UCR205D
DIVERSITY UHF RECEIVER
OPERATING INSTRUCTIONS
and trouble-shooting guide
LECTROSONICS, INC.
Rio Rancho, NM
www.lectrosonics.com
TABLE OF CONTENTS
GENERAL TECHNICAL DESCRIPTION ................................................................. 3
FRONT PANEL CONTROLS AND FUNCTIONS ..................................................... 6
REAR PANEL CONTROLS AND FUNCTIONS ....................................................... 7
ANTENNA USE AND PLACEMENT ........................................................................ 8
INSTALLATION AND OPERATING INSTRUCTIONS ............................................. 9
UCR205D REPLACEMENT PARTS and ACCESSORIES ...................................... 9
TROUBLESHOOTING ........................................................................................... 10
SPECIFICATIONS AND FEATURES .................................................................... 11
SERVICE AND REPAIR ........................................................................................ 12
RETURNING UNITS FOR REPAIR ....................................................................... 12
WARRANTY ............................................................................................ Back cover
2
UHF Wireless Diversity Receiver
T
GENERAL TECHNICAL DESCRIPTION
The UCR205D is a portable, high performance, dual-conversion, frequency synthesized, UHF receiver. The RF performance
is extremely stable over a very wide temperature range, making
the UCR205D perfectly suited to the rough environmental conditions found in the field. The proprietary audio processing
includes a dual-band compandor for very low distortion and a
superior signal to noise ratio. The squelch system is operated
by a separate pilot tone and mutes the audio output directly at
the output connector. The audio output is calibrated for exact
level matching, with a ten LED bar graph meter.
DIVERSITY RECEPTION
The antenna phase switching diversity technique was chosen in
order to keep the receiver compact enough for camera mounted
or shoulder bag applications. This diversity reception technique effectively minimizes dropouts in short range situations
where multi-path reflections can cause serious problems. The
optimum diversity reception is realized with the diversity antenna placed away from the receiver, however, dropouts are
significantly reduced even if the two antennas are mounted
directly on the receiver.
RF SECTION
The problem posed to the design staff was to retain the RF
reliability of the Lectrosonics’ fixed frequency designs but add
the flexibility of a frequency agile design. The universal (and
poor) way to build frequency agile systems is to design a wide
open front end that will pass any frequency within the tuning
range of the system. This leads to very poor RF performance
with lots of interference, driving the user to switch frequencies
in an attempt to sidestep the interference. This makes frequency agile receivers a self fulfilling system; you have to use
the frequency agility to get away from the problems caused by
the frequency agile design compromises.
The problem of frequency agility is further compounded when
you realize that frequency changes “on the fly” cannot be made
on any type of wireless system. For example, if there is suddenly an interference problem with a system in use, on stage for
instance, a frequency change cannot be made without interrupting the program. Basically, the show must go on. In
multi-channel applications, changing the frequency of one sys-
tem will usually produce all kinds of new intermodulation
problems with the other systems operating in the same location.
Frequency agility is not the universal panacea for interference
problems. It is only another tool and a limited tool at that. The
first line of defense must be the system’s basic immunity to
interference. That required a new look at frequency agile receiver design.
FREQUENCY TRACKING FRONT-END
Our solution to the wide open front end problem was to design
a selective front end that can be tuned to the frequency in use.
Since we wanted this front end to be equivalent to our fixed
frequency front ends, this was a daunting task. Lectrosonics has
always used front ends with more sections and much more
selectivity than any other wireless manufacturer. The final
design consisted of a total of 6 transmission line resonators with
variable capacitance applied to each resonator by the hexadecimal switches.
This sophistication produced a front end that was as selective as
fixed frequency designs. The next step to improve the front end
was to use good old fashioned “brute force.”
HIGH CURRENT LOW NOISE AMPLIFIERS
The gain stages in the front end use some rather special transistors in a feedback regulated high current circuit that combine
three parameters that are generally at odds with one another.
These are: low noise, low gain and relatively high power. It is
easy to understand the advantages of low noise and high power
capability but why is low gain desirable? The answer is that in
a receiver, low gain allows the front end to handle stronger RF
signals without output overload, which is “increased headroom,” so to speak. The result of a design that takes all three of
these parameters into consideration at once, is a low noise RF
amplifier with a sensitivity rating equal or better than the best
conventional design with a hundred times less susceptibility to
intermodulation interference.
Combining the high power gain stages with the tracking front
end produces a receiver that is unusually immune to single and
multiple interfering signals close to the operating frequency
and in addition strongly rejects signals that are much farther
away.
ANTENNA
SWITCHING
RF MODULE
FILTER
FREQ
SWITCHES
AMP
uP
FILTER
uP
SYNTHESIZER
RF LEVEL
HI-LEVEL
DIODE MIXER
455KHZ
BP
FILTER
2ND MIXER
&
IF AMP
XTAL
CONTROLLED
2ND
OSCILLATOR
LEDs
COUNTING
DETECTOR
50KHz
LP FILTER
23 KHZ
LP
FILTER
VARIABLE
CUT-OFF
LP FILTER
EXPANDER
EXPANDER
SAW
FILTER
70 MHz
IF AMP
AMP
FILTER
VCO
FILTER
uP
2
E PROM
1ST
LOCAL
OSCILLATOR
Rio Rancho, NM – USA
BLOCK DIAGRAM
2:1
TREBLE
AUDIO
AMP
2:1
BASS
PILOT
TONE
MUTE
uP
TO DATA
DISPLAY
HEADPHONE
OUT
OUTPUT
LEVEL
ADJUST
3
XLR
OU
UCR205D
DOUBLE BALANCED DIODE MIXERS
In all wireless receivers, a mixer is used to convert the carrier
frequency to the IF frequency where most of the filtering and
gain in the receiver takes place. After doing all the right things
in the front end, it would be a shame to waste the performance
with a second rate mixer. In other designs that is exactly what
happens since mediocre mixers cause more intermodulation
problems than mediocre front ends. The only solution was a
high power, double balanced diode mixer driven by a local
oscillator with more output power than most wireless transmitters (50 mW). The mixer in the UCR205D produces output at
only the sum and difference signals, with minimal spurious
signals. This mixer offers a very high overload threshold and a
high degree of isolation between ports. The IF output of this
mixer is at 71 MHz which is unusually high for a wireless
receiver. This high frequency was chosen to increase the image
rejection in the front end to as high or a higher level than our
fixed frequency designs. The mixer is followed by high current,
low noise amplifiers and SAW filters to preserve the superior RF
performance.
SURFACE ACOUSTICWAVE FILTER
The UCR205D is unique in that it uses state of the art SAW
filters in each IF section. The SAW filters are the only filter that
can combine sharp skirts, constant group delay, and wide bandwidth in one filter. Though expensive, this special type of filter
allows us to follow the basic receiver rule of doing the primary
filtering as early as possible, at as high a frequency as possible
and before high gain is applied to the signal. Since these filters
are made of quartz, they are very temperature stable. Conventional LC filters at these frequencies don’t begin to perform as
well and in addition would drift unacceptably in the elevated
temperatures of an equipment rack. After following the rule in a
rigorous way, and due to the sharp filtering action of the SAW
filters, the 71MHz signal is converted to the low frequency of
455 kHz. Lots of gain is then applied in a conventional IC and
the signal is then converted to audio. 455 kHz is very unconventional for a second IF in a wide deviation (±50 kHz) system.
We chose to use 455 kHz to obtain an outstanding AM rejection
figure over a very wide range of signal strengths and to produce
an excellent noise improvement at low signal strengths (capture ratio). To use an IF at 455 kHz requires an unusual circuit to
convert the IF to audio.
DIGITAL PULSE COUNTING DETECTOR
The UCR205D receiver uses an advanced digital pulse detector
to demodulate the FM signal, rather than a conventional quadrature detector. The common problem with quadrature detectors
is thermal drift, particularly those that operate at higher frequencies like 10.7 MHz. Though the quadrature detectors may
work well at room temperature, if they are not carefully compensated, they will produce amplitude changes and audio
distortion in the elevated temperatures of an equipment rack.
Some manufacturers try to get around the problem by tuning
their systems at higher temperatures after they’ve been on for
some time. This just means that for the first hours in a cool room
the receiver is well out of specification or after a few hours in a
hot rack.
The UCR205D design presents an elegantly simple, yet highly
effective solution to this age old problem. The UCR205D
detector basically works like this: A stream of precision pulses
is generated at 455KHz locked to the FM signal coming from
the 455 kHz IF section. The pulse width is constant, but the
timing between pulses varies with the frequency shift of the FM
signal. The integrated voltage of the pulses within any given
time interval varies in direct proportion to the frequency modulation of the radio signal. Another way of describing it is that as
the FM modulation increases the frequency, the circuit produces more pulses and as the modulation decreases the
frequency, the circuit produces fewer pulses. More pulses produces a higher voltage and fewer pulses a lower voltage. The
resultant varying voltage is the audio signal.
This type of detector eliminates the traditional problems with
quadrature detectors and provides very low audio distortion,
high temperature stability and stable audio level. The counting
detector also adds additional AM rejection, in addition to the
limiting in the IF section. The amplitude of the pulses is
constant, so level differences in the IF signal do not affect the
pulse.
TRI MODE DYNAMIC FILTER
The audio signal is passed through a “dynamic noise reduction
circuit”. The cutoff frequency of this filter is varied automatically by measuring the amplitude and frequency of the audio
signal and the quality of the RF signal. The audio bandwidth is
held only to that point necessary to pass the highest frequency
audio signal present at the time. If the RF level is weak, then the
filter becomes more aggressive. This results in a dramatic
reduction of “hiss” at all times. During passages with a high
frequency content, this filter gets completely “out of the way”
and passes the signal with no decrease in high-frequency response. Keep in mind that if hiss is added to a signal, there is a
psycho acoustic effect that makes the sound seem brighter. The
other side of this is that if hiss is removed from a signal it will
sound duller. Basically the ear’s detection apparatus is presensitized to high frequency sounds by small amounts of high
frequency hiss. Consider this effect when making a judgment
about the sound quality of various wireless systems and this
particular filter. We have satisfied ourselves through elaborate
tests that this filter is totally transparent.
PILOT TONE MUTE
The UCR205D uses a pilot tone muting technique in order to
protect against the reception of stray signals. The Lectrosonics
transmitter adds an inaudible signal, known as the pilot tone, to
the transmitted signal. The receiver detects (and removes) the
pilot tone, and is thus able to identify the desired signal and
mute all others.
With the power switch in the normal (“ON”) position, receive
audio is muted unless a proper pilot tone is detected. The pilot
tone must be present for approximately one second before the
signal is accepted.
In the “PILOT OFF” position, received audio remains unmuted
regardless of the presence or absence of a pilot tone. This
4
position is useful for locating a clear frequency, since any
potential interference may be heard. It may also be used in
situations where squelching behavior is undesirable. The “PILOT OFF” position disables the squelch, as described below.
SQUELCH
The UCR205D employs a sophisticated squelching system in
an attempt to deliver the cleanest possible audio during marginal conditions of reception. Any squelching system faces
inevitable trade-offs: squelch too much and valuable audio
information may be lost, squelch too little and excessive noise
may be heard; respond too rapidly and the audio sounds
“choppy”, respond too sluggishly and syllables or entire words
are cut off.
The UCR205D combines several techniques to achieve an optimal balance, removing distracting noise, without the squelching
action itself becoming a distraction. One of these techniques
involves waiting for a word or syllable to complete before
squelching. Another incorporates recent squelching history
and recent signal strength, adjusting squelching behavior dynamically for the most serviceable result under variable
conditions. Using these and other techniques, the UCR205D
can deliver acceptable audio quality from otherwise unusable
signals.
UHF Wireless Diversity Receiver
In the “PILOT OFF” position, the squelch system is disabled.
Received audio remains unmuted at all times with this setting.
OUTPUT LEVEL ADJUST AND RANGE SWITCH
The front panel Output control will adjust the audio output
within the range set by the Lo/Mid/Hi range switch (located on
the back panel.) In the Lo position the adjustment range is from
–50dBm to –20dBm, the Mid position (center) allows an adjustment from –30dBm to 0dBm, and the Hi position sets the
audio output to a fixed +8dBm with no front panel control.
POWER SUPPLY
The UCR205D may be operated from an external 10 to 16.5
VDC source. The power supply has a built in Poly-Fuse to
protect the unit. This fuse resets if the power supply is disconnected for about 15 seconds.
Rio Rancho, NM – USA
5
FRONT PANEL CONTROLS AND FUNCTIONS
POWER LED
When lit, this LED indicates that power is applied to the
UCR205D and adequate voltage is present to operate the unit.
PILOT LED
The audio output muting (squelch) function of the UCR205D is
controlled by a 32kHz tone modulation of the RF carrier. The
audio output is muted until this tone is present. This green LED
will remain on as long as the receiver audio is enabled by the
pilot tone.
TRANSMITTER MOD LEVEL METER
When the meter function switch is in the Mod position, the
modulation (audio level) of the incoming signal is indicated by
a fast responding LED strip. The strip is calibrated in 6dB steps
over an expanded scale (54dB) which provides an extremely
accurate visual “picture” of the signal dynamics, even at a
distance away from the receiver. Audio signal peaks easily
exceed the response time of VU meters, however, the LED strip
is fast enough to track even brief transients.
RF LEVEL INDICATORS
With the meter function switch in the RF position, the LED strip
indicates the level of the incoming RF signals. The LED strips
are calibrated to provide accurate indications from 1uV to 1mV.
The LEDs are highly visible from a distance, making antenna
set up more accurate. The LED strip is especially useful in
“troubleshooting” difficult antenna installations.
POWER SWITCH (and PILOT DISABLE)
This slide switch, and its corrosponding LED indicator, switches
the receiver from Off to On with Pilot enabled or ON with Pilot
disabled. The pilot LED will glow green when pilot tone is
present, With the switch in the “ON (Pilot Off)” position, the
LED will glow red. At turn on and off there is a delay built into
the receiver to allow various stages to stabilize before the audio
output is activated. This will prevent an audio “thump” when
powering up the receiver.
PILOT TONE DISABLE
The Power switch on the front panel is the Pilot Tone Disable.
This is a three position switch. The position toward the right (as
seen looking straight at the front panel) is the normal operating
position and allows the pilot tone to enable or disable the
receiver audio output. The other position, toward the left, will
disable the pilot tone action and will cause the receiver audio
output to always be enabled, even in the absence of a transmitter signal. This position is only used for troubleshooting and
should never be set during actual use. When the pilot tone is
disabled with this switch, the Mod meter on the front panel is
also disabled.
AUDIO OUTPUT LEVEL CONTROL
The front panel Audio Output Level control will adjust the
audio output within the range set by the Lo/Mid/Hi range
switch (located on the rear panel.) In the Low position the
adjustment range is from –50dBm to –20dBm, the High position (center) allows an adjustment from –30dBm to 0dBm, and
the Fixed position sets the audio output to a fixed +8dBm with
no front panel control.
ANTENNA CONNECTORS
These are standard 50 Ohm BNC type jacks for the RF input to
the receiver. The left jack is the main antenna (0) and the right
jack is for the diversity antenna (180).
ANTENNA PHASE LEDs
These two LEDs labeled “0” and “180” show the phase difference of the signals being received at the two antennas.
POWER
MAIN DIVERSITY
ON
MOD
RF
1uV
(PILOT OFF)
-42
-36 -30
10uV
OFF
AUDIO OUT
ON
-12-18-24
100uV
PILOT
-6
0dB
1mV
0 180
6
UHF Wireless Diversity Receiver
REAR PANEL CONTROLS AND FUNCTIONS
DC IN JACK
The UCR205D can be powered from external 10 to 16.5 Volts
DC applied directly to this jack, or conventional 110 VAC
sources via the supplied CH20 adapter. The UCR205D is protected from reverse polarity conditions which prevents damage
if a positive ground power source is applied. The center pin of
this jack is POSITIVE. This power connector is threaded to
allow the plug to be locked to prevent accidental pull-out.
AUDIO OUTPUT XLR JACK
This jack is a standard 3 pin XLR connector. For balanced
applications, Audio High is on pin 2, audio Low is on pin 3, and
audio Common is pin 1. For unbalanced use, the signal is
developed between pin 2 (Audio High) and pin 1 (Audio Common or Ground.) It’s not necessary or desirable to ground pin 3.
(The output is balanced and center tapped.)
MONITOR
This is an audio output to drive a wide variety of different types
of headphones. It is also usable as a second high quality audio
output to drive recorders or external audio devices. The level at
this jack is independantly adjustable with the associated knob.
RANGE SWITCH
The audio output range switch is located on the rear panel and
is the switch nearest the front panel. This switch controls the
range of adjustment of the front panel Audio Output control. In
the Low position the adjustment range is from –50dBm to –
20dBm, the High position allows an adjustment from –30dBm
to 0dBm, and the Fixed position sets the audio output to a fixed
+8dBm with no front panel control.
0
1
F
2
E
D
C
B
6
A
9
7
8
1.6MHz
MONITOR
AUDIO OUT
LO MID HI
1 2
0
1
F
2
E
3
3
D
C
4
4
B
5
5
6
A
9
7
8
100kHz
LECTROSONICS
Rio Rancho, NM – USA
3
CH20
12VDC
7
ANTENNA USE AND PLACEMENT
There are two remote antenna assemblies included with this
receiver. Position the antennas at least three or four feet apart
and so that they are not within 3 or 4 feet of large metal surfaces.
If this is not possible, try to position the antennas so that they
are as far away from the metal surface as is practical. It is also
good to position the receiver so that there is a direct “line of
sight” between the transmitter and the receiver antenna. In
situations where the operating range is less than about 100 feet,
the antenna positioning is much less critical. The antennas can
also be configured with one whip mounted directly onto the
rear panel of the UCR205D receiver, and the other one mounted
remotely.
A wireless transmitter sends a radio signal out in all directions.
This signal will often bounce off nearby walls, ceilings, etc. and
a strong reflection can arrive at the receiver antenna along with
the direct signal. If the direct and reflected signals are out of
phase with each other a cancellation may occur. The result
would be a “drop-out.” A drop-out sounds like either audible
noise (hiss), or in severe cases, may result in a complete loss of
the carrier and the sound when the transmitter is positioned in
certain locations in the room. A drop-out normally sounds like
“hiss” or a “swishing” sound. Moving the transmitter even a
few inches will change the sound of the hum or hiss, or eliminate it. A drop-out situation may be either better or worse as the
crowd fills and/or leaves the room, or when the transmitter or
receiver is operated in a different location.
The UCR205D receiver offers a sophisticated diversity design
which overcomes drop-out problems in almost any imaginable
situation. In the event, however, that you do encounter a dropout problem, first try moving the antenna at least 3 or 4 feet from
where it was. This may alleviate the drop-out problem on that
antenna. If drop-outs are still a problem, try moving the antenna to an entirely different location in the room or moving the
antennas in closer to the transmitter location.
Lectrosonics transmitters radiate power very efficiently, and the
receivers are very sensitive. This reduces drop-outs to an insignificant level. If, however, you do encounter drop-outs
frequently, call the factory or consult your dealer. There is
probably a simple solution.
TRANSMITTER
REFLECTIVE SURFACE
INDIRECT SIGNAL
DIRECT SIGNAL
DIRECT SIGNAL
RECEIVER
INDIRECT SIGNAL
PHASE
CANCELLATION
MULTI-PATH DROPOUT
8
UHF Wireless Diversity Receiver
INSTALLATION AND OPERATING INSTRUCTIONS
1. Connect the power cord.
2. Attach the antennas.
3. Connect the audio cable to the audio output XLR.
4. Set the front panel Audio Output Level control to minimum and set the Power switch to ON (right position.) Check to see that
the front panel Power LED lights up.
5. Adjust the transmitter gain. THIS IS PERHAPS THE MOST IMPORTANT STEP IN THE SET UP PROCEDURE. See your
transmitter manual (Operating Instructions section) for details on how to adjust the transmitter gain. In general, adjust the
transmitter gain so that the voice peaks will cause the 0dB LED on the front of the receiver to light on the loudest peak audio
levels. This will result in the best possible signal to noise ratio for the system without causing overload distortion.
6. Adjust the Audio Output control according to the type of input on your equipment. The Range switch sets the adjustment range
of the front panel Audio Output control and has three positions.
Low: The adjustment range is from –50dBm to –20dBm.
Mid: Allows an adjustment from –30dBm to 0dBm
High: Sets the audio output to a fixed +8dBm with no front panel control.
The input levels of different cameras, VCRs, and PA equipment vary, which may require that you set the Audio Output control
to 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 UCR205D audio output is designed to drive any audio input device from microphone level to +8dBm line
level.
Note:
When using the +8 dBm HI position of the output range switch, do not ground pin 2 or pin 3 of the XLR output! The output impedance
is only 50 Ohms (unbalanced) when in the HI position and this is not enough to isolate the audio amplifier from a short to ground.
Distortion will result.
MONITOR
AUDIO
AMP
MUTE
RELAY
OUTPUT LEVEL ADJUST
AND RANGE SWITCH
511
50
511
50
LO
511
MID
HI
1k
LO
511
MID
HI
LEVEL
MONITOR
AMP
OUT
XLR
OUT
2 (Hi)
1 (Common or Ground)
3 (Lo)
UCR205D Simplified Audio Output Circuit
UCR205D REPLACEMENT PARTS and ACCESSORIES
Part No. Description
UHF Rubber Duck Antenna, straight connector
32251 Velcro mounting strips
35753 Zippered, padded vinyl system pouch
PS200 Power supply cable locking plug on one end and a
Hirose plug on the other for hookup to a camera.
21586 Power supply cable with locking plug on one end and pigtail leads on the other
Rio Rancho, NM – USA
9
TROUBLESHOOTING
POWER SUPPLY AND FUSE
LEDs not lit or dimly lit
• External power supply disconnected or inadequate.
• Main power supply fuse tripped. Turn the receiver
off, remove the cause of the overload and turn the
receiver back on.
• Wrong polarity power source. The external DC in
requires POSITIVE to be on the center pin.
PILOT TONE SQUELCH
The PILOT indicator lamp on the front panel glows green to
indicate that the audio has been turned on at the transmitter, and
that the audio output on the receiver is enabled. When the lamp
is on, the audio is enabled. When the lamp is off, the audio is
muted.
PILOT lamp on, but no sound
• Audio output cable bad or disconnected.
• Audio Output level set too low.
PILOT lamp does not come on when transmitter audio
switch is turned on
• It takes several seconds for the relay to actuate the
PILOT lamp. Turn the transmitter power and audio
switches on and wait 3 to 5 seconds for the lamp to
come on.
Normal audio on output but the Mod meter on the front
panel is not working.
• The Power switch may be in the “ON (Pilot Disable)”
position. This front panel switch should be in the
right-most position.
AUDIO SIGNAL QUALITY
Poor signal to noise ratio
• Transmitter gain set too low
• Noise may not be in wireless system. Mute the audio
signal at the transmitter and see if noise remains. If the
noise remains, then turn the power off at the transmitter
and see if it remains. If the noise is still present, then
the problem is not in the transmitter.
• If noise is still present when the transmitter is turned
off, try lowering the audio output level on the
UCR205D rear panel and see if the noise lowers
correspondingly. If the noise remains, the problem is
not in the receiver.
• Receiver output is too low for the input of the device
it is feeding. Try increasing the output level of the
UCR205D and lowering the input gain on the device
the UCR205D is feeding.
Distortion
• Transmitter input gain too high. Check and/or readjust input gain on transmitter according to the LEDs
on the transmitter and then verify the setting with the
transmitter audio level LED strip on the UCR205D
front panel.
• Audio output level too high for the device the
UCR205D is feeding. Lower the output level of the
UCR205D.
ANTENNAS AND RF SIGNAL STRENGTH
RF Level is weak.
• Antenna is disconnected or there is a bad connection
• Antenna may need to be moved or re-oriented
• Improper length of antenna, or wrong antenna. UHF
whip antennas are generally about 3 to 5 inches long.
UHF helical antennas may be shorter, but are often less
efficient.
10
UHF Wireless Diversity Receiver
2
0
SPECIFICATIONS AND FEATURES
Operating Frequencies:
Frequency Adjustment Range:
Receiver Type:
Frequency Stability:
Front end selectivity:
Sensitivity
20 dB Sinad:
60 dB Quieting:
Squelch quieting:
AM rejection:
Modulation acceptance:
Image and spurious rejection:
Third order intercept:
Diversity method:
FM Detector:
Antenna inputs:
Audio outputs
Rear Panel XLR:
Monitor:
Front Panel Controls and Indicators:
Rear Panel Controls and features:
Power Options:
Weight:
Dimensions:
537.600 to 865.000 MHz (537.600 to 767.900 US model)
25.5 MHz max
Dual conversion, superheterodyne, 71MHz and 455kHz
±0.002 %
>22 dB at ±4 MHz
0.8 uV (-109 dBm), A weighted
1.0 uV (-107 dBm), A weighted
Greater than 125 dB
Greater than 60 dB, 2 uV to 1 Volt (Undetectable after processing)
>90 kHz
>100 dB
+12 dBm
Phased antenna diversity
Digital Pulse Counting Detector operating at 455kHz
Dual BNC female; 50 Ohm impedance
Nominal 600 Ohm balanced, three level ranges:
LO - Variable -50 dBm to -20 dBm
MID - Variable -30 dBm to 0 dBm
HI - +7 dBm line level.
0.33VRMS, 50 Ohm load
Main and Diversity antenna BNC connectors; Power on/pilot disable/off switch and LED; Dual
function pilot tone LED; Dual function 10 segment display for RF signal level and transmitter audio
level display; Two LEDs (0 / 180) to indicate the antenna phase.
XLR audio output jack; Monitor output jack and level control; Frequency selection switches;
External DC input; Audio level range select switch.
Minimum 10 Volts to maximum 16.5 Volts DC; 3.1 W, 260 mA at 12VDC
12 ozs
3.2" wide x 1.22" high x 5.1" deep
Typical System Frequency Response
+6
+3
0dB
-3
-6
-9
-12
30 100 1kHz 10k 20k
Adjustable LF Roll-off
.0%
1.0%
.5%
0%
Typical System THD + Noise
30 100 1kHz 10k 20k
Specifications subject to change without notice.
Rio Rancho, NM – USA
11
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 TROUBLE SHOOTING 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’ service department is equipped and staffed to quickly repair your equipment. In warranty repairs are made at no
charge in accordance with the terms of the warranty. Out of warranty repairs are charged at a modest flat rate plus parts and
shipping. Since it takes almost as much time and effort to determine what is wrong as it does to make the repair, there is a charge
for an exact quotation. We will be happy to quote approximate charges by phone for out of warranty repairs.
RETURNING UNITS FOR REPAIR
You will save yourself time and trouble if you will follow the steps below:
A. DO NOT return equipment to the factory for repair without first contacting us by letter or by phone. We need to know the nature
of the problem, the model number and the serial number of the equipment. We also need a phone number where you can be reached
8 am to 4 pm (Mountain Standard Time).
B. After receiving your request, we will issue you a return authorization number (R.A.). This number will help speed your repair
through our receiving and repair departments. The return authorization number must be clearly shown on the outside of the
shipping container.
C. Pack the equipment carefully and ship to us, shipping costs prepaid. If necessary, we can provide you with the proper packing
materials. UPS is usually the best way to ship the units. Heavy units should be “double-boxed” for safe transport.
D. We also strongly recommend that you insure the equipment, since we cannot be responsible for loss of or damage to equipment
that you ship. Of course, we insure the equipment when we ship it back to you.
Mailing address: Shipping address: Telephones:
Lectrosonics, Inc. Lectrosonics, Inc. Regular: (505) 892-4501
PO Box 15900 581 Laser Rd. Toll Free (800) 821-1121
Rio Rancho, NM 87174 Rio Rancho, NM 87124 FAX: (505) 892-6243
USA USA
Web : http://www.lectrosonics.com Email: sales@lectrosonics.com
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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.
LECTROSONICS, INC.
581 LASER ROAD
RIO RANCHO, NM 87124 USA
www.lectrosonics.com
February 4, 2002
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