LECTROSONICS LELRB1 LR Compact Wireless Receiver Instruction Manual

LELRB1 LR Compact Wireless Receiver

LR
Compact Wireless Receiver

INSTRUCTION MANUAL

Fill in for your records: Serial Number: Purchase Date:

Digital Hybrid Wireless®
US Patent 7,225,135
Quick Start Summary

1. Install receiver batteries (p.8). 2) Select frequency step size in the receiver (p.12). 3) Select the compatibility mode in the receiver (p.12). 4) Find a clear operating frequency (p.12,13). 5) Set up transmitter to match receiver (p.14). 6) Adjust transmitter input gain (p.14). 7) Adjust receiver audio output level for the connected
   device (p.15).
   Rio Rancho, NM, USA www.lectrosonics.com

LR

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LECTROSONICS, INC.

Compact Portable Receiver
Table of Contents
Introduction………………………………………………………………………………………………………………………………………………………………………4 Three Block Tuning Range …………………………………………………………………………………………………………………………………………….4 RF Front-End with Tracking Filter ……………………………………………………………………………………………………………………………………4 IF Amplifiers and SAW Filters…………………………………………………………………………………………………………………………………………4 Digital Pulse Counting Detector ……………………………………………………………………………………………………………………………………..4 DSP- Based Pilot Tone …………………………………………………………………………………………………………………………………………………..4 SmartSquelch 5 TM…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………….. SmartDiversity 5 TM …………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………… Turn On and Turn Off Delays ………………………………………………………………………………………………………………………………………….5 Test Tone …………………………………………………………………………………………………………………………………………………………………….5 LCD Display ………………………………………………………………………………………………………………………………………………………………..5 Smart Noise Reduction (SmartNRTM)……………………………………………………………………………………………………………………………….5
Panels and Features………………………………………………………………………………………………………………………………………………………….6 IR (infrared) Port…………………………………………………………………………………………………………………………………………………………..6 Balanced Audio Output …………………………………………………………………………………………………………………………………………………6 Antenna Inputs …………………………………………………………………………………………………………………………………………………………….6 Battery Compartment ……………………………………………………………………………………………………………………………………………………6 USB Port …………………………………………………………………………………………………………………………………………………………………….6 Keypad and LCD Interface …………………………………………………………………………………………………………………………………………….7 Battery Status and RF Link LED Indicators………………………………………………………………………………………………………………………7
Installing Batteries ……………………………………………………………………………………………………………………………………………………………8 LCD Main Window………………………………………………………………………………………………………………………………………………………..8
Navigating the Menus ……………………………………………………………………………………………………………………………………………………….9 About Frequency Blocks …………………………………………………………………………………………………………………………………………………..9 LCD Menu Tree………………………………………………………………………………………………………………………………………………………………..10 Menu Item Descriptions …………………………………………………………………………………………………………………………………………………..11 The Power Menu ……………………………………………………………………………………………………………………………………………………………..12 System Setup Procedures ……………………………………………………………………………………………………………………………………………….12 Tuning Groups ………………………………………………………………………………………………………………………………………………………………..15 Antenna Orientation ………………………………………………………………………………………………………………………………………………………..16 Accessories ……………………………………………………………………………………………………………………………………………………………………17 Firmware Update …………………………………………………………………………………………………………………………………………………………….18 Specifications …………………………………………………………………………………………………………………………………………………………………20 Service and Repair ………………………………………………………………………………………………………………………………………………………….21
Returning Units for Repair……………………………………………………………………………………………………………………………………………21

FCC Notice
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. The equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
· Reorient or relocate the receiving antenna
· Increase the separation between the equipment and receiver
· Connect the equipment into an outlet on a circuit different from that which the receiver is connected
· Consult the dealer or an experienced radio/TV technician for help
Changes or modifications to this equipment not expressly approved by Lectrosonics, Inc. could void the user’s authority to operate it.

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Introduction
Three Block Tuning Range
The LR receiver tunes across a range of over 76 MHz. This tuning range covers three standard Lectrosonics frequency blocks. See page 9 for more information.
TUNING RANGE

BLOCK

BLOCK

BLOCK

Three tuning ranges are available covering standard blocks as follows:

Band Blocks Covered Freq. (MHz)

A1

470, 19, 20

470.1 – 537.5

B1

21, 22 23

537.6 – 614.3

C1

24, 25, 26

614.4 – 691.1

To simplify backward compatibility with earlier Digital Hybrid Wireless® equipment, block numbers are presented along with frequencies in LCD screens.

RF Front-End with Tracking Filter
A wide tuning range is helpful in finding clear frequencies for operation, however, it also allows a greater range of interfering frequencies to enter the receiver. The UHF frequency band, where almost all wireless microphone systems operate, is heavily populated by high power TV transmissions. The TV signals are immensely more powerful than a wireless microphone transmitter signal and will enter the receiver even when they are on significantly different frequencies than the wireless system. This powerful energy appears as noise to the receiver, and has the same effect as the noise that occurs with extreme operating range of the wireless system (noise bursts and dropouts). To alleviate this interference, front-end filters are needed in the receiver to suppress RF energy below and above the operating frequency.
The LR receiver employs a variable frequency, tracking filter in the front-end section (the first circuit stage following the antenna). As the operating frequency is changed, the filters re-tune to stay centered over the selected carrier frequency.

BLOCK

BLOCK

BLOCK

IF Amplifiers and SAW Filters
The first IF stage employs two SAW (surface acoustic wave) filters. The use of two filters significantly increases the depth of filtering while preserving sharp skirts, constant group delay, and wide bandwidth. Though expensive, this special type of filter allows primary filtering as early as possible, at as high a frequency as possible, before high gain is applied, to deliver maximum image rejection. Since these filters are made of quartz, they are very temperature stable.
The signal is converted to 243.950 MHz in the first mixer stage, then passed through two SAW filters. After the SAW filter, the IF signal is converted to 250 kHz and then the majority of the gain is applied. Although these IF frequencies are unconventional in a wide deviation (±75 kHz) system, the design provides excellent image rejection.
Digital Pulse Counting Detector
Following the IF section, the receiver uses an elegantly simple, yet highly effective digital pulse counting detector to demodulate the FM signal to generate the audio, rather than a conventional quadrature detector. This unusual design eliminates thermal drift, improves AM rejection, and provides very low audio distortion. The output of the detector is fed to the microprocessor where a window detector is employed as part of the squelch system.
DSP-Based Pilot Tone
The Digital Hybrid system design uses a DSP generated ultrasonic pilot tone to reliably mute the audio when no RF carrier is present. The pilot tone must be present in conjunction with a usable RF signal before the audio output will be enabled. 256 pilot tone frequencies are used across each 25.6 MHz block within the tuning range of the system. This alleviates erroneous squelch activity in multichannel systems where a pilot tone signal can appear in the wrong receiver via IM (intermodulation).
Pilot tones are also provided for legacy equipment and some models from other manufacturers.
Note: This description applies only to the Digital Hybrid mode. In Lectrosonics 200 Series, IFB and Mode 6 compatibility, only one pilot tone frequency is used on all frequencies, emulating the original crystal-based system. In other compatibility modes, no pilot tone is used.

In the front-end circuitry, a tuned filter is followed by an amplifier and then another filter to provide the selectivity needed to suppress interference, yet provide a wide tuning range and retain the sensitivity needed for extended operating range.

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LECTROSONICS, INC.

Compact Portable Receiver

SmartSquelchTM
A DSP-based algorithm named SmartSquelchTM optimizes the receiver performance in very weak signal conditions. The RF level and supersonic noise in the audio are continuously monitored to determine the appropriate noise reduction needed and the point at which squelch (complete muting of the audio) is necessary.
As the RF level decreases and supersonic noise in the signal begins to increase, a variable knee, high frequency roll-off filter is applied to suppress high frequency noise. The filtering action moves in and out smoothly to avoid abrupt changes that could be audible. When the RF signal becomes so weak that the receiver can no longer deliver usable audio, the squelch will activate.
SmartDiversityTM
Microprocessor controlled antenna phase combining is used for diversity reception. The firmware analyzes RF level, the rate of change of RF level and the audio content to determine the optimum timing for phase switching and the optimum antenna phase. The system also employs “opportunistic switching” to analyze and then latch the phase in the best position during brief squelch activity.
Turn On and Turn Off Delays
A brief delay is applied when the receiver is powered up or down to prevent audible noise such as a thump, pop, click or other transient noise.
Test Tone
To assist in matching the audio levels of equipment connected to the receiver, a 1 kHz audio test tone generator is provided, with an output level adjustable from -50 to +5 dBu in 1 dB increments.
The tone simulates the audio output with a steady signal at full modulation, making it easy to adjust the level to precisely match the optimal level for the connected device and maximize the signal to noise ratio of the system.
LCD Display
Setup and monitoring is done through the LCD display on the control panel. The LCD image can be inverted as desired for personal preference or maximum visibility in direct sunlight. The built-in backlight for viewing in dimly lit environments can be set to remain on for 30 seconds, 5 minutes or to remain on constantly.

Smart Noise Reduction (SmartNRTM)
Note: The SmartNR setting is user selectable only in the Digital Hybrid compatibility mode. In other modes, noise reduction is applied in such a way as to emulate the original analog system as accurately as possible and is not user adjustable.
The wide dynamic range of digital hybrid technology, combined with flat response to 20 kHz, makes it possible to hear the -120 dBV noise floor in the mic preamp, or the (usually) greater noise from the microphone itself. To put this in perspective, the noise generated by the recommended 4k bias resistor of many electret lavaliere mics is ­119 dBV and the noise level of the microphone’s electronics is even higher. In order to reduce this noise the receiver is equipped with a “smart” noise reduction algorithm called SmartNR®, which removes hiss without sacrificing audio high frequency response.
SmartNR® works by attenuating only those portions of the audio signal that fit a statistical profile for randomness or “electronic hiss.” Because it is much more than a sophisticated variable low pass filter, the transparency of the audio signal is preserved. Desired high frequency signals having some coherence are not affected, such as speech sibilance and tones.
The Smart Noise Reduction algorithm has three modes, selectable from a user setup screen. The optimal setting for each application is subjective and is normally selected while simply listening.
· OFF defeats noise reduction and complete transparency is preserved. All signals presented to the transmitter’s analog front end, including any faint microphone hiss, will be faithfully reproduced at the receiver output.
· NORMAL applies enough noise reduction to remove most of the hiss from the microphone preamp and some of the hiss from lavaliere microphones. The noise reduction benefit is significant in this position, yet the degree of transparency maintained is exceptional.
· FULL applies enough noise reduction to remove most of the hiss from nearly any signal source of reasonable quality and some high frequency environmental noise, assuming the input gain is set properly at the transmitter.

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LR
Panels and Features

Three-Pin TA3 Male 1) Chassis ground (cable shield)
2) Positive polarity termianl for balanced audio circuits (aka “hot”)
3) Negative polarity terminal for balanced circuits (aka “cold”)

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IR PORT

AUDIO OUT

IR (infrared) Port

Balanced Audio Output

Antenna Inputs

Belt clip mounting
hole

USB Port

CAN ICES-3 (B)/NMB-3(B)
Model: LR-XX Made in the USA Serial No. XXXXX Frequency block XXX (XXX.X – XXX.X MHz)
This device complies with part 15 of the FCC rules. Operation is subject to the condition that this device
does not cause harmful interference.
CAN RSS-Gen/CNR-Gen

Battery polarity
IR (infrared) Port
Settings for compatibility mode and frequency can be transferred from the receiver via this port to an IR enabled transmitter to simplify setup. The receiver is used to scan for a clear frequency, and the new frequency can be sent to the transmitter via the IR ports.
Balanced Audio Output
Balanced or unbalanced audio from mic to line level is provided on the TA3 output jack; adjustable in 1 dB steps from -50 dBu to +5 dBu.

Battery Compartment Door
Antenna Inputs
Two standard 50 ohm SMA connectors can be used with whip antennas or coaxial cable connected to remote antennas.
Battery Compartment
Two AA batteries are installed as marked on the rear panel of the receiver. The battery door is hinged and remains attached to the housing.
USB Port
Firmware updates are made easy with the USB port on the side panel.

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LECTROSONICS, INC.

Keypad and LCD Interface

Compact Portable Receiver

Battery Status and RF Link LED Indicators

Alkaline, lithium or rechargeable batteries can be used to power the receiver. For accurate battery status indications, select the type of batteries you will be using in the menu.

Transmitter signal
received

RF signal strength

Battery status LED

RF LINK LED Glows blue when a valid RF signal is being received.
BATT LED Glows green when the batteries are good. As the batteries are drained, the LED will turn to a steady red at a mid-point during their life, then begin to blink red when only a few minutes of operation remain.
MENU/SEL Button Pressing this button enters the menu and selects menu items to enter the setup screens.
BACK Button Pressing this button returns to the previous menu or screen.
Power Button Turns the unit off and on and enters the power menu.
Arrow Buttons Used to navigate the menus.

RF LINK LED When a valid RF signal from a transmitter is received, this LED will light up blue. Depending upon the selected compatibility mode, a pilot tone may also be required to light up the LED and open the squelch on the receiver. If the necessary pilot tone is not present, but the RF signal is on the correct frequency, the RF level indicator on the LCD will display a signal presence, but the RF LINK LED will not light up.
BATT LED When the battery status LED on the keypad glows green the batteries are good. The color changes to red at a midpoint during the runtime. When the LED begins to blink red, only a few minutes remain.
The exact point at which the LED turns red will vary with battery brand and condition, temperature and power consumption. The LED is intended to simply catch your attention, not to be an exact indicator of remaining time.
A weak battery will sometimes cause the LED to glow green immediately after the transmitter is turned on, but it will soon discharge to the point where the LED will turn red or the unit will turn off completely.
Rechargeable batteries give little or no warning when they are depleted. If you wish to use these batteries in the receiver, you will need to manually keep track of the operating time to prevent interruptions caused by dead batteries.

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LCD Main Window
RF level Diversity Pilot activity tone

Frequency in MHz
Frequency band in use

Installing Batteries
Power is provided by two AA batteries. Alkaline, lithium or NiMH types can be used. The batteries are connected in series by a plate in the battery door.
WARNING: Risk of explosion if the battery is replaced by an incorrect type.

Audio Transmitter battery Frequency

Full

level

elapsed time

in hex code modulation

RF level The triangle graphic corresponds to the scale on the left side of the display. The scale indicates the incoming signal strength in microvolts, from 1 uV at the bottom to 1,000 uV (1 millivolt) at the top.
Diversity activity This icon flips upside down and back as the SmartDiversity antenna phase combining circuitry operates.
Pilot tone This icon will appear in compatibility modes where a supersonic pilot tone is used in squelch control. The icon will blink if a pilot is expected but not present on the incoming signal.
Frequency in MHz The example here shows the frequency expressed in MHz (megahertz) when the StepSize is set to 100 kHz. When the StepSize is set to 25 kHz, the display will include three numerals to the right of the decimal point.
Frequency in hex code The characters (CD in the above example) indicate the frequency expressed with hexadecimal numerals to simplify backward compatibility with older transmitters that use two rotary switches to set the operating frequency. See About Frequency Blocks on the next page for more information.
Frequency block in use The tuning range of the receiver covers three standard frequency blocks. The hex code numbers are repeated in each block, so the block number must be associated with the hex code number to define a frequency.
Transmitter battery elapsed time A timer is included to monitor the runtime of the transmitter, which is especially useful when using rechargeable batteries. The timer runs whenever a valid signal is being received from the transmitter, and stops when the signal is no longer being received. The display shows the accumulated runtime in hours and minutes. Timer is one of the choices in the TX Battery Menu.
Audio level This bar graph indicates the level of the audio entering the transmitter. The “0” at the right side of the graph indicates full modulation and the onset of limiting.

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Slide the battery door outward to
open it
Polarity is marked on the rear panel.
Polarity markings
LECTROSONICS, INC.

Navigating the Menus
Menu setup items are arranged in a vertical list on the LCD. Press MENU/SEL to enter the menu, then navigate with the UP and DOWN arrows to highlight the desired setup item. Press MENU/SEL to enter the setup screen for that item. Refer to the menu map on the following page.
Press MENU/ SEL to enter
the menu

Press MENU/ SEL to
enter the setup of the highlighted
item
Press BACK to return to the previous
screen

Press the UP and DOWN arrows to navigate and highlight the desired menu item

About Frequency Blocks
A 25.6 MHz block of frequencies, referred to as a Block, came about with the design of the first frequency tunable Lectrosonics wireless products. These products provided two 16-position rotary switches to select frequencies as shown in the illustration below. A logical method of identifying the switch positions was using 16 character hexadecimal numbering. This naming and numbering convention is still used today.
The 16 switch positions are numbered 0 (zero) through F, presented in a two- character designation such as B8, 5C, AD, 74, etc. The first character indicates the position of the left hand switch and the second character indicates the position of the right hand switch. This designator is commonly called a “hex code.”

Compact Portable Receiver

Each block spans 25.6 MHz. A simple formula is used to name the blockss according to the lowest frequency in each one. For example, the block starting at 512 MHz is named Block 20, since 25.6 times 20 equals 512.
As the available RF spectrum has changed, special blockss have been created to cover different blocks than the simple formula described above. Block 470, for example, is named according to the lower end of the frequency range, expressed in MHz, rather than the formula described above.
The L-Series wireless products tune across 3 blocks (except 606), and can tune in either 100 kHz or 25 kHz steps, as shown in the table below. Letter prefixes and a numeral designate the tuning range of a transmitter and receiver. Special subsets of each tuning range may become necessary, and if so, will have names such as A2, A3, etc.

Band
A1 B1 C1

Blocks covered
470 thru 20 21 thru 23 24 thru 26

Freq. (MHz)
470.1 – 537.5 537.6 – 614.3 614.4 – 691.1

The hex code is repeated in each 25.6 MHz block, so it will appear up to 3 times across one tuning range. For this reason, the block that a selected frequency falls within is in the upper right corner of the LCD, just above the hex code.
Band number

Hex code

F01

E

2

D

3

C

4

B

5

A

6

987

F0 1

E

2

D

3

C

4

B

5

A

6

987

FREQUENCY 1.6MHz 100kHz

On older transmitter models, the left hand switch makes steps in 1.6 MHz increments, the right hand switch in 100 kHz increments.

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LCD Menu Tree
The menus presented on the LCD are arranged in a straightforward manner, with those that are likely to be used more often located at the top of the tree.

Smart Tune SEL

Tx Block

BACK

B1 B1 NA 23 NA

21 Use arrow keys 22 to select desired 23 scanning range

wait SEL for
scan

Frequency

SEL

Frequency

BACK

Block 21 BB11 555.300 MHz

Press SEL to select desired adjustment step

IR Sync Press
Use arrow keys to select desired frequency

IR Sync

SEL

IR Sync

BACK

Press

Press UP arrow to start transfer

RF Scan

SEL

Press SEL to stop scanning,

select WideView, ZoomView

BACK or resume scanning

Use arrow keys to scroll cursor; SEL + arrow for fine steps

BACK

Keep scan freq? (select option)

Clear Scan SEL
BACK

scan data CLEARED

Audio Level

SEL

Audio Level

BACK

+05 dBu

Use arrow keys to select desired audio output level

SEL +

Toggles 1k tone output

Step Size

SEL

Step Size

BACK

100 kHz 25 kHz

Use arrow keys to select step size

Group

SEL

Group

BACK

Tx Battery SEL

Tx Battery

BACK

Rx Battery

SEL

Rx Battery

BACK

Compat.Mode SEL

Compat.Mode

BACK

Polarity

SEL

Polarity

BACK

Smart NR

SEL

Smart NR

BACK

SEL

Squelch Bypass

Sq. Bypass

BACK

Backlight

SEL

Backlight Time

BACK

LCD Mode

SEL

LCD Mode

BACK

Default

SEL

Retore Factory

BACK default settings

None W

U

X

V

Select from listings

Select from listings

Select from listings
Normal Inverted
Off Normal Full
Normal Bypass
Always On 30 Seconds 5 Minutes
Wht on Blk Blk on Wht
No Yes

Use arrow keys to select group
Use arrow keys to NOTE: The transmitter battery timer is select battery type included in the Tx Battery setup screen
Use arrow keys to select battery type
Use arrow keys to select compatibility mode
Use arrow keys to select audio output polarity
Use arrow keys to select noise reduction preference
Use arrow keys to enable or disable squelch (audio mute)
Use arrow keys to select LCD backlight duration
Use arrow keys to select LCD mode
Use arrow keys to accept or reject restoration of default settings

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Compact Portable Receiver

Menu Item Descriptions
Smart Tune
An automatic scanning function that identifies a usable frequency and sets the receiver on it. After the scan is complete, an option will appear to transfer the settings to an IR enabled transmitter. The receiver will remain set on the newly discovered frequency whether or not the IR transfer option was used.
Frequency
Allows manual selection of the operating frequency.
IR Sync
Transfers frequency, step size and compatibility mode from the receiver to the associated transmitter.
RF Scan
Launches the manual spectrum scanning function.
Clear Scan
Erases scan results from memory.
Audio Level
Adjusts the audio output level of the receiver.
Step Size
Selects 100 kHz or 25 kHz steps in the frequency adjustments.
Group
Convenient access to predetermined groups of frequencies. Each group, U, V, W and X can hold up to 32 channels each.
Tx Battery
Selects the type of battery being used in the associated transmitter for accurate battery status monitoring. The transmitter battery timer option is included in this setup screen.
Rx Battery
Selects the type of battery being used in the receiver for accurate battery status monitoring.
Compat. Mode
Selects the compatibility mode for use with a wide variety of Lectrosonics and other brands of transmitters.
Polarity
Selects the audio polarity (phase) of the receiver output to match other components and different microphone capsule wiring.
Smart NR
Selects the level of noise reduction applied to the audio signal.

Sq. Bypass

Defeats the audio muting (squelch) to allow audio output from the receiver regardless of the presence or lack of a matching transmitter. Used for diagnostic purposes.

Backlight

Selects the length of time the backlight on the LCD remains turned on.

LCD Mode

Selects the text/background appearance of the LCD.

Default

Returns all settings to the factory defaults:

Menu Item

Setting

Frequency
Audio Level Compat.Mode Smart NR Polarity Step Size LCD Mode
Tx Battery Rx Battery Battery Timer Sq. Bypass Tone output
Backlight Keypad status

8,0 (middle of lowest frequency block) 0 dBu NA Dig. Hybrid Normal Normal (not inverted) 100 kHz White characters on dark background AA alkaline Alkaline Reset to 0 Normal (squelch operational) Off (in Audio Level setup screen) Always on Not locked

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The Power Menu
Pressing the power button opens a menu with several options. Use the UP and DOWN arrows to select the option and press MENU/SEL to select the function or open a setup screen. Resume Returns to the previous screen and settings. Power Off Turns the power off. LockUnlock Opens a setup screen with options to Lock or Unlock the buttons. AutoOn? Allows the unit to automatically turn back on after a power failure or when fresh batteries are installed (works in the operating mode only). About Displays the splash screen shown at bootup, which includes the firmware version. Block 606 Enables Block 606 legacy mode for use with Block 606 receivers
NOTE: This feature is only avaialable on Bands B1 or C1.
System Setup Procedures
Summary of Steps

1. Install receiver batteries and select the battery type in the setup screen.

2. Select frequency step size in the receiver. 3) Select the compatibility mode in the receiver. 4) Find a clear operating frequency with one of two
   different methods (use one or the other). a) Using Smart TuneTM b) Manually 5) Set up transmitter to matching frequency and compatibility mode. 6) Adjust transmitter input gain. 7) Adjust receiver audio output level to match recorder, camera, mixer, etc.

3. Install Receiver Batteries
   Install the batteries according to the diagram marked on the back of the housing and select the battery type in the menu. Check the BATT LED on the control panel to verify adequate power is present – the LED should glow green.
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4. Select Frequency Step Size

Navigate to Step Size in the LCD menu and select 100 kHz or 25 kHz as needed to match the associated transmitter.

3. Select Receiver Compatibility Mode

Navigate to Compat.Mode on the menu and press MENU/SEL to enter the setup screen. The optional modes will appear one at a time. Use the UP and DOWN arrow buttons to scroll through the list. When the desired mode appears in the screen, press MENU/ SEL or BACK to select the mode and return to the previous menu. Press BACK to return to the Main Window.
Transmitter Models LCD menu item

Nu Digital Hybrid Wireless®

NU Dig. Hybrid

100 Series

100 Series

200 Series

200 Series

Mode 3*

Mode 3

NA Digital Hybrid Wireless®

NA Dig. Hybrid

IFB Series

IFB

Mode 6*

Mode 6

Mode 7*

Mode 7

300 Series

300 Series

Euro Digital Hybrid Wireless®

EU Dig. Hybrid

Japan Digital Hybrid Wireless®

JA Dig. Hybrid

NU Dig. Hybrid works with Lectrosonics Digital Hybrid transmitters using ETSI compliant Nu Digital Hybrid compatibility mode.

100 Series works with Lectrosonics UM100 transmitters.

200 Series works with legacy Lectrosonics models such as all UM200, UH200 and UT200 Series transmitters.

Mode 3 is a special compatibility mode for use with another brand of wireless. Contact the factory for details.

NA Dig. Hybrid is the best mode to use when both transmitter and receiver are North American Digital Hybrid Wireless models (not Euro/E01 variants).

IFB works with Lectrosonics models such legacy analog models bearing “IFB” in the model number, or Digital Hybrid Wireless models that offer the IFB compatibility mode.

Mode 6 is a special compatibility mode for use with another brand of wireless. Contact the factory for details.

Mode 7 is a special compatibility mode for use with another brand of wireless. Contact the factory for details.

300 Series works with legacy Lectrosonics transmitters that were sold in Europe, such as the UM300B and UT300.

LECTROSONICS, INC.

EU Dig. Hybrid works with Lectrosonics European Digital Hybrid transmitters with model numbers that end in “/E01.” For example, the SMDB/E01 transmitter is in this group.
JA Dig. Hybrid works with Lectrosonics Japanese Digital Hybrid transmitters.
4a) Find a Clear Frequency with Smart TuneTM
Optimum range will be realized if the system is set to a frequency where few or no other RF signals are present (a “clear” frequency). The receiver can select a clear frequency automatically with Smart TuneTM.
Navigate to Smart Tune in the LCD menu and press MENU/SEL to start the process. Select the desired range to be scanned, then press MENU/SEL to start the scan.

Compact Portable Receiver
Cursor scrolls across screen during scanning
When the scan is complete a screen will appear briefly to display the frequency chosen by Smart Tune, and then it will change to IR Sync. If you are using a Lectrosonics transmitter that has an IR port, the settings can be transferred from the receiver to the transmitter in a few seconds with a single button. As shown below, IR Sync will prompt you to place the receiver and transmitter close to one another and press the UP arrow button. Hold the units within two feet or so apart with the IR ports facing each other, then press the button. The transmitter LCD will display a message confirming the receipt of the settings.
NOTE: IR sync transfers the settings for frequency, step size and compatibility mode.

Entire tuning range

(NA) North American versions

Individual block

NOTE: “NA” next to the band numbers indicates the North American version which excludes the radio astronomy frequency allocation from 608 to 614 MHz.

If you are not using a Lectrosonics transmitter with an IR port, simply return to the Main Window and observe the frequency that was chosen by Smart Tune. Make sure the compatibility mode selected in the receiver is correct for the transmitter in use. Then set the transmitter on the frequency chosen by Smart Tune.
4b) Find a Clear Frequency Manually
Navigate to RF Scan on the menu and press MENU/ SEL to start the scanning. The LCD will display a marker that travels across the screen as a graphical image of the RF energy appears. The marker will wrap back to the beginning and continue to repeat.

Rio Rancho, NM

Strong RF energy Clear
spectrum
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LR
Press the MENU/SEL button to pause the scan. Use the UP and DOWN buttons to scroll the marker through the graphical image. Press MENU/SEL to increase the resolution while scrolling.

Use arrow buttons to scroll marker
Press MENU/SEL to increase the resolution in scrolling.
Press MENU/SEL to zoom in on the image. Scroll using the buttons as described above.

RF energy

Clear spectrum

After scrolling the marker to a spot in the clear spectrum in the display, press BACK to open a menu with three options.

Use the arrow keys to select the option, then press MENU/SEL to store the setting and return to the Main Window.
· Keep stores the new frequency and returns to the Main Window.
· Keep + IRSync stores the frequency, then moves to the IR Sync screen. Copy the frequency to the transmitter and then press BACK to return to the Main Window.
· Revert discards the new frequency and returns to the Main Window.
· Press BACK to return to scanning

5. Set Up Transmitter to Matching Frequency
   and Compatibility Mode
   If you have not already set the frequency on the transmitter in the previous procedures, use IR Sync or complete the settings manually.
   Lectrosonics transmitters with IR Sync: On the LR receiver, navigate to IR Sync on the menu and press the MENU/SEL button. Hold the transmitter and receiver fairly close to each other (within two feet or so) and position them so the IR ports are facing one another. Press the UP arrow on the receiver to initiate the transfer of settings. The receiver will display a message when the settings have been received.
   Other transmitters: Frequency, input gain, etc, are set with the controls on the transmitter. The correct compatibility mode must also be selected on the receiver.

6. Adjust Transmitter Input Gain

NOTE: This adjustment is very important, since it will determine the signal to noise ratio and dynamic range that the system will deliver.

Lectrosonics transmitters with LCD interface: The LEDs on the control panel provide an accurate indication of modulation level to assist in adjusting the input gain. The LEDs will glow either red or green to indicate modulation levels as shown in the following table. Full modulation is achieved at 0 dB, when the “-20” LED first turns red. The limiter can cleanly handle peaks up to 30 dB above this point.

Signal Level

-20 LED

-10 LED

Less than -20 dB

Off

Off

-20 dB to -10 dB

Green

Off

-10 dB to +0 dB

Green

Green

+0 dB to +10 dB

Red

Green

Greater than +10 dB

Red

Red

NOTE: It is best to go through the following procedure with the transmitter in the standby mode so that no audio will enter the sound system or recorder during adjustment.

1. With fresh batteries in the transmitter and power the unit on in the standby mode (a brief press on the power switch with L-Series transmitters).
2. Navigate to the Gain setup screen.

Gain LineIn Freq. ProgSw

Gain 25

-40

-20

0

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LECTROSONICS, INC.

Compact Portable Receiver

3. Prepare the signal source. Position a microphone the way it will be used in actual operation and have the user speak or sing at the loudest level that will occur during use, or set the output level of the instrument or audio device to the maximum level that will be used.
4. Use the and arrow buttons to adjust the gain until the ­10 dB glows green and the ­20 dB LED starts to flicker red during the loudest peaks in the audio.
5. Once the transmitter input gain has been set, the signal can be sent to the sound system or recorder for level adjustments, monitor settings, etc.
6. Do not use the transmitter input gain control to adjust the audio output level of the receiver.
   Other Transmitters: Earlier Lectrosonics transmitters provide LEDs to accurately indicate full modulation, with continuously variable gain controls for a precise adjustment. The LEDs operate in the same manner as those shown here for transmitters with an LCD interface.
   The UM400A transmitter shown below is typical of many legacy Lectrosonics models.
   LECTROSONICS
   UM400a

OFF ON

Input gain control

AUDIO LEVEL
­10
­20 ANTENNA

Modulation level LEDs

Some transmitters from brands other than Lectrosonics can also be used if the appropriate compatibility mode set is set in the receiver. Observe the audio level meter on the LR receiver LCD as you adjust the input gain on the transmitter to see the modulation level. Some models may have limiters on the input to suppress overload distortion, and others may not. Monitor the audio, preferably with headphones, as you adjust the input gain to find the maximum level that can be set without audible limiting or overload distortion.

7. Set Receiver Audio Output Level
   The audio output can be adjusted from -50 dBu (mic level) to +5 dBu (line level) in 1 dB steps. It is best to use an output level high enough to drive the connected device to an optimal level without the need for additional gain. If the receiver is set to full output and the level is still not sufficient to drive the connected device to an optimal level, then some gain will need to be applied by the connected device.
   A built-in tone generator makes matching the output level to the connected device easy and accurate.
8. Navigate to Audio Level in the LR receiver menu and press MENU/SEL to enter the setup screen. Use the arrow keys to reduce the level to minimum (-50 dBu).
9. Turn on the 1k tone (MENU/SEL + UP arrow) in the Audio Level setup screen.
10. On the connected device, set the input to “line level” if available. Turn the input gain control (e.g. record level) all the way down.
11. Gradually increase the output level on the receiver while observing the input level meter on the connected device. Increase the level until the input level meter indicates 3 or 4 dB below maximum. This “optimal level” will protect against overloading the input with a very loud peak in the audio.
12. If this optimal level cannot be achieved, even with the receiver output turned all the way up, increase the input gain control on the connected device gradually until this level is achieved.
    Once this level match has been set, leave these settings alone and make adjustments from one event to another with the input gain control on the transmitter.
    Tuning Groups
    For quick, convenient access to predetermined groups of frequencies, four user customizable groups, U,V, W and X, are available, and can each hold up to 32 channels.
    Activitating a Tuning Group
13. Navigate to Group on the menu and press MENU/ SEL to enter the setup screen.
14. Use the UP and DOWN arrows to scroll through the options, None (Default), U, V, W or X. Choose the desired tuning group and press MENU/SEL to return to the menu.

Rio Rancho, NM

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LR
3) Navigate to Frequency on the menu and press MENU/SEL to enter the setup screen. Once a tuning group is active, the group’s name is displayed in the Frequency setup screen.
The selected frequency number is displayed next to the Group
name
4) Hold down MENU/SEL and press the UP and DOWN arrows to select the desired frequency number (32 are available). If the desired number is blinking, press the power button to enable it. Press the power button again to disable it.
NOTE: The tuning group selector blinks any time the tuning group item does not match the current settings of the receiver. If blinking, the frequency has not been saved.
5) Once you’ve enabled the frequency number with the power button (not blinking), press MENU/SEL to highlight the desired method of adjusting the frequency – Block, MHz or Hex Code.

Antenna Orientation
The antennas are most sensitive perpendicular to the axis of the whip. The pattern is a toroidal (donut) shape surrounding the antenna. A cross section of the pattern is depicted in the illustrations below.
The best orientation is to keep the antenna whips elevated and oriented vertically to provide a circular pattern around the transmitter and receiver. The whips can point up or down.
The receiver can be mounted horizontally and swiveling antennas can be adjusted to keep the whips in a vertical orientation, as shown in Fig. 2.
It is also good practice to keep the antennas away from metallic surfaces.

Fig. 1

STRONG SIGNAL

Rx

Tx

Fig. 2

Hex Code

Press MENU/SEL repeatedly to browse through the settings. The
selected setting is highlighted.

Block MHz

With the item selected, use the UP/DOWN arrows to change the setting. When the value is changed, the frequency number will start blinking.Press the power button to store the setting (characters stop blinking).

Rx

STRONG SIGNAL Rx
Tx
Fig. 3
WEAK SIGNAL
Tx
Fig. 4

Rx

WEAKEST SIGNAL

Tx

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LECTROSONICS, INC.

Supplied Accessories
AMJ(xx) Rev. A Whip antenna; swiveling. Specify frequency block (see chart below).

Compact Portable Receiver
MCSRXLR Audio cable; LR output; TA3F to XLR-M; 12 inch length.

26895 Wire belt clip. Supplied installed on the transmitter.

MC51 Adapter cable; TA3F to 1/4 inch-M; 30 inch length.

40096 (2) Alkaline batteries. Brand may vary.

LRBATELIM Battery eliminator replaces the batteries and door, allowing to be powered from an external DC source.

AMM(xx) Whip antenna; straight. Specify frequency block (see chart below).

Optional Accessories
MCSRTRS Audio cable; dual LR output; two TA3F to one 3.5 mm male TRS; 11 inch length.
MCLRTRS Audio cable; LR output; TA3F to 3.5 mm TRS male; 20 inch length. Wired for mono output (tip and ring are combined).

About Whip Antenna Frequencies: Frequencies for whip antennas are specified by the block number. For example, AMM-25 is the straight whip model cut to the block 25 frequency.

L-Series transmitters and receivers tune across a range covering three blocks. The correct antenna for each of these tuning ranges is the block in the middle of the tuning range.

Band Blocks covered Ant. Freq.

A1

470, 19, 20

Block 19

B1

21, 22, 23

Block 22

C1

24, 25, 26

Block 25

LRSHOE Accessory shoe mount; requires 26895 belt clip.

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LR

Firmware Update
To place the LR Reciever in update mode, press both the UP and DOWN arrow while simultaously pressing the POWER button. Then download a utility program and file from the website and run the program on a Windows operating system with the transmitter connected to a computer via the USB port.
Go to www.lectrosonics.com/US. In the top menu, hover the mouse over Support, and click on Firmware. Choose your product (L-Series Firmware), then choose LR Firmware Update.
Step 1:
Begin by downloading the USB Firmware Updater Program.

Step 2:
Next, test the Updater by opening the icon: driver opens automatically, proceed to Step 3.

If the

WARNING: If you receive the following error, the Updater is not installed on your system. Follow the TROUBLESHOOTING steps to fix the error.

TROUBLESHOOTING:
If you receive the FTDI D2XX error shown above, download and install the driver by clicking on this link.
Then click here to download.
NOTE: This website, http://www.ftdichip.com/ Drivers/D2XX.htm, is not associated with Lectrosonics.com. It is a third party site used only for D2XX drivers currently available for Lectrosonics’ devices’ upgrades.

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LECTROSONICS, INC.

Compact Portable Receiver

Step 3:
Refer to Step 1 to return to Firmware web page. Download Firmware Update and save to a local file on your PC for easy locating when updating.

Step 7:
In Lectrosonics USB Firmware Updater, choose the detected device, browse to local Firmware File and click Start.
NOTE: It may take up to a minute or so for the Updater to recognize the transmitter.

WARNING: Do not disrupt the microUSB cable during updating.

Step 4:
Open Lectrosonics USB Firmware Updater.

Step 5:

Using a microUSB cable, connect the transmitter to your PC.

Step 6:

Rio Rancho, NM

Put the transmitter in UPDATE mode by simultaneously holding down the UP and DOWN arrow buttons on the transmitter control panel while powering it up.

The Updater alerts with progress and completion.
Step 8:
Once the Updater has completed, turn off the transmitter, then turn it back on to verify that the firmware version on the transmitter LCD matches the firmware version shown on the web site. The firmware is located on the first LCD display during boot up sequence, top right-hand corner.
Step 9:
Close Updater and disconnect microUSB cable.
19

LR

Specifications

Operating Frequencies:

Tuning range A1:

470.100 – 537.575 MHz

Tuning range B1:

537.600 – 614.375 MHz*

Tuning range C1:

614.400 – 691.175 MHz

*North American transmitter models exclude the radio astronomy

frequency allocation from 608 to 614 MHz.

Frequency selection steps: Selectable; 100 kHz or 25 kHz

Receiver Type:

Dual conversion, superheterodyne

IF Frequencies:

243.950 MHz and 250.000 kHz

Frequency stability:

±0.001 %

Front end bandwidth:

20 MHz @ -3 dB

Sensitivity: 20 dB SINAD: 60 dB Quieting:

1.0 uV (-107 dBm), A weighted 2.2 uV (-100 dBm), A weighted

Squelch quieting:

Greater than 100 dB typical

Modulation acceptance:

+/-100 kHz max.; varies with selected compatibility mode

Image and spurious rejection: 85 dB

Third order intercept:

0 dBm

Diversity method:

SmartDiversityTM phased antenna combining

FM detector:

Digital Pulse Counting Detector

RF spectrum analyzer:

Single and multiple scanning modes with coarse and fine views of results

Antenna inputs:

50 Ohm; SMA female connectors

Audio output:

TA3 male (mini XLR) balanced output

Audio output level:

Adjustable -50 to +5 dBu in 1 dB steps (unbalanced output level is 6 dB lower)

Front panel controls and indicators:

· Sealed panel with membrane switches · LCD for setup menus and monitoring

Audio test tone:

1 kHz, -50 dBu to +5 dBu output (bal); .04% THD

Transmitter battery type selection: Audio polarity selection: Compatibility modes:
SmartNR (noise reduction):
Audio Performance: Frequency Response: THD:
Top panel features: Battery types: Current consumption: Operating runtime: Operating temperature: Weight: Dimensions (housing):

· AA alkaline · AA lithium · Timer available for use with all types
Normal or inverted
· Digital Hybrid (North American) · Digital Hybrid (European) · Digital Hybrid (NU) · Digital Hybrid (Japanese) · Lectrosonics 100 · Lectrosonics 200 · Lectrosonics 300 · Lectrosonics IFB · Non-Lectrosonics mode 3 · Non- Lectrosonics mode 6 · Non-Lectrosonics mode 7
(contact the factory for details)
· OFF · NORMAL · FULL (available in Digital Hybrid modes only)
32 Hz to 20 kHz (+/- 1 dB) receiver only (see transmitter documentation for overall system response)
< 0.4 (0.2% typical in Digital Hybrid mode)
· TA3M audio output jack; · (2) SMA antenna jacks · IR (infrared) port
· AA alkaline · AA Lithium · AA NiMH rechargeable
310mA @ 5V, 130mA @ 12V, 65mA @25V
4 hours, (Duracell Quantum Alkaline)
-20° C to +50°C
221 grams (7.1 ozs.) with two AA alkaline batteries and two AMJ-Rev. A antennas
3.21 x 2.45 x .84 in. (82 x 62 x 21 mm)

Specifications subject to change without notice

20

LECTROSONICS, INC.

Compact Portable Receiver
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 the interconnecting cables.
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
For timely service, please follow the steps below:
A. DO NOT return equipment to the factory for repair without first contacting us by e-mail 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 A.M. to 4 P.M. (U.S. 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 or FEDEX 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.

Lectrosonics USA:
Mailing address: Lectrosonics, Inc. PO Box 15900 Rio Rancho, NM 87174 USA

Shipping address: Lectrosonics, Inc. 561 Laser Rd., Suite 102 Rio Rancho, NM 87124 USA

Telephone: +1 505-892-4501 800-821-1121 Toll-free US and Canada Fax +1 505-892-6243

Web: www.lectrosonics.com

E-mail: service.repair@lectrosonics.com sales@lectrosonics.com

Lectrosonics Canada:
Mailing Address: 720 Spadina Avenue, Suite 600 Toronto, Ontario M5S 2T9

Telephone: +1 416-596-2202 877-753-2876 Toll-free Canada (877) 7LECTRO Fax 416-596-6648

E-mail: Sales: colinb@lectrosonics.com Service: joeb@lectrosonics.com

Rio Rancho, NM

21

LR

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LECTROSONICS, INC.

Compact Portable Receiver

Rio Rancho, NM

23

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.

581 Laser Road NE · Rio Rancho, NM 87124 USA · www.lectrosonics.com +1(505) 892-4501 · fax +1(505) 892-6243 · 800-821-1121 US and Canada · sales@lectrosonics.com

28 December 2021

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