User Manual - HMA

HMa
LECTROSONICS, INC.
12
Accessories
P/N 21750 Barrel Adapter
Mic adapter for Earthworks M30 micro-
phone with HM, HMa and UH400a/TM
transmitters.
This polarity reversing adapter may be
needed to correct for asymmetrical cur-
rent draw in some P48 powered condenser
microphones, including older Neumann
100 Series, Rode NTG3 and others. If your
microphone does not power on correctly
when used with these transmitters, insert
the adapter between the transmitter and
microphone.
MCA-M30 Barrel Adapter
This adapter may be needed if you are experiencing
noise or distortion with measurement microphones,
particularly the Earthworks M30. The adapter has
common mode checks for suppressing RF noise. If
your microphone signal exhibits the problems listed
above when connected to a UH400, HM or HMa trans-
mitter, insert the adapter between the microphone and
the transmitter.
Insert the adapter between the transmitter and micro-
phone to alleviate the problems listed above.
Remote Control with
“Dweedle Tones”
Various settings on the transmitter can be adjusted
with special audio tones (“dweedle tones”) delivered to
the microphone. The tones are generated by a smart
phone using the LectroRM app.
LectroRM is a third party application written by New
Endian for iOS and Android smart phones that gener-
ates the control tones for the remote control functions.
The app is available for purchase from the App Store
or Google Play for about $20.
HMa transmitter settings that can be adjusted:
• Audio input level (gain)
• Operating frequency
• Panel Lock/Unlock
• RF power output
• Low frequency roll-off filter
• Power LED on/off
Enable the remote control function by holding the
DOWN arrow then pressing the AUDIO and FREQ
buttons at the same time. Use the arrow buttons to
select on to enable the function, or oFF to disable
the function.
If a remote control signal is detected but the function
is turned off, the message rc oFF will be displayed
briefly on the transmitter’s LCD to confirm that a valid
signal was received, but that the control function is
not enabled. If a remote control setting is delivered to
the transmitter that is not available, such as SLEEP/
UNSLEEP in the HMa, the display on the transmitter
will show – – – – – – and then return to the previous
screen.
The usable distance between the microphone and the
smart phone will vary with the input gain setting on the
transmitter and the volume control setting on the smart
phone.
NOTE: Any microphone/transmitter within range
of the smart phone will “hear” and execute the
remote control command. Be careful to make
sure only the desired microphone/transmitter is
within range when delivering the audio tone.
Barrel Adapter Earthworks M30