This unique plug-on transmitter design will ideally match any microphone or line level source via a standard XLR connector. Phantom power is selectable at 5, 15 and 48 volts, or can be turned off for use with dynamic microphones and line level signal sources.
The design includes a wide tuning range of up to 76 MHz, with tuning steps in increments of 100 kHz or 25 kHz, (19 MHz for block 941 version, for 695 frequencies).
Along with providing peerless audio quality with wide frequency response and dynamic range in Nu Hybrid mode, the technology used in the HMa includes compatibility modes for Lectrosonics Mode 3 and IFB receivers.
This model is not capable of firmware updates in the field so no files are available for download. Contact Lectrosonics if you need a firmware update.
HM Firmware History
This model is not capable of firmware updates in the field so no files are available for download. Contact Lectrosonics if you need a firmware update.
HM v2.5 – 23 December 2014
Unit now turns itself off when battery voltage is too low for stable operation. This eliminates noises in the audio just before the battery fails completely, and also prevents repeated power cycling at the end of battery life.
HM v2.4 – 23 December 2014
Added 25 kHz tuning step mode. Also applied minor cosmetic fixes to user interface and factory serial commands, and slightly improved dynamic tracking accuracy in compatibility mode 6.
HM v2.3 – 03 December 2012
Shaped battery telemetry signaling for slightly lower noise floor. Also added new factory diagnostic functions.
HM v2.2 – 20 September 2012
Increased power level (and thus the accuracy) of the microprocessor brownout detection circuit.
HM v2.1 – 15 August 2012
Added powerup delays, checksums and multiple read attempts to ensure robustness of non-volatile memory. Created a protected memory storage class for crucial system setup and calibration parameters. No user-apparent changes were made since v2.0.
HM v2.0 – 27 February 2012
Introduced new hardware variant with backlight feature.
HM v1.6 – 29 December 2010
Increased battery telemetry adjustment range and scaling, and added autorepeat to the battery telemetry adjustment screen, for faster and easier factory alignment and fewer component changes. No user perceptible changes were made; however, upgrading to this (or newer) versions will require recalibration of the battery telemetry adjustment.
HM v1.5 – 10 October 2010
Added 10 dB additional gain control range. Also added optional audio polarity inversion feature. Fixed factory diagnostic “rolloff=” serial command.
HM v1.4 – 23 September 2009
CHANGES
- Adjusted battery warning thresholds for LED indicator.
- Adjusted power off timings to ensure receivers have enough time to mute before carrier turns off.
- Added new serial commands for testing department.
HM v1.3 – 18 August 2009
DSP code, which formerly worked only on the TMS320VC5402 DSP, is now also compatible with the TMS320VC5402A. Firmware may be used on logic boards populated with either DSP. Nothing else has changed since v1.2.
HM v1.2 – 06 August 2009
Audio mute status is now correctly displayed in RF-off mode. Improved accuracy of compatibility mode 3.
HM v1.1 – 23 April 2009
First production release.
HM/E01 Firmware History
This model is not capable of firmware updates in the field so no files are available for download. Contact Lectrosonics if you need a firmware update.
HM/E01 v2.6 – 29 October 2014
Fixed problem wherein LCD backlight would turn off at incorrect times.
HM/E01 v2.5 – 24 October 2014
Unit now turns itself off when battery voltage is too low for stable operation. This eliminates noises in the audio just before the battery fails completely, and also prevents repeated power cycling at the end of battery life.
HM/E01 v2.4 – Not released separately: Rolled into v2.5.
Added 25 kHz tuning step mode. Also applied minor cosmetic fixes to user interface and factory serial commands, and slightly improved dynamic tracking accuracy in compatibility mode 6. “Normalized” the already-supported block 606 by adding it to factory block setting menu.
HM/E01 v2.3 – 10 December 2012
Shaped battery telemetry signaling for slightly lower noise floor. Also added new factory diagnostic functions.
HM/E01 v2.2 – 17 October 2012
Increased power level (and thus the accuracy) of the microprocessor brownout detection circuit. Added powerup delays, checksums and multiple read attempts to ensure robustness of non-volatile memory. Created a protected memory storage class for crucial system setup and calibration parameters.
HM/E01 v2.1
NOT RELEASED
HM/E01 v2.0 – 06 June 2012
New hardware variant with backlight feature.
HM/E01 v1.5 – 02 August 2011
Increased battery telemetry adjustment range and scaling, and added autorepeat to the battery telemetry adjustment screen, for faster and easier factory alignment and fewer component changes. No user perceptible changes were made; however, upgrading to this (or newer) versions will require recalibration of the battery telemetry adjustment. Also added factory standby command.
HM/E01 v1.3 – 23 September 2009
CHANGES
- Adjusted battery warning thresholds for LED indicator.
- Adjusted power off timings to ensure receivers have enough time to mute before carrier turns off.
- Added new serial commands for testing department.
HM/E01 v1.2 – 18 August 2009
DSP code, which formerly worked only on the TMS320VC5402 DSP, is now also compatible with the TMS320VC5402A. Firmware may be used on logic boards populated with either DSP. Nothing else has changed since v1.1.
HM/E02 Firmware History
This model is not capable of firmware updates in the field so no files are available for download. Contact Lectrosonics if you need a firmware update.
HM/E02 v2.4 – 24 February 2015
- Added pilot tone level calibration capability, accessed via serial commands.
- Adjusted modulation limiter parameters to match other products.
- Fix bug preventing firmware updates using the Lectrolink adapter.
HM/E02 v2.3 – 07 November 2014
Fix bug allowing tuning past the highest channel on block 27. This firmware behaves identically to v2.2 on all other blocks.
HM/E02 v2.2
First production release covering standard blocks.
HM/E02-779 Firmware History
This model is not capable of firmware updates in the field so no files are available for download. Contact Lectrosonics if you need a firmware update.
HM/E02-779 v2.1 – 06 April 2011
Corrected deviation in mode 3. Also added “rfmute” diagnostic command for factory testing.
HM/E02-779 v1.2 – 06 April 2011
Added 10 dB additional gain control range. Also added optional audio polarity inversion feature. Fixed a bug wherein changing frequencies could result in an incorrect modulation level.
HM/E02-779 v1.1 – 23 September 2009
- Adjusted battery warning thresholds for LED indicator.
- Adjusted power off timings to ensure receivers have enough time to mute before carrier turns off.
- Added new serial commands for testing department.
HM/E02-779 v1.0 – 17 June 2009
First production release.
