Lectrosonics Inc HMAA1 用户手册

Wideband Digital Hybrid

®

 Plug-On Transmitter

Rio Rancho, NM

3

Thank you for selecting a Lectrosonics HMa plug-On 
transmitter. The unique design provides several distinct 
features for professional applications:

•  Outstanding RF operating range

•  Superb audio quality

•  Corrosion-resistant housing

•  Programmable compatibility modes for use with a 

wide variety of different receivers

The Digital Hybrid Wireless

®

 design (US Patent 

7,225,135) combines 24-bit digital audio with analog 
FM resulting in a system that has the same operating 
range as analog systems, the same spectral eficiency 
as analog systems, the same long battery life as analog 
systems, plus the excellent audio idelity typical of pure 
digital systems.

The transmitter uses a standard 3-pin XLR input jack for 
use with any microphone with a a mating XLR connec-
tor. An LCD, membrane switches and multi-color LEDs 
on the control panel make input gain adjustments and 
frequency and compatibility mode selection quick and 
accurate, without having to view the receiver. The hous-
ing is machined from a solid aluminum block to provide 
a lightweight and rugged package. A special non-corro-
sive inish resists salt water exposure and perspiration 
in extreme environments.

The DSP-based design works with all Digital Hybrid 
receivers, and is backward compatible for use with 
Lectrosonics 200 and 100 Series and IFB receivers and 
some other brands of analog wireless receivers. Com-
panion receivers are covered in separate manuals.

Table of Contents

Wideband Design ...................................................................4
Digital Hybrid Wireless

®

 Technology ......................................4

No Pre-Emphasis/De-Emphasis ............................................4
Low Frequency Roll-Off .........................................................4
Input Limiter ...........................................................................5
Signal Encoding and Pilot Tone .............................................5
Microprocessor and DSP .......................................................5
Compatibility Modes ...............................................................5
Control Panel .........................................................................5
Battery Options and Operating Time .....................................5
Frequency Blocks and Bands ................................................5

LCD Screen ...........................................................................6
Power LED .............................................................................6
Audio Input Jack .....................................................................6
Battery Compartment.............................................................6
Modulation LEDs ....................................................................6
Audio Button ..........................................................................6
Up/Down Arrows and Panel Lockout ......................................6
Antenna ..................................................................................6

Power Up and Boot Sequence ...............................................8
Power Down ...........................................................................8
Automatic Power Restore .......................................................8
Standby Mode ........................................................................8
Compatibility Mode Screen ....................................................8
Selecting the Audio Polarity ...................................................8
LCD Backlight Settings ..........................................................9
Selecting Step Size mode ......................................................9
Setting Transmitter Operating Frequency ...............................9
Lock/Unlock Screen ...............................................................9
Audio Screen .......................................................................10
Adjusting the Input Gain .......................................................10
Adjusting the Low Frequency Roll-off ..................................10
Selecting the Phantom Power Supply ..................................10
About the Phantom Power Supply .......................................11
Special Purpose Barrel Adapters .........................................12
MCA-M30 .............................................................................12

Returning Units for Repair ...................................................17

Consumer Alert for US Users - FCC Order DA 10-92

Most users do not need a license to operate this wireless microphone system. Nevertheless, operating this microphone system 
without a license is subject to certain restrictions: the system may not cause harmful interference; it must operate at a low power 
level (not in excess of 50 milliwatts); and it has no protection from interference received from any other device. Purchasers should 
also be aware that the FCC is currently evaluating use of wireless microphone systems, and these rules are subject to change. For 
more information, call the FCC at 1-888- CALL-FCC (TTY: 1-888-TELL-FCC) or visit the FCC’s wireless microphone website at 
www.fcc.gov/cgb/wirelessmicrophones.   To operate wireless microphone systems at power greater than 50mW, you must qualify as 
a Part 74 user and be licensed. If you qualify and wish to apply for a license go to: http://www.fcc.gov/Forms/Form601/601.html