INSTRUCTION MANUAL HM Plug-On Transmitter With Digital Hybrid Wireless™ Technology Digital Hybrid Wireless US Patent 7,225,135 Fill in for your records: Serial Number: Purchase Date: Rio Rancho, NM, USA www.lectrosonics.
HM 2 LECTROSONICS, INC.
Digital Hybrid™ Plug-On Transmitter Thank you for selecting a Lectrosonics HM Plug-On transmitter.
HM General Technical Description Wideband Design The HM transmitter uses ±75 kHz wide deviation for an excellent signal to noise ratio and wide dynamic range. The DSP controlled input limiter features a wide range dual envelope design which cleanly limits input signal peaks over 30 dB above full modulation. Switching power supplies to provide constant voltages to the transmitter circuits from the beginning (3 Volts) to the end (1.
Digital Hybrid™ Plug-On Transmitter Input Limiter A DSP-controlled analog audio limiter is employed before the analog-to-digital (A-D) converter. The limiter has a range of more than 30 dB for excellent overload protection. A dual release envelope makes the limiter acoustically transparent while maintaining low distortion. It can be thought of as two limiters in series, a fast attack and release limiter followed by a slow attack and release limiter.
HM Controls and Functions Input Coupler Modulation LEDs LCD UP Arrow Battery Compartment Cover input audio signal level from the microphone. These two bicolor LEDs can glow either red or green to indicate modulation levels. 0 dB in the table below indicates full modulation.
Digital Hybrid™ Plug-On Transmitter Setup with the LCD LCD screens and membrane switches are used to set the operating frequency, adjust the audio input level, select the Compatibility Mode, turn power on and off and to lock out the control panel. Audio Screen The Audio screen is used to adjust input gain and low frequency roll-off, and to turn phantom power on and off. Repeatedly pressing the AUDIO button selects the setting.
HM The LCD will display the locked condition as long as the arrow buttons are held, then revert back to the previous screen when either button is released. With the controls locked, the AUDIO and FREQ buttons can still be used to display current settings. Any attempt to change a setting by pressing either the Up or Down arrow button will result in an on-screen “Loc” reminder that the controls are locked. Remove the batteries to unlock the control panel.
Digital Hybrid™ Plug-On Transmitter Operating Instructions Standby Mode Power Up and Boot Sequence 1) Ensure that good batteries are 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 operation, i.e.
HM Setting Transmitter Operating Frequency Attaching a Microphone and Adjusting Gain Frequency displayed in MHz The Operating Frequency of the HM can be displayed either in MHz or as a two-digit hexadecimal number. (See Controls and Functions, FREQ Button.) The Frequency displayed as HM’s operating frequency can two-digit hexadecimal be set with the unit in Standby number Mode or powered up for normal operation.
Digital Hybrid™ Plug-On Transmitter Locking or Unlocking the Control Panel Control Panel Locked The Lock mode protects the transmitter from accidental changes to its settings. 1) Ensure the HM setup is complete (operating frequency, 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 locked.
HM 12 LECTROSONICS, INC.
Digital Hybrid™ Plug-On Transmitter Accessories PHTRAN2 Cordura Pouch with belt clip and velcro flap. (Included with TX) MC5AX TA5 to XLR adapter for connecting a lavaliere microphone to the HM.
HM Troubleshooting Before going through the following chart, be sure that you have good batteries in the transmitter. It is important that you follow these steps in the sequence listed. SYMPTOM POSSIBLE CAUSE TRANSMITTER PWR LED OFF 1) 2) AUDIO LEVEL LEDs NOT LIGHTING 1) 2) 3) 4) Battery is inserted backwards or dead. Transmitter not powered up. (See Operating Instructions, Power UP and Boot Sequence.) Gain control set to minimum. Battery is dead or installed backwards. Check PWR LED.
Digital Hybrid™ Plug-On Transmitter SYMPTOM POSSIBLE CAUSE HISS AND NOISE -- AUDIBLE DROPOUTS 1) 2) 3) 4) 5) Transmitter gain (audio level) far too low. Receiver antenna missing or obstructed. Transmitter antenna broken or 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 interfering signal may be the problem. Try a different operating frequency.
HM Specifications and Features Operating frequencies: Block 470 470.100 - 495.600 Block 19 486.400 - 511.900 Block 20 512.000 - 537.500 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 - 767.900 Block 944 944.100 - 951.
Digital Hybrid™ Plug-On 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.
HM The FCC requires that the following statements be included in this manual for SM Series transmitters: For body worn operation, this HM Transmitter has been tested and meets the FCC RF exposure guidelines when used with the Lectrosonics accessories supplied or designated for this product. Use of other accessories may not ensure compliance with FCC RF exposure guidelines. Contact Lectrosonics if you have any questions or need more information about RF exposure using this product..
Digital Hybrid™ Plug-On 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.
