User's Manual

Digital Hybrid
™
Plug-On Transmitter
Rio Rancho, NM
3
Table of Contents
General Technical Description .............................................. 4
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, PLL and VCO Circuits................................. 5
Compatibility Modes .............................................................. 5
Control Panel ........................................................................ 5
Wide-Band Deviation ............................................................ 5
Battery Options and Operating Time .................................... 5
Frequency Blocks .................................................................. 5
Circulator/Isolator .................................................................. 5
Controls and Functions ......................................................... 6
LCD Screen .......................................................................... 6
Power LED ............................................................................ 6
Audio Input Jack .................................................................... 6
Battery Compartment............................................................ 6
Modulation LEDs ................................................................... 6
Audio Button ......................................................................... 6
Freq Button ........................................................................... 6
Up/Down Arrows ................................................................... 6
Antenna ................................................................................. 6
Setup with the LCD ................................................................. 7
Audio Screen ........................................................................ 7
Frequency Screen ................................................................. 7
Compatibility Mode Screen ................................................... 7
Turning the Power On ........................................................... 7
Turning the Power Off ........................................................... 7
Entering the Standby Mode .................................................. 7
Lock/Unlock Screen .............................................................. 7
Battery Installation ................................................................. 8
Operating Instructions ........................................................... 9
Power Up and Boot Sequence .............................................. 9
Power Down .......................................................................... 9
Standby Mode ....................................................................... 9
Selecting the Compatibility Mode .......................................... 9
Setting Transmitter Operating Frequency ............................ 10
Adjusting the Low Frequency Roll-off ................................. 10
Attaching a Microphone and Adjusting Gain ....................... 10
Locking or Unlocking the Control Panel .............................. 11
Attaching/Removing a Microphone ..................................... 11
Accessories .......................................................................... 13
Troubleshooting .................................................................... 14
Specifications and Features ................................................ 16
Service and Repair ............................................................... 17
Returning Units for Repair .................................................. 17
Thank you for selecting a Lectrosonics HM 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 efficiency
as analog systems, the same long battery life as analog
systems, plus the excellent audio fidelity typical of pure
digital systems.
The HM transmitter uses a standard XLR input jack
for use with most brands of handheld mics. 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, with-
out having to view the receiver. The battery compart-
ment accepts AA lithium or rechargeable batteries. The
HM is machined from a solid aluminum block to provide
a lightweight and rugged package. A special non-corro-
sive finish resists salt water exposure and perspiration
in extreme environments.
The DSP-based design works with all Digital Hybrid
recievers, 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.