Lectrosonics HM Instruction Manual
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Lectrosonics HM Instruction Manual

Plug-on transmitter with digital hybrid wireless technology
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HM
Plug-On Transmitter
With Digital Hybrid Wireless
Digital Hybrid Wireless
US Patent 7,225,135
Fill in for your records:
Serial Number:
Purchase Date:
Technology
™
INSTRUCTION MANUAL
Rio Rancho, NM, USA
www.lectrosonics.com

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Summary of Contents for Lectrosonics HM

  • Page 1 INSTRUCTION MANUAL 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.com...
  • Page 2 LECTROSONICS, INC.

  • Page 3: Table Of Contents

    Setup with the LCD ..............7 ment accepts AA lithium or rechargeable batteries. The Audio Screen ................ 7 HM is machined from a solid aluminum block to provide Frequency Screen ..............7 a lightweight and rugged package. A special non-corro- Compatibility Mode Screen ...........

  • Page 4: General Technical Description

    General Technical Description Wideband Design channel as efficiently and robustly as possible, yield- The HM transmitter uses ±75 kHz wide deviation for an ing audio performance that rivals that of wholly digital excellent signal to noise ratio and wide dynamic range.

  • Page 5: Input Limiter

    Mode and that the correct pilot tone is added to the encoded signal. Compatibility Modes The HM transmitter was designed to operate with Lectrosonics Digital Hybrid receivers and will yield the best performance when doing so. However, due to the...

  • Page 6: Controls And Functions

    Audio Input Jack Antenna The XLR input jack on the HM Series transmitters ac- commodates most hand-held microphones. An antenna is formed between the housing and the at- tached microphone, operating much like a dipole type.

  • Page 7: Setup With The Lcd

    Holding the AUDIO button in Standby Mode displays • 200 - This mode works with all Lectrosonics 200 the current audio input level setting. This level can be Series compatible receivers. changed by holding the AUDIO button and pressing •...

  • Page 8: Battery Installation

    The HM transmitter is powered by two AA batteries. With the controls locked, the AUDIO and FREQ buttons We recommend using lithium batteries for longest life.

  • Page 9: Operating Instructions

    The LCD displays a bootup sequence which con- 1) Set the receiver’s audio controls to minimum. sists of four screens: 2) Power up the HM and observe the Boot Sequence. Company Name: Lectro If the Compatibility Mode for the HM does not...

  • Page 10: Setting Transmitter Operating Frequency

    1) With the HM powered off, insert the microphone Note: The operating frequency displayed on the plug into the Audio Input Jack, aligning the pins and LCD wraps as it reaches the upper or lower end of ensuring that the connector locks.

  • Page 11: Locking Or Unlocking The Control Panel

    The unit will The HM improves on those functions and is able to use always power up in “unlocked” mode. less power from the battery by using constant current sources and current limiters.
  • Page 12 LECTROSONICS, INC.

  • Page 13: Accessories

    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. Rio Rancho, NM...

  • Page 14: Troubleshooting

    3) Sound system or recorder input is turned down. DISTORTED SOUND 1) Transmitter gain (audio level) is far too high. Check HM LEDs and receiver audio levels as HM is being used. 2) Receiver output may be mismatched with the sound system or recorder input.
  • Page 15 Digital Hybrid Plug-On Transmitter ™ SYMPTOM POSSIBLE CAUSE HISS AND NOISE -- AUDIBLE DROPOUTS 1) Transmitter gain (audio level) far too low. 2) Receiver antenna missing or obstructed. 3) Transmitter antenna broken or missing. 4) Operating range too great. 5) 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.

  • Page 16: Specifications And Features

    17 mV to 1.7 V before limiting. Greater than 50 V with limiting. Input impedance: 300 Ohms Input limiter: Soft limiter, 30 dB range Bias voltages: Selectable; 0, 5, 15. 48 Volts Gain control range: 44 dB; panel mounted membrane switches LECTROSONICS, INC.

  • Page 17: Service And Repair

    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.
  • Page 18 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.
  • Page 19 Digital Hybrid Plug-On Transmitter ™ Rio Rancho, NM...

  • Page 20: Limited One Year Warranty

    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.

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