Related Manuals for Lectrosonics HM
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.
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Page 3: Table Of Contents
AA lithium or recharge- Operating Instructions ............8 Power Up and Boot Sequence ..........8 able batteries. The HM is machined from a solid alumi- Power Down ................8 num block to provide a lightweight and rugged package. Standby Mode ...............8 A special non-corrosive finish resists salt water expo- Compatibility Mode Screen ...........8... -
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
Once locked, the buttons can be unlocked only by re- The XLR input jack on the HM Series transmitters ac- moving the battery, or via the RM remote control (if this commodates most hand-held microphones. -
Page 7: Battery Installation
Battery Installation Attaching/Removing a Microphone The HM transmitter is powered by two AA batteries. We recommend using lithium batteries for longest life. Lithium batteries provide over 12 hours of operation at The spring loaded coupler under the XLR jack maintains room temperature. -
Page 8: Operating Instructions
Button Note: RF transmission is prevented while selecting Power Up and Boot Sequence Compatibility Modes. Also, the HM exits the Compatibility Mode screen to the Standby Mode. 1) Ensure that good batteries are installed in the unit. •... -
Page 9: Lcd Backlight Settings
This conforms to the Lectrosonics tradition of setting the operating frequency using two 16-posi- tion rotary switches. The HM offers the ability to set the operating frequency in a similar manner. Pressing the FREQ button while the LCD displays the operat-... -
Page 10: Audio Screen
The audio input level can be set with the unit in Standby Mode or while Selecting the Phantom Power Supply powered up in normal operation. With the HM transmitter powered on and in the RF on Signal Level -20 LED -10 LED... -
Page 11: About The Phantom Power Supply
The HM improves on those functions and is able to use less power from the battery by using constant current sources and current limiters. With this dynamic ar-... -
Page 12: Using The Polarity-Reversing Barrel Adapter
This polarity adapter may be needed if you are experi- encing noise, low output or distortion with measurement microphones such as the Earthworks model M30 or Rode model NTG3. Insert the adapter between the transmitter and micro- phone to alleviate the problems listed above. Barrel Adapter LECTROSONICS, INC. -
Page 13: Accessories
Included with transmitter at purchase. MC5AX Optional adapter for connecting a lavaliere microphone to the HM transmitter. TA5M to XLR3-M connectors. Passes transmitter phantom power to bias the electret lavaliere microphone. Includes zener protection to limit bias voltage to protect the microphone if transmitter phantom power is set too high. -
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) Operating range too great. 4) 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.
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Page 16: Specifications And Features
The FCC requires that the following statements be included in this manual: 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. -
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 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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