UCR110
UHF MULTI-FREQUENCY
COMPACT RECEIVER - EURO MODEL
OPERATING INSTRUCTIONS
and trouble-shooting guide
LECTROSONICS, INC.
Rio Rancho, NM
0885
INTRODUCTION
Thank you for selecting the Lectrosonics multi-frequency, UCR110 Receiver. The
UCR110 is the result of extensive engineering experience with the very latest microprocessor advancements and technology.
The Lectrosonics 110 System Receiver and companion transmitter are designed
expressly for the most discriminating videographer and for other wireless applications
needing superior audio quality, flexible operation, and outstanding durability. The
compact size of the receiver provides ease of integration with most any compact
video camera. The multi-frequency UCR110 Receiver and companion UM110 Transmitter feature simple and fast frequency selection from any one of 256 frequencies.
In the event of band interference the units can be reset to a clear channel fast
and easy.
The UCR110 Receiver is housed in an attractive, rugged, machined aluminum
package for lasting performance in abusive environments
Only the UCR110 Receiver is covered in this manual. The companion UM110 transmitter is covered in a separate manual. The UCR110 Receiver will operate with any
Lectrosonics UM110 Transmitter in the same frequency block.
TABLE OF CONTENTS
INTRODUCTION ................................................................................................... 2
GENERAL TECHNICAL DESCRIPTION .............................................................. 3
SAFETY NOTES................................................................................................... 4
FRONT PANEL CONTROLS & FUNCTIONS ....................................................... 4
SIDE PANEL CONTROLS & FUNCTIONS ........................................................... 5
OPERATING INSTRUCTIONS .............................................................................. 6
INDICATOR QUICK REFERENCE ....................................................................... 6
BATTERY INSTRUCTIONS .................................................................................. 7
TROUBLESHOOTING........................................................................................... 8
SPECIFICATIONS AND FEATURES ................................................................... 9
SERVICE AND REPAIR........................................................................ Back cover
WARRANTY ..........................................................................................Back cover
2
Compact Receiver
GENERAL TECHNICAL DESCRIPTION
The UCR110 Receiver is comprised of a number of functional subsystems as shown in Fig 1, Block Diagram,
Fig 2, Control Panel and Fig 3, Side Panel
GENERAL FEATURES
The multi-frequency UCR110 FM Receiver is designed to operate with the Lectrosonics UM110 Transmitter and
features microprocessor control of 256 frequencies of operation within each frequency block. Each block covers 25.5
MHz with 0.1 MHz frequency spacing. Up to 256 special frequencies and 0.025MHz spacing can be programmed into
a unit by the factory or by authorized service centers. Any one of thirteen different frequency blocks numbered 21
through 33 are factory available from 537.6 MHz to 865.0 MHz.
The receiver’s unique microcontroller design provides simple operation for audio level/limit LED monitoring, RF level
LED monitoring, squelch, easy on-the-fly frequency programming and low battery warning. The UCR110 Receiver uses
20 kHz FM deviation for efficient use of the bandwidth and dual band companding for clean quiet audio. The receiver
operates on one 9 Volt alkaline battery for up to 8 hours and features a blinking LED low battery indicator. The voltages
are internally regulated for stability. The receiver is housed in a compact, rugged, lightweight aluminum enclosure. The
unit features a durable integral swing-aside battery compartment door.
DUAL BAND COMPANDOR
Traditionally, compandors have been a source of distortion in wireless microphone systems. The basic problem with
conventional systems is that the attack and decay times are always a compromise. If the time constants are fast, high
frequency transients will not be distorted, but this will cause low frequency distortion. If the time constants are slower,
low frequency audio distortion will be low, but high frequency transients will then be distorted.
The 110 system introduces the proven Lectrosonics approach to solving this basic problem, called “dual-band
companding.”
There are actually two separate compandors in the 110 system, one for high frequencies and one for low frequencies.
A crossover network separates the frequency bands at 1kHz with a 6dB per octave slope, followed by separate high
and low frequency compandors. The attack and release times in the high frequency compandor are fast enough to keep
high frequency transient distortion at a low level, and the low frequency compandor uses slower time constants,
reducing low frequency distortion to well below that of a conventional compandor.
PRE-EMPHASIS/DE-EMPHASIS
The signal to noise ratio of the 110 system is extended by utilizing pre-emphasis (HF boost) in the transmitter and deemphasis (HF roll off) in the receiver. Pre-emphasis and de-emphasis in an FM radio system usually provides about a
10dB improvement in the signal to noise ratio of the system, but the high frequency boost in the transmitter must be
removed in a purely complementary manner or else the frequency response of the original audio signal will be altered.
The dual-band compandor in the 110 Series system essentially provides a dynamic pre-emphasis/de-emphasis
function with low distortion.
5V
Audio Level
Control
R
T
S
Output
Jack
RF
Filter
Memory
RF
Amplifier
Frequency Synthesizer
Mixer
Controller
Disc
RSSI
IF Amp/FM
Detector
Control
Panel LED's
Audio
Filter
Hi Freq
Compandor
Low Freq
Compandor
On/Off
9V
Battery
Regulator
Figure 1 - UCR110 Block Diagram
Rio Rancho, NM – USA
3
SAFETY NOTES
Excessive sound levels can cause permanent hearing damage.
1. Always adjust the volume to the lowest level before listening to unknown
transmissions.
2. Use the lowest reasonable level consistent with hearing safety.
3. Don’t use high sound levels in the earphone to overcome high ambient sound levels. That is absolutely foolish! Demand and use high isolation earphones.
4. Don’t expose your ears to sound levels that cause them to ring. If your ears do ring after exposure,
think of it as a
OSHA (Occupational Safety Health Administration) guidelines on the maximum allowable time expo-
sure to sound pressure levels that will cause hearing damage are as follows:
warning bell telling you not to do that again.
8 Hours at 90 dB SPL
4 Hours at 95 dB SPL
2 Hours at 100 dB SPL
1 Hour at 105 dB SPL
30 Mins at 110 dB SPL
15 Mins at 115 dB SPL
NEVER expose your ears to 120 dB SPL or higher! Damage will occur.
FRONT PANEL CONTROLS & FUNCTIONS
MODULATION LEDs
The two modulation LED’s Indicate the modulation (audio level) of the incoming
signal, and can be used for proper adjustment of the transmitter’s “MIC LEVEL” or
“AUDIO LEVEL”. The -20 LED glows when the transmitter modulation is at a high
enough level to produce a good audio signal-to-noise ratio. It will normally flicker, or
stay lit as you speak into the microphone. The 0dB lamp indicates a “peak,” showing
that the transmitter modulation is at maximum. Constant lighting of the 0dB LED
indicates that the audio gain in the transmitter may be set too high. It is normal and
desirable that you see an occasional flicker of the 0 dB lamp in typical use.
Figure 2
UCR110
ON/OFF POWER SWITCH
Control Panel
Turns the receiver power as supplied by the internal 9 volt battery.
POWER LED
The Power LED glows when the power switch is in the ON position and the battery is
good. The power LED starts blinking when the battery is becoming exhausted and
needs replacement. If the LED does not light up when the switch is turned on or
during operation, replace the battery. In normal operation a new alkaline battery will operate the receiver approximately
5 hours before the LED starts blinking and will continue operating for approximately another 3 hours before the LED
goes off. At that point the unit and the other LED’s will continue operating for another hour or so but with some degradation in performance. During the low battery blinking period the LED on time decreases as the battery becomes
depleated. See the chart on page 7.
LECTROSONICS
UCR 110
ON
OFF
0
RF
–20
LEVEL
OUT
4
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F01
2
3
4
5
6
7
8
A
B
C
D
E
F
Compact Receiver
9
The battery level is precision monitored by the internal microprocessor which also drives the POWER LED for
accurate battery condition.
IMPORTANT!
When the battery voltage drops below 6 Volts, the power LED will remain off, but the other
3 LEDs will light up and a rush of audio noise and distortion will be heard as the squelch
opens. This condition is normal, and is easily remedied by replacing the battery.
RF LED
Lights when the transmitter is turned on and the receiver has a strong RF signal. The RF LED will start blinking when
the RF carrier signal from the transmitter becomes too weak to produce a clean audio signal. The lamp will go out
completely when the RF signal is absent or extremely weak.
3.5mm MINI PHONE JACK
Provides audio output controlled by the AUDIO LEVEL control on the FRONT panel. Generally, the AUDIO LEVEL
control would be set to provide the proper output level to match the required level for your video camera or other
equipment.
The 3.5mm mini jack will accommodate a mono plug (tip & sleeve) or a stereo type jack (tip/ring & sleeve) without
harm to the unit. When using a pair of stereo headphones the audio will be mono but will drive both earphones in the
correct (binaural) phase.
The output at this mini connector jack is designed to also drive a standard impedance earphone, typically 30 Ohms
(most common) and usually provides adequate volume for setup and testing. The sound from a low impedance ear
phone (ie. 8 Ohms) will not be very loud and may be distorted at higher listening levels.
OUTPUT CONTROL
Attenuates the audio output level of the receiver to match the input requirements of the equipment with which it is
used. The 3.5mm Mini output jack on the front panel provides an audio output at adjustable levels for low or high
impedance, unbalanced inputs. At the extreme counter-clockwise position of the control knob, the output level of the
Mini jack will be -50dBV at full modulation. In the fully clockwise position, the output level will be 0dBV (1 Vrms) at full
modulation. intermediate settings are sometimes necessary due to the variations in different input compressors and
ALC (automatic level control) circuits on various VCR’s and audio inputs. The markings around the control knob are
provided simply as “memory markers;” they are not calibrated with reference to a specific output level.
ANTENNA
The antenna is a 1/4 wavelength 50 ohm flexible non-removable antenna made of durable sheathed bronze wire.
SIDE PANEL CONTROLS & FUNCTIONS
FREQUENCY ADJUST
These two rotary switches adjust the center frequency of the carrier. The left switch (COARSE)
changes the operating frequency by larger increments
and the right switch (FINE) changes it in small
increments per step. These steps are determined by
the programming in the unit. Refer to the chart of
settings provided with the unit. The receiver and
transmiter switches must be set to the same number/
letter combination for proper operation.
To gain access to these switches, slide the access
door sideways with a fingernail.
BLK 20 (BK)
512.0 - 537.5
F
E
D
C
B
A
9
0
1
7
8
COARSE
FREQUENCY
2
3
4
5
6
FINE
0
1
F
E
D
C
B
A
2
3
4
5
6
9
7
8
Figure 3 - UCR110 Side Panel
Rio Rancho, NM – USA
5
OPERATING INSTRUCTIONS
1. Install the battery.
2. Set the “FREQUENCY” switches on the side panel to match the switches on the Transmitter.
3. Connect the audio cable.
4. Set the front panel switch to ON. Check to see that the red POWER LED lights up.
5.
THIS IS PERHAPS THE MOST IMPORTANT STEP IN THE SET UP PROCEDURE. Adjust the
transmitter “gain”. See your transmitter manual (Operating Instructions section) for specific directions on the proper
gain adjustment of your particular transmitter.
6. Adjust the output control according to the type of input on your equipment. The input levels on different VCR’s and
PA equipment vary, which may require that you set the output LEVEL control in an intermediate position. Try
different settings and listen to the results. If the output of the receiver is too high, you may hear distortion or a loss
of the natural dynamics of the audio signal. If the output is too low, you may hear steady noise (hiss) along with the
audio. The UCR110 output was designed to drive camera line level inputs but can operate into camera MIC inputs if
the receiver output is reduced to prevent Automatic Limiting Control “pumping” in the camera. The output signal
level ranges from -50 dBV with the output control fully counter clockwise to 0 dBV with the output control fully
clockwise when the transmitter signal is at full modulation.
INDICATOR QUICK REFERENCE
(Refer to Controls and Functions section for more detailed descriptions)
RF - This LED lights up when the transmitter is turned on. This indicates that the receiver is getting an adequate RF
signal (carrier) from the transmitter.
POWER - This LED lights up when the receiver is switched on. It indicates proper battery voltage when the receiver is
using a battery. See chart on page 7.
MODULATION - The “-20” LED lights up when an audio signal is present at an adequate level to produce a good signal
to noise ratio. The “0dB” LED lights up when the audio level is high and the signal is being compressed in the transmitter. An extremely high audio level may cause distortion.
Review the transmitter instruction manual for proper adjustment and setup of the transmitter mic level or gain.
6
Compact Receiver
BATTERY INSTRUCTIONS
The battery you use in the receiver should be a 9 Volt alkaline or lithium, available almost everywhere. An alkaline
battery will provide up to 8 hours of operation and a lithium battery will provide up to 20 hours of operation. Carbon zinc
batteries, even if marked “heavy duty” will only provide about 2 hours of operation. Rechargeable batteries will only
operate the receiver for an hour or less. Make sure your batteries are marked
life is almost always caused by weak batteries or batteries of the wrong type.
“alkaline” or “lithium.” Short battery
A steady
need for a fresh battery. Continued use will further deplete the battery eventually causing the LED to automatically
turn itself off and remain off until a fresh battery is installed.
To replace the battery, open the bottom battery door cover with your thumb, rotate the door until it is perpendicular with
the case and allow the battery to fall out of the compartment into your hand. Observe the large and small holes in the
battery contact pad before inserting a new battery. Insert the contact end of the battery first, making sure the contacts
are aligned with the holes in the contact pad, and then swing the door closed. You will feel it snap into place when it is
fully closed.
“ON” LED corresponds to a fresh battery. The LED will blink to indicate a low battery condition and the
1
2
To open the battery
compartment door, push the
door up and away from the case
with your thumb, then swing
open.
Figure 4 - Battery Replacement
Hours Power LED
1 Solid On
2 Solid On
3 Solid On
4 Solid On
5 Solid On
6 Blinks 90% on, 10% off
7 Blinks 50% on, 50% off
8 Blinls 10% on, 90% off
9 Off (Replace battery)
Figure 5 - UCR110 Approximate Battery Life with Alkaline Battery
Rio Rancho, NM – USA
7
TROUBLESHOOTING
Before going through the following chart, be sure that you have a good battery in the receiver. The POWER LED
should glow brightly.
SYMPTOM POSSIBLE CAUSE
NO POWER LED 1) Receiver switch in “OFF” position
2) Dead or weak battery
3) Battery not installed
4) Battery installed backwards
NO RF LED 1) Transmitter not turned on
2) Transmitter battery dead
3) No microphone on the transmitter
4) Receiver antenna positioned incorrectly
5) Transmitter and Receiver on different frequencies (FREQUENCY
switches do not match transmitter switches)
RF LED ON BUT NO SOUND 1) Transmitter audio level set to low
AND NO MODULATION LEDS 2) Transmitter microphone not connected
MODULATION LED’s ON 1) Receiver LEVEL control turned down
BUT NO SOUND 2) Audio cable disconnected
DISTORTED SOUND 1) Transmitter Audio Level set too high (check mod lamps on
SHORT RANGE 1) Transmitter or receiver antenna not clear of obstructions
HISS AND NOISE -- AUDIBLE DROPOUTS 1) Transmitter gain (audio level) far too low.
HISS AND NOISE – PUMPING 1) Camera or recorder has automatic level control. Use line
3) Microphone switch in “OFF” position
4) Check transmitter modulation LEDs for possible
transmitter problem
3) Recorder or sound system off or not properly adjusted
Transmitter)
2) Weak battery
2) Receiver antenna obstructed or damaged.
3) Transmitter antenna obstructed or damaged.
4) Operating range too great.
level input on camera or recorder. If there is only a mic
input, reduce the receiver output to near minimum.
8
Compact Receiver
SPECIFICATIONS AND FEATURES
Operating frequencies: 537.600 MHz to 865.000 MHz
Number of frequencies: 256 per block
Channel spacing: 100 kHz, 25 kHz programmable for Europe
Frequency control: Crystal Controlled Phase Locked Loop
Sensitivity: 1 uv (20 dB SINAD)
Signal/Noise ratio: 105 dB (system)
Squelch quieting: 90 dB
AM rejection: 50 dB, 10 uv to 100 mv
Modulation acceptance: +/-20 kHz
Spurious rejection: Greater than 70 dB
Third order intercept: 0 dBm
Frequency response: 50 Hz to 18 kHz, (±2db)
Distortion: 1% max at 50% modulation (system)
Audio output: 0 dBv (1 Vrms) UNBALANCED into 600 ohms
Antenna: 1/4 wave vertical (fixed)
Front panel controls: Single knob controls Audio Output Level
LED Indicators: Power (red), RF (green), Level (green), Limit (red)
Power requirement: Single 9V Alkaline Battery for approximately 8 hours operation.
Power consumption: 60 ma.
Weight: 7.3 oz with battery
Size: 3.6 x 2.4 x 0.8 inches (housing only, belt clip and
knob extend beyond the housing.)
Specifications subject to change without notice.
This product meets the CE Compliance Standards - ETS 300 445; January
1996. A copy of the Declaration of Conformity may be requested from your
dealer or by contacting the factory directly:
Lectrosonics, Inc.
Marketing Department
581 Laser Rd. NE, Rio Rancho, NM 87124 USA
tel: 505-892-4501 fax: 505-892-6243 e-mail: marketing@lectrosonics.com
Rio Rancho, NM – USA
9
LIMITED ONE YEAR WARRANTY
LIMITED ONE YEAR WARRANTY
The equipment is warranted for one year from date of purchase against defects in
materials or workmanship provided it was purchased from an authorized dealer. This
warranty does not cover equipment which has been abused or damaged by careless
handling or shipping. This warranty does not apply to used or demonstrator equipment.
Should any defect develop, Lectrosonics, Inc. will, at our option, repair or replace any
defective parts without charge for either parts or labor. If Lectrosonics, Inc. cannot
correct the defect in your equipment, it will be replaced at no charge with a similar new
item. Lectrosonics, Inc. will pay for the cost of returning your equipment to you.
This warranty applies only to items returned to Lectrosonics, Inc. or an authorized
dealer, shipping costs prepaid, within one year from the date of purchase.
This Limited Warranty is governed by the laws of the State of New Mexico. It states the
entire liablility of Lectrosonics Inc. and the entire remedy of the purchaser for any
breach of warranty as outlined above. NEITHER LECTROSONICS, INC. NOR
ANYONE INVOLVED IN THE PRODUCTION OR DELIVERY OF THE EQUIPMENT
SHALL BE LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, CONSEQUENTIAL,
OR INCIDENTAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE
THIS EQUIPMENT EVEN IF LECTROSONICS, INC. HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES. IN NO EVENT SHALL THE LIABILITY OF
LECTROSONICS, INC. EXCEED THE PURCHASE PRICE OF ANY DEFECTIVE
EQUIPMENT.
This warranty gives you specific legal rights. You may have additional legal rights which
vary from state to state.
SERVICE AND REPAIR
If your system malfunctions, you should attempt to correct or isolate the trouble before concluding that the equipment
needs repair. Make sure you have followed the setup procedure and operating instructions. Check out the interconnecting cords and then go through the TROUBLESHOOTING section in the manual
We strongly recommend that you do not try to repair the equipment yourself and do not have the local repair shop
attempt anything other than the simplest repair. If the repair is more complicated than a broken wire or loose connection, send the unit to the factory for repair and service. Don’t attempt to adjust any controls inside the units. Once set
at the factory, the various controls and trimmers do not drift with age or vibration and never require readjustment.
There are no adjustments inside that will make a malfunctioning unit start working.
LECTROSONICS, INC.
581 LASER ROAD
RIO RANCHO, NM 87124 USA
July 12, 2001
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