rear panel.
3

Wireless IFB/Cue System
3-2
For optimum antenna efficiency, the whip wire may be cut to length. Do not try
to cut the whip with wire cutters, as the whip is made from steel and will likely
destroy the wire cutters. Use a bench grinder or equivalent to grind through the
whip wire, being careful to use protective goggles and heavy gloves during the
grinding operation. The following chart lists the ideal lengths for various
operating frequencies. Lengths shown are for the exposed portion of the whip.
The actual cut length will be 0.175 inch (0.45 cm) longer. The values also differ
from the theoretical quarter wavelength due to the loading effects of the
connector barrel and the ball on the end of the whip.
The following table shows the approximate length of whip versus frequency:
For frequencies between chart entries, determine the length through
interpolation.
CONNECTING THE SYSTEM
The audio signal is transmitted to the UPX-10 through the XLR connector
located on the rear panel. The base station comes with the internal jumpers
programmed for use with a Clear-Com intercom system. The pin assignments
are consistent with that required by the intercom system. Alternatively, the base
station can be programmed for a standard audio signal. This is a balanced,
transformer-isolated input. The input is also DC isolated to 50 volts. For the
standard mic- or line-level input modes, the pin assignments on this connector
are as follows:
Pin 1: Shield
Pin 2: Audio +
Pin 3: Audio –
The programming jumpers are located inside the unit at the rear of the PCB,
near the XLR connector. Programming is as follows:
Frequency Length in inches Length in cm
170 MHz 17.8 inches 45.2 centimeters
180 MHz 17.1 inches 43.4 centimeters
190 MHz 16.3 inches 41.4 centimeters
200 MHz 15.6 inches 39.6 centimeters
210 MHz 15.0 inches 38.1 centimeters
Mode JP 1 JP 2
Balanced mic line BAL BAL
Clear-Com XLR 3 XLR 1
• For optimum antenna
efficiency, the whip wire
may be cut to length.
• Do not cut the whip
antenna with wire
cutters.
• The rear panel XLR
connector transmits the
audio signal to the
UPX-10.

Wireless IFB/Cue System 3-3
Finally, plug the correct external in-line or wall-type power supply for your
operating voltage into the AC power outlet. Then, insert the DC power
connector into the power jack located on the rear panel of the UPX-10. The user
may wish to provide DC power from a source other than the provided
wall-mounted power supply. In this case, connect +12 to +20 VDC (0.3 A
minimum) to the power connector on the rear of the UPX-10. A compatible
mating connector is the Switchcraft 760. When connecting external DC,
carefully observe the following polarity rules:
Power supply negative (-) to the outer conductor.
Power supply positive (+) to the inner conductor.
CAUTION: No internal circuit protection fuse is provided with the UPX-10.
The available current from the provided power supply is internally
impedance-limited and thermal-limited and therefore does not require
additional circuit protection. If the user provides DC power to the UPX-10
from a source other than the provided wall-mounted power supply, external
fusing provided by the user is strongly advised. Consult the Clear-Com factory
for more information.
The installation of the UPX-10 is now complete, and the unit is ready for
adjustment and operation.
ADJUSTING THE SETTINGS
There are no user-serviceable adjustments located inside the UPX-10. In
addition, normal setup and operation does not require internal access. Refer all
service and internal adjustments to qualified service personnel. Specifically, the
user may not make adjustments to the transmitter module. See Chapter 4,
“Troubleshooting” for more information.
The adjustment procedure below is for the normal balanced mic-level or
line-level input mode. The procedure for setting up the unit for use with
intercom systems is essentially identical, except that the mic/line switch is not
needed and is nonfunctional.
Initial Settings
Select the desired type of audio dynamic range limiting by means of the
three-position slide switch found on the rear panel. The recommended setting
for intercom or IFB use is “Soft ALC.” Other positions may be tried. The “Hard
ALC” position provides about 35 dB range of automatic level control with fixed
gain at low input levels to reduce system noise. The “Linear” position provides
no dynamic range limiting at all. The “Soft ALC” position provides soft, 2:1
logarithmic gain compression. Set the “low” and “high” frequency compensation
controls to the mid or “0” position.
•Caution: No internal
circuit protection fuse is
provided with the
UPX-10.
• Normal setup and
operation does not
require internal access to
the UPX-10.
• Refer all service and
internal adjustments to
qualified service
personnel.

Wireless IFB/Cue System
3-4
Audio Level Setting
The UPX-10 can accommodate program audio levels that are between -40 dBu
and +20 dBu, a 60 dB range. If you know the approximate level of the input
audio, set the mic/line switch as follows:
If the VU meter bargraph cannot be adjusted up to O VU with the MIC/LINE
switch in the MIC position, increase the audio level at the source.
Audio Frequency Response and Dynamic Range Adjustments
Listen to the program audio on a compatible VHF/FM receiver such as the
Clear-Com model RCV-2. Adjust the “low” and “high” audio compensation
controls for the desired audio frequency response. These controls provide + 10
dB adjustments to the low and high frequencies respectively. Unlike stereo tone
controls, these adjustments affect audio response well into the audio midrange.
The controls should be adjusted to achieve maximum intelligibility for the
particular listener group involved. Experiment with the dynamic range limiter
settings and select the position that best meets your audio quality and
intelligibility needs.
Note: Whenever a different dynamic range setting is selected, it will be necessary to
readjust the variable audio level control to achieve the O VU reading on the front
panel bargraph. If the VU meter consistently reads higher than O VU, the audio
signal may sound distorted; if the VU meter reads significantly lower than O VU, the
system will not be operating at the best possible signal-to-noise ratio.
Adjustment of the UPX-10 is now complete.
INSTALLING THE CLEAR-COM RCV-2 WIRELESS
BELTPACK RECEIVER
Note: The UPX-10 transmitter is intended for use only with the Clear-Com RCV-2
wireless beltpack receiver (Models RCV-2, RCV-2S, and RCV-2D).
To connect the Clear-Com RCV-2 receiver follow these steps:
1. INSTALL THE BATTERY
Install a 9-volt battery in the RCV-2. Slide the battery door on the side of the
unit downwards towards the bottom of the unit with your thumb. The battery
door has a grooved area to provide a good grip and the word “open” printed on
it. The door is opposite the two metal contacts on the side of the unit.
Program Audio
Level
Mic/Line Switch
Setting
-10 to +20 dBu LINE
-40 to +10 dBu MIC
• The UPX-10 can
accomodate program
audio levels between -40
dBu and +20 dBu.
• Adjust the UPX-10
controls to achieve
maximum intelligibility for
the particular listener
group involved.
• Install a 9-volt battery in
the RCV-2 receiver.

Wireless IFB/Cue System 3-5
The battery door will unlatch after being moved only a short distance. Once the
lower end of the door is free, swing it upwards on the hinge to expose the battery
compartment. The door is attached to the case and should not be removed.
Insert the battery into the battery compartment with the “plus” (+) terminal
towards the bottom of the unit. The battery should slide in freely. Fold the
battery door back down and press it against the side of the unit. If the door does
not close easily it is likely that the battery is inserted backwards. Slide the door
upward towards the top of the RCV-2 while holding the door closed. There
should only be slight resistance when sliding the door.
2. CHECK THE POWER
Turn on the power to the RCV-2 by sliding the switch on the top of the unit
towards the center of the unit to the “1” mark. If the battery is correctly inserted
and in good condition, the small LED indicator in the center of the receiver top
panel will flash briefly and then go out. If the LED does not flash, the battery is
not good or is not properly inserted. If the LED indicator stays on, the battery is
low and must be replaced.
3. SELECT THE CHANNEL
Select the desired channel (frequency) on the RCV-2. One or two frequencies
may be provided with your unit. If the identification label on the lower back of
the RCV-2 shows two different frequencies (i.e. 171.045 and 171.905) you have
a two-channel unit (RCV-2D). Select the desired frequency by sliding the switch
on the receiver top panel to “1” or “2” as appropriate. The frequency of the
RCV-2 receiver must match the frequency of the transmitter. If you are not
certain of the transmitter frequency, check the transmitter identification label to
make certain that you have a precise match with the RCV-2 channel.
If only one frequency is listed, you have a single channel unit (RCV-2S). In this
case, the switch on the RCV-2 may be in either the “1” or “2” position as both
positions will be the same channel.
4. ADJUST THE VOLUME
Adjust the volume control on the RCV-2 to minimum by turning the volume
control towards the headset jack and away from the switch until the stop is
reached. Do not attempt to force the control past the stop. Plug a headset or
earpiece into the jack on top of the RCV-2 and adjust the headset or earpiece for
a comfortable fit.
5. VERIFY OPERATION
Make certain that the companion transmitter is turned on and has audio input at
the approximate normal level. Slowly turn the RCV-2 volume control clockwise
towards the switch on the receiver top panel. If audio is not heard within the first
few degrees of rotation of the volume control, it is likely that something is wrong.
Do not continue to advance volume control. Check to see if the transmitter is on
and has audio input. Also check to make certain that the RCV-2 has a good
•TheRCV-2receiveris
built with either one or
two frequencies.
• The frequency of the
RCV-2 receiver must
match the frequency of
the transmitter.
• The identification label on
the transmitter will show
its frequency.

Wireless IFB/Cue System
3-6
battery installed and is set to the correct channel. Do not adjust the control to
maximum until audio is present and you are certain that you want the full output
of the receiver.
Caution: Extremely high sound levels are possible, especially when used with
efficient headsets and earpieces. Long-term exposure to high sound pressure
levels can cause permanent effects, including hearing loss.
The use of low impedance (8 to 20 Ohms) and high efficiency headsets and
earpieces with the RCV-2 should be limited to those with existing hearing
impairments. As a safety precaution, only higher impedance headsets and
earpieces (25-400 Ohms) should be used. In both cases, great caution should be
employed in using the maximum volume control setting on the PL-2.
The RCV-2 is now ready for use. Be certain to turn the switch on the top of the
unit.
•Caution: Extremely high
sound levels are possible,
especially when used with
efficient headsets and
earpieces.

Wireless IFB/Cue System 4-1
MAINTENANCE
TROUBLESHOOTING
The majority of difficulties with Clear-Com wireless systems are not due to
equipment failure. This equipment is fully tested before leaving the factory. In
most instances, problems are due to equipment application. This chapter
describes the most commonly encountered application problems. If you are
having difficulties, please review this information and take any necessary
corrective action before returning the equipment for repair.
BATTERY
The most common problems with the wireless system are those related to
batteries used in the RCV-2 wireless receiver. The low battery light on the
receiver will indicate when it is time to replace the battery. Clear-Com
recommends that only new, fresh Duracell MN1604 or Eveready Energizer No.
522 alkaline batteries be used. Rechargeable cell units (ni cads) commonly sold
are almost always 7.2 volts instead of 9 volts and provide only a fraction of an
hour of operation. The only acceptable rechargeable battery known to
Clear-Com is the Varta, which is a true 9-volt design. Even here, the usable life
will be much less than for a Duracell (usually two to three hours).
Battery contacts in the receivers must be clean and unbroken. It is strongly
recommended that the battery be checked prior to each use. It is also good
practice to try replacing the battery with a fresh unit in the event of any sort of
problem with the system, because a low battery may affect system operation in
subtle ways. When you turn off the power to the UPX-10 transmitter, always
turn off the power to the RCV-2 receiver as well, and remove the earpiece and
headset.
INTERFERENCE
Clear-Com receivers have been specifically designed to reject interference.
However, interfering signals may fall directly on the receiver frequency, making it
impossible to avoid problems completely.
Defective fluorescent lighting fixtures can generate extremely high amounts of
RF energy, which can cause interference. When such a situation exists, the fixture
has become a wideband transmitter and little can be done to the wireless
equipment to correct its problem that will not seriously degrade its performance.
A more serious problem is selection of operating frequencies, which are subject to
interference due to intermodulation. Fortunately, a proper initial selection or a
change of frequencies will almost always correct any such problem. Clear-Com
offers a free computerized frequency-selection service to purchasers of its
equipment. If the frequency of other wireless equipment in the area is known,
interference-free frequencies can be chosen. However, if equipment is added later
•Themostcommonly
encountered problems
involve the batteries used
in the RCV-2 wireless
receiver.
• It is strongly
recommended that the
battery in the receiver is
checked prior to each
use.
• Always turn off the power
to the RCV-2 when not in
use.
4

Wireless IFB/Cue System
4-2
without frequency coordination, an interference problem will likely exist. Should
this occur, contact the Clear-Com factory or your sales representative for
assistance.
ANTENNAS
Proper mounting and placement of antenna(s) is vitally important in wireless
systems. If overlooked, antennas could cause unnecessary problems. For best
results, always provide a clear, unobstructed line-of-sight path between the
transmitter and receiver(s).
While the antenna may be concealed behind fabric, thin plastic, acoustic tile or
thin plywood without significantly affecting performance, close proximity to
metallic objects should be avoided. These include: furniture, lighting fixtures,
scaffolding, electrical cables, metal structural members, aluminum window
frames, and equipment cabinets. Whip and dipole antennas require at least 5
inches (12.7 cm) of space from metal surfaces.
Other types of antennas may require greater spacing. Follow those
manufacturers’ recommendations.
Generally, it is advisable to contact the Clear-Com factory, your sales
representative, or distributor prior to returning equipment for repair. Often, the
problem can be resolved by telephone, avoiding downtime for unnecessary
returns. However, should repairs be necessary, Clear-Com will promptly correct
the problem and return the unit.
• If the frequency of other
wireless equipment in the
area is known,
interference-free
operating frequencies can
be chosen.
• Whip and dipole
antennas require at least
5 inches (12.7 cm) of
space from metal
surfaces.

Wireless IFB/Cue System 5-1
SPECIFICATIONS
UPX-10 WIRELESS TRANSMITTER
Product Description
VHF audio transmitter
Frequency Control
Single frequency, crystal controlled
Frequency Stability
±0.005%
Operating Frequency Range
169-216 MHz
RF Power Output
50 mW, maximum
Modulation
Direct FM, 45KOF3E
Maximum Deviation
±7.5 kHz
Deviation Limiter Type
Frequency-compensated active rectifier, voltage-controlled
amplifier
Deviation Limiter Range
20 dB after limiting starts
Audio Input
3-pin female XLR (mic/line mode)
Pin 1: ground
Pin 2: audio+
Pin 3: audio -
Intercom Mode
Pin 1: ground
Pin 2: +VDC
Pin 3: audio
Audio Input Level Select
Rear-panel mounted slide switch
Audio Input Level
Line: -10 to +20 dBu
Mic: -40 to -10 dBu
Audio Input Adjust Range
30 dB
Audio Frequency Compensation
Low: ± 10 dB; High: ± 10 dB
Front Panel Controls and Indicators
Power on/off switch
Power-on LED
Audio input level adjust
VU meter (8-segment LED)
Rear Panel Controls and Indicators
Audio input connector (3-pin XLR female)
Audio processing switch
Audio input level switch
Frequency compensation: high and low
DC power input
RF output (S0-239)
Power Required
12–24 VDC, 300 mA max, negative ground
Power Supply Provided
Wall-mount, 12 VDC, 500 mA, unregulated (120 VAC
standard, 240 VAC optional)
Packaging
19 in. (48 cm) rack-mount
17 in. W x 1.72 in. H x 5.1 D, excluding detachable rack-mont
ears
43 cm W x 4.4 cm H x 13 cm D, excluding detachable
rack-mount ears
Weight
3.2 lbs. (1.5 kg) without power supply
5

Wireless IFB/Cue System
5-2
RCV-2 RECEIVER
Frequency Range
169–216 MHz
Number of Frequencies
1 or 2, switch selectable
Frequency Stability
+0.005% or better
Deviation Acceptance
+7.5 kHz, maximum
Squelch
Internally adjustable, with hysterisis
Audio Processing
2:1 compander
Sensitivity
3 microvolts, minimum, for 50 dB SNR
Frequency Response
80–7200 Hz
Harmonic Distortion
1% typical, 1 kHz
Signal-to-Noise Ratio
78 dB, minimum
Audio Output
100 milliwatts, minimum, into 8 Ohms
Power
9-volt battery, accepts 9.2 to 6.3 VDC
Current Drain
40 milliamps, max, with 10 milliwatt audio output into 32
Ohms
Battery Charging
Provision for use with “drop-in” charge via external contacts
Controls
Power on/off
Frequency 1 or 2
Vo lu m e c o n tr o l
Indicator
“Low battery”
Audio Output Connector
Standard mono mini-jack
Antenna
Headset/earphone cable
Case Size
4 in. H x 2.5 in. W x 1.1 in. D
10.2 cm H x 6.4 cm W x 2.8 cm D
Weight
5 oz. (145 gm) with battery and belt clip