INSTRUCTION MANUAL LT Synthesized UHF Belt-Pack Transmitter Featuring Digital Hybrid Wireless® Technology US Patent 7,225,135 Quick Start Steps 1) Install good batteries and turn power on (see pages 6 - 8). 2) Set the compatibility mode to match the receiver (see page 11). 3) Connect the signal source and adjust input gain for optimum modulation level (see pages 11 and 12). 4) Set Step Size and frequency to match receiver (see page 12).
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Digital Hybrid Wireless Belt-Pack Transmitter Table of Contents Quick Start Steps...................................................................................................................................................................................1 Introduction..............................................................................................................................................................................................4 About Digital Hybrid Wireless®...............
LT Introduction The design of the LT transmitter delivers the advanced technology and features of Digital Hybrid Wireless® in a Lectrosonics belt-pack transmitter at a modest cost. Digital Hybrid Wireless® combines a 24-bit digital audio chain with an analog FM radio link to eliminate a compandor and its artifacts, yet preserve the extended operating range and noise rejection of the finest analog wireless systems.
Digital Hybrid Wireless Belt-Pack Transmitter DSP-controlled Input Limiter Pilot Tone Squelch The squelch system in a receiver is a method of muting the audio when the RF signal conditions are too poor to produce usable audio. While not all squelch systems work the same way, the goal is always the same: to discard noise and unusable audio. The transmitter employs a digitally-controlled analog audio limiter prior to the analog-to-digital converter.
LT Battery Installation The transmitter is powered by two AA batteries. We recommend using alkaline, lithium, or rechargeable batteries for longest life. Standard zinc-carbon batteries marked “heavy-duty” or “long-lasting” are not adequate. The battery status circuitry compensates for the difference in voltage drop between alkaline and lithium batteries across their usable life, so it’s important to select the correct battery type in the menu.
Digital Hybrid Wireless Belt-Pack Transmitter Operating Instructions Modulation Indicators Antenna Port Power/Function LED -10 PWR/FUNC AUDIO Full access to all settings is provided through the keypad and LCD. The transmitter can also be configured as a “one button” device by locking the ability to make changes with the keypad, and configuring the top panel switch as either power on/off or a mute function.
LT Powering On in Standby Mode Entering the Power Menu A brief press of the Power Button , releasing it before the counter has reached 3, will turn the unit on with the RF output turned off. In this Standby Mode the menus can be browsed to make settings and adjustments without the risk of interfering with other wireless systems nearby. RF indicator blinks Hold for Rf On ...1 Release Power Button before the counter reaches 3 to enter standby mode b 19 51 494.
Digital Hybrid Wireless Belt-Pack Transmitter LCD Menu Map Gain SEL LineIn SEL Freq. SEL ProgSw Rolloff Gain 22 BACK Polarity BACK Freq BACK SEL ProgSw BACK SEL Rolloff BACK 70 Hz Select from listing Use arrow keys to select input gain Line Instr. Use arrow keys to select audio output polarity b 21 80 550.
LT Main Menu and Setup Screen Details Main Window Indicators The Main Window displays the band number, Standby or Operating mode, operating frequency, audio level, battery status and programmable switch function. When the frequency step size is set at 100 kHz, the LCD will look like the following. Locking/Unlocking Changes to Settings Changes to the settings can be locked.
Digital Hybrid Wireless Belt-Pack Transmitter Top Panel LED will blink blue when the audio is muted -10 494.500 <–MUTE–> -20 MUTE AUDIO 51 Connecting the Signal Source PWR/FUNC Main Window will blink the word MUTE when the audio is muted b 19 Using Line Level and Instrument Inputs If the programmable switch function is set for Talkback, the Main Window will indicate that the function is enabled but not active. b 19 51 TB -40 -20 0 TB 494.
LT Adjusting the Input Gain Selecting Step Size The two bicolor Modulation LEDs on the control panel provide a visual indication of the audio signal level entering the transmitter. The LEDs will glow either red or green to indicate modulation levels as shown in the following table.
Digital Hybrid Wireless Belt-Pack Transmitter A fraction will appear next to the hex code in the setup screen and in the main window when the frequency ends in .025, .050 or .075 MHz. Freq. b 19 51 1 4 b 19 51 41 MUTE 494.525 Fraction appears next to hex code in 25 kHz mode 494.525 -40 -20 0 Selecting Frequency Using Two Buttons Hold the MENU/SEL button in, then use the arrow buttons for alternate increments. 100 kHz Mode Freq. b 19 1 MHz steps and 1 block steps 100 kHz steps 51 494.
LT Enabling Remote Control Transmitter settings can be configured using special tones generated by a smartphone using a remote control application such as Lectro RM (available on the AppStore or Google Play). Enable this feature on the transmitter with the following menu items.
Digital Hybrid Wireless Belt-Pack Transmitter LectroRM Android By New Endian LLC LectroRM is a mobile application for iOS and Android operating systems. Its purpose is to remotely control Lectrosonics Transmitters, including: • SM Series • WM • L Series The app remotely changes settings on the transmitter through the use of encoded audio tones, which when received by the attached microphone, will alter the configured setting. The app was released by New Endian, LLC in September 2011.
LT Accessories P/N 26895 Wire belt clip BCSLEBN Spring-loaded belt clip LTBATELIM Battery eliminator; allows transmitter to be operated from external power; 6 to 36 VDC LTCVR Silicone cover protects from moisture and dust M152/5P Lavaliere microphone; omnidirectional MI33PRA Instrument cable; passive type for use with very high output pickups; right angle 1/4” plug MI33PST Instrument cable; passive type for use with very high output pickups; straight 1/4” plug MI39AST Instrument cable; activ
Digital Hybrid Wireless Belt-Pack Transmitter 5-Pin Input Jack Wiring Audio input jack wiring: The wiring diagrams included in this section represent the basic wiring necessary for the most common types of microphones and other audio inputs. Some microphones may require extra jumpers or a slight variation on the diagrams shown. PIN 1 Shield (ground) for positive biased electret lavaliere microphones. Shield (ground) for dynamic microphones and line level inputs.
LT Microphone Cable Termination for Non-Lectrosonics Microphones TA5F Connector Assembly Mic Cord Stripping Instructions 1 4 5 2 3 VIEW FROM SOLDER SIDE OF PINS 0.15" 0.3" Crimping to Shield and Insulation Strip and position the cable so that the clamp can be crimped to contact both the mic cable shield and the insulation. The shield contact reduces noise with some microphones and the insulation clamp increases ruggedness.
Digital Hybrid Wireless Belt-Pack Transmitter Input Jack Wiring for Different Sources In addition to the microphone and line level wiring hookups illustrated below, Lectrosonics makes a number of cables and adapters for other situations such as connecting musical instruments (guitars, bass guitars, etc.) to the transmitter. Visit www.lectrosonics.com and click on Accessories, or download the master catalog.
LT Microphone RF Bypassing Line Level Signals When used on a wireless transmitter, the microphone element is in the proximity of the RF coming from the transmitter. The nature of electret microphones makes them sensitive to RF, which can cause problems with microphone/transmitter compatibility.
Digital Hybrid Wireless Belt-Pack Transmitter Firmware Update Updating the firmware is a simple matter of downloading a utility program and file from the website and running 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 Wireless Support. On the right-hand-side Wireless Support Menu, choose Wireless Downloads. Choose your product (LT), then choose Firmware.
LT Step 3: Step 7: 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. 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.
Digital Hybrid Wireless Belt-Pack Transmitter Troubleshooting It is important that you follow these steps in the sequence listed. Symptom: Possible Cause: Transmitter Battery LED off when Power Switch “ON” 1. Batteries are inserted incorrectly. 2. Batteries are low or dead. No Transmitter Modulation LEDs when Signal Should be Present 1. 2. 3. 4. 5. 6. Gain control turned all the way down. Batteries are inserted incorrectly. Check power LED. Mic capsule is damaged or malfunctioning.
LT Specifications Operating Frequencies: Band A1: 470.100 - 537.575 Band B1: 537.600 - 607.950 Frequency Selection Steps: Selectable; 100 kHz or 25 kHz RF Power output: Selectable: 50 or 100mW Compatibility Modes (3): Nu Hybrid, IFB, Mode 3 Pilot tone: 3.5 kHz deviation (Nu Hybrid) Frequency Stability: ± 0.002% Spurious radiation: Compliant with ETSI EN 300 422-1 v1.4.
Digital Hybrid Wireless Belt-Pack Transmitter 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 and then go through the Troubleshooting section in this manual.
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Digital Hybrid Wireless Belt-Pack Transmitter Rio Rancho, NM 27
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.
