Lectrosonics UH400 Wireless Microphone Transmitter User Manual uh400man pmd
Lectrosonics Inc Wireless Microphone Transmitter uh400man pmd
users manual
UH400
FREQUENCY-AGILE
PLUG-ON UHF TRANSMITTER
LECTROSONICS, INC.
Rio Rancho, NM
www.lectrosonics.com
OPERATING INSTRUCTIONS
and trouble-shooting guide
2
UH400
LECTROSONICS, INC.
INTRODUCTION
Thank you for selecting the Lectrosonics UH400 frequency agile, plug-on transmitter. The
UH400 combines over 80 years of engineering experience with the very latest components, in a
design that addresses the most demanding professional applications.
The design of the UH400 was the direct result of numerous conversations with users, staging and
touring companies and dealers across the US. The specific concerns and needs brought up in
these conversations led directly to the development of the operational features offered on the
UH400. Two hundred fifty six frequencies are user selectable in 100kHz steps to alleviate
interference problems in travelling venues.
The UH400 is a rugged, machined aluminum package. Selectable voltage phantom power is
provided on pins 2 and 3. Level indicating LEDs are provided to make level settings quick and
accurate, without having to view the receiver. The battery compartment accepts any 9 Volt
alkaline or lithium battery and makes a positive connection via self-adjusting contacts.
Only the UH400 transmitter is covered in this manual. Companion receivers are covered in
separate manuals. The UH400 will operate with any 100, 200 or 400 Series Lectrosonics
receiver in the same frequency group.
The UH400 transmitter is FCC type accepted under Part 74: 470 - 608MHz and 614 - 806MHz
TABLE OF CONTENTS
INTRODUCTION ..................................................................................................... 2
GENERAL TECHNICAL DESCRIPTION ...............................................................3
CONTROLS AND FUNCTIONS .............................................................................4
OPERATING INSTRUCTIONS ............................................................................... 6
TROUBLESHOOTING ............................................................................................ 8
SPECIFICATIONS AND FEATURES .................................................................. 10
SERVICE AND REPAIR ...................................................................................... 11
RETURNING UNITS FOR REPAIR ..................................................................... 11
WARRANTY ........................................................................................... Back cover
3
Frequency Agile Plug-on UHF Transmitter
Rio Rancho, NM – USA
GENERAL TECHNICAL DESCRIPTION
GENERAL
The 400 system uses 75kHz wide deviation for an extremely high
signal to noise ratio. The switching power supplies provide con-
stant voltages to the transmitter circuits from the beginning (9.3
Volts) to the end (5.5 Volts) of battery life. The input amplifier
uses an ultra low noise op amp for quiet operation. It is gain
controlled with a wide range dual envelope input compressor
which cleanly limits input signal peaks over 30dB above full
modulation.
DIGITAL HYBRID TECHNOLOGY
All wireless links suffer from channel noise to some degree, and
all wireless microphone systems seek to minimize the impact of
that noise on the desired signal. Conventional analog systems
use compandors for enhanced dynamic range, at the cost of
subtle artifacts (known as “pumping” and “breathing”). Wholly
digital systems defeat the noise by sending the audio information
in digital form, at the cost of some combination of power, band-
width and resistance to interference.
The Lectrosonics Digital Hybrid system overcomes channel noise
in a dramatically new way, digitally encoding the audio in the
transmitter and decoding it in the receiver, yet still sending the
encoded information via an analog FM wireless link. This propri-
etary algorithm is not a digital implementation of an analog
UH400 Block Diagram
compandor but a technique which can be accomplished only in
the digital domain, even though the inputs and outputs are ana-
log signals. (As of this writing, the patent is still pending, so we
cannot reveal detailed information about the algorithm at this
time.)
Channel noise still has an impact on received signal quality and
will eventually overwhelm the receiver. The Digital Hybrid simply
encodes the signal to use a noisy channel as efficiently and
robustly as possible, yielding audio performance that rivals that
of wholly digital systems, without the power and bandwidth prob-
lems inherent in digital transmission. As always, these
advantages come at a cost. The Digital Hybrid system requires
fairly intensive digital processing in both the transmitter and the
receiver. These processors cost money, take up space and
consume power. The Digital Hybrid system also requires that the
underlying RF link be of excellent quality, with better frequency
response and distortion characteristics than that required by
conventional systems.
Because it uses an analog FM link, the Digital Hybrid enjoys all
the benefits of conventional FM wireless systems, such as excel-
lent range, efficient use of RF spectrum, and long battery life.
However, unlike conventional FM systems, the Digital Hybrid has
done away with the analog compandor and its artifacts.
Transmitter
Phase Locked Loop
Voltage
Controlled
Oscillator
Freq
Switches
11001001
A-D
Converter
Digital Signal Processor
11001001
D-A
Converter
Shunt
Limiter
Bicolor
Modulation
LEDs
Microprocessor
9V
Switching
Power
Supply
+3.3v
+3.2v
+1.8v
+6v
-3v
50
Isolator
Hi/Lo
Pass
Filter
Audio
Encoded
Audio +
Pilot Tone
11.3 MHz
Reference
Bicolor
Power
LED
Audio
Level
Input
Amp
INPUT
JACK
+5V / +15V / +48V
BIAS SUPPLY
<-- (See Input Jack under Controls and Functions for details.)
4
UH400
LECTROSONICS, INC.
NO PRE-EMPHASIS/DE-EMPHASIS
The signal to noise ratio of the 400 system is high enough to
preclude the need for conventional pre-emphasis (HF boost) in
the transmitter and de-emphasis (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.
Pre-emphasis can also cause distortion in the receiver. As this
signal is passed through the IF filters in the receiver, distortion
can be produced, most noticeably at full modulation. De-empha-
sis cannot be applied until the signal is converted into audio, so
there is no way around this problem short of eliminating pre-
emphasis altogether. Neither of these problems occur in the 400
system
PILOT TONE SQUELCH
The 400 system utilizes one of 256 different ultrasonic tones
between 25 and 32 kHz, that modulate the carrier to operate the
receiver squelch. The pilot tone frequency is chosen according
to which of the 256 channels has been selected by the frequency
switch setting. The basic benefit of the pilot tone squelch system
is that the receiver will remain muted until it receives the pilot
tone from the matching transmitter, even if a strong RF signal is
present on the carrier frequency of the system. The UM400
extends this concept even further by insuring that all transmitters
in a system have different pilot tone frequencies so that even
spurious RF from the wrong transmitters can’t open the receiver
squelch.
WIDE-BAND DEVIATION
±75kHz deviation improves the capture ratio, signal to noise ratio
and AM rejection of a wireless system dramatically, compared to
the more commonly used ±15kHz deviation.
LONG BATTERY LIFE
Switching power supplies throughout the design allow over 4.5
hours of operation using a single 9 Volt alkaline battery. (A 9V
lithium battery will provide over 12 hours of operation.) The
battery contacts are spring loaded to prevent “rattle” as the unit is
handled.
FREQUENCY AGILITY
The transmitter section uses a synthesized, frequency selectable
main oscillator. The frequency is extremely stable over a wide
temperature range and over time.
Two rotary switches, located on the side panel of the unit, provide
256 frequencies in 100kHz steps over a 25.5MHz range. This
alleviates carrier interference problems in mobile or traveling
applications.
Top View Control Panel
–10
–20
POWER
ON/OFF
LED
PW R O FF
LEVEL
P HTM
N O P HTM 5V
1 5V
48 V
MIC LEVEL
PHANTOM POWER
VOLTAGE SELECT
POWER
SWITCH
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
FREQUENCY
1.6MHz 100kHz
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
Side View
FREQUENCY SWITCHES
(BEHIND DOOR)
INPUT
JACK
INPUT
JACK
MODULATION LEDs
CONTROLS AND FUNCTIONS
The UH400 may be used with a wide variety of microphones.
The 3-pin XLR connector on the UH400 allows the transmitter to
be used with any dynamic microphone, as well as many two wire
positive bias lavaliere systems (such as those systems supplied
by Lectrosonics).
POWER SWITCH
Turns the battery power on and off. Even when the switch is
turned off or on abruptly, the pilot tone muting system prevents
“thumps” or transients from occurring.
The PHTM (center) position of the power switch turns on the
phantom power while the NO PHTM (fully on) position disables
phantom power. Be careful to use the center position phantom
power only when necessary and keep the voltage selector switch
in the 5 Volt position for additional protection against accidents.
POWER ON/OFF LED
This LED glows green when the battery is good. When the lamp
glows red, there is about 30 minutes of operation left with the
recommended lithium battery, and about 20 minutes of life left
with an alkalline battery. The lamp will flash red when there are
only a few minutes of life remaining. A NiMh battery will give little
or no warning when it is depleted. If you wish to use NiMh
batteries in the UM400, we recommend trying fully charged
batteries in the unit, noting the length of time that the batteries
will run the unit and in the future use somewhat less than that
time to determine when the battery needs to be replaced. A
weak battery will sometimes light the POWER LED to the “good”
5
Frequency Agile Plug-on UHF Transmitter
Rio Rancho, NM – USA
green indication immediately after being put in the unit, but will
soon discharge to the point where the LED will go red or shut
down, just like a flashlight with “dead” batteries. If the lamp fails
to light, the battery should be replaced.
PHANTOM POWER VOLTAGE SELECT SWITCH
This switch selects from three voltages when the PWR switch is
in the mid position. The voltages are:
•5 Volts for lavaliere microphones,
•15 Volts for some professional mics requiring high current and
for many common stage mics that will operate over a wide
phantom voltage range of 12 to 48 Volts. With the proper
adapter, this position can also be used with T power micro-
phones. See our web site for details on finding or making the
proper adapter.
•42 Volts for microphones that do in fact require a supply
greater than 15 Volts. (See below for a discussion of why 42
and not a “true” 48 Volts.)
For longest battery life use the minimum phantom voltage neces-
sary for the microphone. Many stage microphones regulate the
48 Volts down to 10 Volts or so internally anyway, so you might
as well use the 15 Volt setting and save some battery power. If
you are not using a microphone for the input device, turn the
phantom power off (off is the fully up position of the power
switch). The phantom power should only be used with a fully
floating, balanced device such as almost any type microphone
with a 3 pin XLR connector. If you use the phantom power with an
unbalanced device or if pins 2 or 3 are DC connected to ground,
then you will draw maximum current from the power supply. The
UH400 is fully protected against such shorts but the 9 Volt battery
will be drained at twice its normal rate.
The transmitter can supply 4 mA at 42 Volts, 8 mA at 15 Volts,
and 8 mA at 5 Volts. The 42 Volts setting actually supplies the
same voltage to a 48 Volt microphone as the DIN standard
arrangement due to a dynamic biasing scheme that does not
have as much voltage drop as the DIN standard. The 48 Volt DIN
standard arrangement protects against shorts and high fault
current with high resistance in the power supply feeds to pins 2
and 3. This protects the supply if the supply current is acciden-
tally shorted to ground and also keeps the microphone from
being attenuated by the power supply. The UH400 improves on
those functions and is able to use less power from the battery by
using constant current sources and current limiters. With this
dynamic arrangement the UH400 can also supply more than
twice the current of competing 48 Volt plug on units and provide
4 times the current to some very high end 15 Volt microphones.
The 5 Volt setting is provided for lavaliere microphones made by
us and others. Do not power lavalieres from the 15 or 48 Volt
setting as the microphone will be most likely destroyed. Lec-
trosonics makes an adapter, MCA5X, that will adapt our standard
TA5F 5 pin microphones to the UH400. This adapter also pro-
vides protection against excessive phantom voltage. If voltages
higher than 5 Volts are applied to the adapter, a Zener will shunt
excess voltage to ground. The microphone won't work until the
voltage is correctly reduced to 5 Volts. If you have an older
1
2
3
+5V / +15V / +42V
4.7uf
1uh
1uh
1uh
To Mic
Preamp
1000
I
lavaliere mic that was wired directly to an XLR for use with the
earlier UH200's, we strongly recommend building our protection
circuit into the XLR to prevent accidental destruction of the
lavaliere.
FREQUENCY ADJUST
These two rotary switches adjust the center frequency of the
carrier. The 1.6M is a coarse adjustment and the 100K is the fine
adjustment. Each transmitter is factory aligned at the center of
its operating range. The default position of the frequency select
switches is in the center of the transmitter’s range.
INPUT JACK
Standard 3-pin Switchcraft XLR type. Pin 2 is signal, pin 3 is a
floating signal ground, and pin 1 is case ground (see schematic
below). The UH400 is self-locking onto a standard microphone.
If severe noise is experienced when the microphone is moved
with respect to the UH400, the cause is an unbalanced con-
dition between pins 2 and 3 of the microphone.
MODULATION LEDS
Indicate the proper setting of the MIC LEVEL control. There are
two bicolor modulation LEDs that can light either red or green.
“-20dB level” One modulation LED glows green and the
transmitter is 20 dB below full modulation.
“-10 dB level” Both modulation LEDs glow green and the
transmitter is close to full modulation.
“+0 dB level” The -20 LED glows red and the -10 LED
glows green. The transmitter is in slight
limiting and is fully modulated. This is
probably desirable. See the discussion below
under Input Limiter.
“+10 dB level” Both LEDs are red. The transmitter is in
limiting and you may want to reduce the
transmitter audio gain. See the discussion
below under Input Limiter.
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
Frequency select switches, default position (8,8)
Input
Jack
Schematic
6
UH400
LECTROSONICS, INC.
TO ATTACH
TO REMOVE
Pull on mic to insure locking.
Press firmly, listen for click.
Depress collar fully.
Hold the
transmitter
case and
rotate the
collar in the
direction
shown. Do
this over a
soft surface
as the
microphone
may pop off
suddenly
Click!
INPUT LIMITER
The 400 series transmitters employ a digitally-controlled analog
audio limiter just before the analog-to-digital converter. The
limiter has a range of more than 30dB for excellent overload
protection. A dual release envelope makes the limiter acousti-
cally transparent while maintaining low distortion. It can be
thought of as two limiters in series, connected as a fast attack
and release limiter followed by a slow attack and release limiter.
The limiter recovers quickly from brief transients, so that its
action is hidden from the listener, but recovers slowly from sus-
tained high levels, to both keep audio distortion low and preserve
short term dynamic changes.
The audio level LEDs indicate limiter activity. The first red LED
indicates that the limiter is active and that the transmitter is fully
modulated (audio level is between +0 and +10 dB). The second
red LED indicates that the level is 10dB or more into limiting.
Occasional forays into the red are desirable for most applica-
tions, since the distortion introduced by the limiter is so minimal,
and full modulation is thus assured. We strongly recommend
setting the gain of the transmitter high enough so that the first red
LED occasionally lights.
Attaching the Microphone
Generally speaking, some limiting is desirable in normal opera-
tion to improve the signal to noise ratio of the system. The
limiting action is not audible and does not create distortion. A
highly trained ear would hear only the compression of the peaks
in the audio signal, which is desirable with most recorders and
many sound reinforcement systems.
OPERATING MODE INDICATORS
The modulation LEDS will blink at power up to indicate the
selected operating mode. Immediately after powering up, all
LEDS will blink together red, then green, followed by the audio
level LEDs (-20 and -10) blinking to indicate the mode.
The –20 and –10 LEDs will blink:
• Once for 100 mode
• Two times for 200 mode
• Three times for mode 3
• Four times for 400 mode
MIC LEVEL
Used to adjust the audio input level for the proper modulation.
1. Insert the UH400 into the selected microphone. Listen for the
“click” that indicates the transmitter has locked on to the
microphone. Pull on the mic to insure proper locking has
occurred.
2. Turn the power switch on and, if necessary, enable phantom
power and select the proper voltage for your microphone.
3. Hold the microphone as you will when you will be using it.
4. Position the microphone in the location you will use in actual
operation.
5. While speaking or singing at the same voice level that will
actually be used, observe the MODULATION LEDs. Adjust
the MIC LEVEL control knob until the LEDs begin to light. At
too low a setting neither LED will light as you speak. Gradually,
turn the gain up until the –20 dB LED lights green and then the
-10 dB lights green. We strongly recommend setting the gain
of the transmitter even higher so that the first red LED
occasionally lights.
6. Once the gain has been adjusted, the audio system audio can
be turned on to make level adjustments in the main audio
system.
OPERATING INSTRUCTIONS
7
Frequency Agile Plug-on UHF Transmitter
Rio Rancho, NM – USA
OPERATING TIPS
The MIC LEVEL control knob should not be used to control the
volume of your sound system or recorder levels. This gain
adjustment matches the transmitter gain with the user’s voice
level and microphone positioning.
If the audio level is too high — both red LEDs will light frequently
or stay lit. This condition may reduce the dynamic range of the
audio signal.
If the audio level is too low — neither LED will light, or only the
–20 LED will light green. This condition may cause hiss and
noise in the audio.
Different voices will usually require different settings of the MIC
LEVEL control, so check this adjustment as each new person
uses the system. If several different people will be using the
transmitter and there is not time to make the adjustment for each
individual, adjust it for the loudest voice.
ADJUSTING THE TRANSMITTER FREQUENCY
If you are experiencing interference from another signal on your
frequency, you may want to change the operating frequency of
your system. The left switch changes the operating frequency by
1.6 MHz per step and the right switch changes it 100 kHz per
step. If you are experiencing interference, change the operating
frequency in 100 kHz steps to find a clear channel. If it is not
possible to find a clear channel using the 100 kHz switch, return it
to its original position and change the 1.6 MHz switch by one click
then try the 100 kHz switch again.
To gain access to these switches, slide the access door open
with a fingernail.
SELECTING THE OPERATING MODE
This unit is capable of working with Lectrosonics 100 series
analog , 200 series analog, 400 series digital hybrid or some
other analog wireless receivers (contact the factory for details).
The transmitter must be set to the operating mode of the match-
ing receiver, which is easily done using only the supplied
screwdriver and a battery.
NOTE: the UH400 is supplied from the factory as a
400 series transmitter
1. Make certain a good battery is in the battery compartment. If
the PWR LED lights up, the battery is correctly loaded.
2. Turn off the transmitter.
3. With a small screwdriver (included with your unit), set the
frequency change switches to CC. (for Change, Change).
4. Power up the unit briefly – just a couple of seconds (just watch
for the LED’s to light up) then immediately turn it off.
5. Change the switches to one of the following settings:
MODE SWITCH SETTINGS
100 Series 1,1
200 Series 2,2
Mode 3* 3,3 (*Contact factory for details.)
400 Series Digital Hybrid 4,4
6. Turn the transmitter on, wait just a couple of seconds and turn
off again.
7. Change the switches to 0,0.
8. Power up the unit. You have now changed the operation mode
for the UH400.
At power up the UH400 will confirm the current operating mode
with the number of blinks listed above. The setting will remain
the same until you reset it with the procedure listed above. You
do not have to change it with every use.
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
Frequency select switches, default position (8,8)
8
UH400
LECTROSONICS, INC.
BATTERY REPLACEMENT
The UH400 transmitter is powered by a standard alkaline 9 Volt
battery. It is important that you use ONLY ALKALINE OR
LITHIUM batteries for longest life. Standard zinc-carbon batter-
ies marked “heavy duty” or “long-lasting” are not adequate. They
will provide only about 5 minutes of operation. Similarly, ni-cad
rechargeable batteries only give 1 hour of operation, and will also
run down quite abruptly. Alkaline batteries provide about 4.5
hours of operation while lithium batteries will run the unit for
about 12 hours.
To open the battery compartment, press outward on the cover
door in the direction of the arrow as shown in the drawing. Only
slight, sliding pressure is needed to open and close the battery
door.
Swing the door open and take note of the polarity marked inside
showing the location of the positive (+) and negative (-) terminals.
Insert the battery and close the cover by pressing in and across,
reversing the opening procedure outlined above. Note that the
battery door will NOT close if the battery is inserted incorrectly,
since the terminals will hit a protective polarity barrier.
Battery Compartment Action
SWING OPEN
RELEASE
DOOR
OBSERVE
POLARITY
Don’t force the battery door closed. If it is difficult to close, the
battery is in backwards.
The battery life will be affected by the amount of phantom power
supplied to any microphones that require it. A high drain 48 Volt
microphone can shorten battery life by 40% or more. A light drain
15 Volt microphone will make little or no difference in battery life.
The only way to be sure is to test the transmitter and microphone
combination with a brand new battery; then and only then will you
be sure of the combination's battery life.
CAUTION
Lithium batteries will expand and swell if allowed to go into a
deep discharge. Be sure to remove lithium batteries as soon as
the battery is depleted. If lithium batteries are allowed to fully
discharge while still inside the battery compartment, they will be
very difficult to remove.
Stuck lithium batteries can be avoided by removing the label
wrapping around the battery before use. This will allow the
battery to swell but will still leave enough room in the compart-
ment for the battery to fall out normally.
TROUBLESHOOTING
Before going through the following chart, be sure that you have a good battery in the transmitter. It is important that you follow these
steps in the sequence listed.
SYMPTOM POSSIBLE CAUSE
TRANSMITTER BATTERY LED OFF 1. Battery is inserted backwards.
2. Battery is dead.
NO TRANSMITTER MODULATION LEDs 1. Gain control turned all the way down.
2. Battery is in backwards. Check power LED.
3. Mic capsule is damaged or malfunctioning.
4. Mic cable damaged or mis-wired.
5. Phantom power not enabled for mic that requires it.
9
Frequency Agile Plug-on UHF Transmitter
Rio Rancho, NM – USA
SYMPTOM POSSIBLE CAUSE
RECEIVER RF LAMP OFF 1. Transmitter not turned on.
2. Transmitter battery is dead.
3. Receiver antenna missing or improperly positioned.
4. Transmitter and receiver not on same frequency. Check switches/
display on transmitter and receiver.
5. Operating range is too great.
NO SOUND (OR LOW SOUND LEVEL),
RECEIVER MOD LEVEL LEDs ARE ON 1. Receiver output level set too low.
2. Receiver output is disconnected; cable is defective or mis-wired.
3. Sound system input is turned down.
NO SOUND (OR LOW SOUND LEVEL),
RECEIVER MOD LEDs ARE OFF 1. Transmitter gain (audio level) set too low.
2. Faulty microphone
3. Phantom power not enabled for mic that requires it.
DISTORTED SOUND 1. Transmitter gain (audio level) is far too high. Check mod level
lamps on transmitter and receiver as it is being used. (Refer to
the Operating Instructions section for details on gain adjustment)
2. Receiver output may be mismatched with the sound system or
recorder input. Adjust output level on receiver to the correct level
for the recorder, mixer or sound system.
3. Excessive wind noise or breath “pops.” Reposition microphone
and/or use a larger windscreen.
4. Transmitter is not set to same frequency as receiver. Check that
frequency select switches on receiver and transmitter match.
HISS AND NOISE – AUDIBLE DROPOUTS 1. Transmitter gain (audio level) far too low.
2. Receiver antenna missing or obstructed.
3. Operating range too great.
EXCESSIVE FEEDBACK 1. Transmitter gain (audio level) too high causing the limiter to reduce
the dynamic range which in turn causes feedback. Check gain
adjustment and/or reduce receiver output level. (Refer to the
Operating Instructions section for details on gain adjustment)
2. Transmitter too close to speaker system.
3. Mic is too far from user’s mouth.
10
UH400
LECTROSONICS, INC.
SPECIFICATIONS AND FEATURES
Operating frequencies: 537.600 to 607.900 MHz; 614.100 to 793.500 MHz
Frequency selection: 256 frequencies in 100kHz steps
RF Power output: 100 mW (nominal)
Pilot tone: 25 to 32 kHz; 5kHz deviation (in 400 Series mode)
Frequency stability: ± 0.002%
Deviation: ± 75 kHz max. (in 400 Series mode)
Spurious radiation: 60 dB below carrier
Equivalent input noise: –118 dBV, A-weighted
Input level: Nominal 2 mV to 300 mV, before limiting; Greater than 1.0 V maximum, with limiting.
Input impedance: 1k Ohm
Input limiter: Soft limiter, >30 dB range
Gain control range: 43 dB; semi-log rotary control
Modulation indicators: Dual bicolor LEDs indicate modulation of –20, -10, 0, +10 dB referenced to
full modulation.
Low frequency roll-off: –12dB/octave; 70 Hz
Controls: Control panel knob adjusts audio gain.
Rotary switches on bottom panel adjust transmitter frequency.
Audio Frequency Response: 70 Hz to 20 kHz, +/-1dB (The audio is deliberately rolled off at 70Hz using a
12dB/octave filter. This filter cannot be disabled.)
Signal to Noise Ratio (dB): SmartNR No Limiting With Limiting
(overall system, 400 Series mode) Off 103.5 108.0
Normal 107.0 111.5
Full 108.5 113.0
Note: The dual envelope “soft” limiter provides exceptionally good handling of
transients using variable attack and release time constants. The gradual onset of
limiting in the design begins below full modulation, which reduces the measured
figure for SNR without limiting by 4.5 dB.
Total Harmonic Distortion: 0.2% typical (400 Series mode)
Antenna: Built in
Battery Type: 9V Alkaline or Lithium
Battery Life: 4.5 Hours with alkaline 9 Volt, 12 hrs with lithium (Battery life will vary with battery
brand, phantom power voltage setting and mic current drain.)
Weight: 6.5 ozs. with lithium battery, no mic
Overall Dimensions: 1.5 x 1.5 x 4.2 inches (Not including microphone.)
Emission Designator: 180KF3E
Specifications subject to change without notice.
The FCC requires that the following statement be included in this manual:
This device complies with FCC radiation exposure limits as set forth for an uncontrolled
environment. This device should be installed and operated so that its antenna(s) are
not co-located or operating in conjunction with any other antenna or transmitter.
11
Frequency Agile Plug-on UHF Transmitter
Rio Rancho, NM – USA
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 malfunction-
ing 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
World Wide Web: http://www.lectrosonics.com Email: sales@lectrosonics.com
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
May 1, 2003
LIMITED ONE YEAR WARRANTY