INSTRUCTION MANUAL SM Super Miniature Belt-Pack Transmitter With Digital Hybrid Wireless™ Technology Fill in for your records: Serial Number: Purchase Date: Rio Rancho, NM, USA www.lectrosonics.
SM Thank you for selecting the Lectrosonics SM ultra-min iature transmitter.
Super-Minature Belt Pack Transmitter Table of Contents General Technical Description ..............................................................................................................................................................4 Introduction ...........................................................................................................................................................................................4 Servo Input....................................................
SM General Technical Description Introduction The SM transmitter uses ±75 kHz wide deviation for an extremely high signal to noise ratio, switching power supplies to provide constant voltages to the transmitter circuits from the beginning (1.5 Volts) to the end (0.85 Volts) of battery life, and an ultra low noise input amplifier for quiet operation. It is gain protected with a wide range dual envelope input limiter which cleanly limits input signal peaks over 30 dB above full modulation.
Super-Minature Belt Pack Transmitter actual roll-off frequency will vary somewhat according to the low frequency response of the mic capsule being used. The low frequency roll-off is used to remove subsonic (or very low frequency) audio, often produced by air conditioning systems, automobile traffic and other sources from the audio signal. Excessive low frequency content in the audio input can cause a variety of audio problems including driving the transmitter into limiting.
SM Controls and Functions Modulation LEDs Battery Compartment Cover Plate Control Panel LCD Signal Level UP Arrow Antenna Battery Compartment Thumb Screw PWR LED Audio Input Jack AUDIO Button FREQ Button LCD Screen The LCD is a numeric-type Liquid Crystal Display used in conjunction with the AUDIO and FREQ buttons, and the UP and Down arrows, to configure the SM. (See SM SCREEN SELECTIONS.) It is also used with the Modu lation and PWR LEDs to monitor system operation.
Super-Minature Belt Pack Transmitter SM Screen Selections Six screens are used to set up and operate the SM. These screens are used to set the operating frequency, adjust the audio modulation level, select the Compatibil ity Mode or lock the control panel and power down the transmitter. Audio Screen The Audio screen is the default screen at the end of the power up boot sequence. It can also be accessed by pressing the AUDIO button during normal operation.
SM Quickly pressing both the AUDIO and FREQ buttons from a power off condition plac es the unit in Standby Mode. In this mode, the screen displays “rf OFF” to inform the user that Standby Screen the unit is not transmitting. rF OFF Holding the FREQ button in Standby Mode displays the current operating frequency of the transmitter. The op erating frequency can be changed by holding the FREQ button and pressing either the Up or Down button.
Super-Minature Belt Pack Transmitter Operating Instructions Power Up and Boot Sequence 1) Ensure that a good battery is installed in the unit. (See Battery Installation.) 2) Simultaneously press and hold the AUDIO and FREQ buttons until the Power On Boot Sequence is initiated. (See Power On Timer.) As the unit turns on, the Modulation LEDs and PWR LED all glow red, then green, and then they revert to normal op eration, i.e.
SM Setting Transmitter Operating Frequency The Operating Frequency of the SM can be displayed either in MHz or as a two-digit hexadecimal number. (See Controls and Functions, FREQ Button.) The SM’s operating frequency can be set with the unit in Standby Mode or powered up for normal operation.
Super-Minature Belt Pack Transmitter The Lock mode protects the transmitter from accidental changes to its settings. 1. Ensure the SM setup is complete (operating fre quency, audio level, Compatibility Mode, sensitivity to remote control). 2. Simultaneously press both the Up and Down arrow buttons to start the Lock timer. When the timer reaches zero, “Loc” is displayed and the controls are Control Panel Locked locked.
SM 5-Pin 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 micro phones may require extra jumpers or a slight variation on the diagrams shown. It’s virtually impossible to keep completely up to date on changes that other manufacturers make to their prod ucts. It is possible that you may encounter a microphone that differs from these instructions.
Super-Minature Belt Pack Transmitter Wiring Hookups for Different Sources In addition to the wiring hookups illustrated below, Lec trosonics makes a number of cables and adapters for other situations such as connecting musical instruments (guitars, bass guitars, etc.) to the transmitter. These cables can be found in our UHF or Accessories cata logs. Visit www.lectrosonics.com, or contact the factory for more information. The most radical change is that pin 4 is now a voltage selector pin.
SM 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 PWR LED OFF 1) 2) NO TRANSMITTER MODULATION LEDs 1) 2) 3) 4) RECEIVER RF INDICATOR OFF 1) 2) 3) 4) Battery is inserted backwards or dead. Transmitter not powered up. (See Operating Instructions, Power UP and Boot Sequence.
Super-Minature Belt Pack Transmitter SYMPTOM HISS AND NOISE -- AUDIBLE DROPOUTS EXCESSIVE FEEDBACK POSSIBLE CAUSE 1) 2) 3) 4) 5) Transmitter gain (audio level) far too low. Receiver antenna missing or obstructed. Transmitter antenna missing. Operating range too great. Signal interference. Turn off transmitter. If receiver’s signal strength indicator does not drop to nearly zero, this indicates an interferring signal may be the problem. Try a different operating frequency.
SM 16 LECTROSONICS, INC.
Super-Minature Belt Pack Transmitter Specifications and Features Operating frequencies: Block 21 537.600 - 563.100 Block 22 563.200 - 588.700 Block 23 588.800 - 607.900 and 614.100 - 614.300 Block 24 614.400 - 639.900 Block 25 640.000 - 665.500 Block 26 665.600 - 691.100 Block 27 691.200 - 716.700 Block 28 716.800 - 742.300 Block 29 742.400 - 767.
SM 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 interconnect ing cables and then go through the TROUBLESHOOTING section in this 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.
Super-Minature Belt Pack Transmitter Rio Rancho, NM 19
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.
