Lectrosonics HMA-941 Series, Instruction Manual

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Plug-on UHF Transmitter
Rio Rancho, NM
9
Hold DOWN arrow at turn on.
Hold the DOWN arrow button in while pressing both
AUDIO and FREQ buttons to access the setup screens
below. It’s easier if you lay the unit on a flat surface and
use two hands to press all three buttons at the same
time. After the first screen loads, press the AUDIO but-
ton repeatedly to switch between the settings. Press the
UP and DOWN arrow buttons for the desired selection.
After the settings are made, press both AUDIO and
FREQ buttons together to exit and turn the power off.
rc (remote control with mobile app)
Allows the transmitter to respond to remote control
“dweedle” tones from a mobile device, or from tones
generated by the Lectrosonics RM and RM2 devices.
on Enables the remote function.
oFF
Disables the remote function.
PbAc (auto power restore)
Sets the transmitter to automatically turn back on and
return to the previous state after a battery change or
power interruption when it is in the operating mode.
1 Restores power automatically
0 Does not restore power automatically
bL (backlight settings)
Adjusts how long the LCD stays lit after pressing
buttons.
5 5 minutes
30
30 seconds
on
Stays on
AUDIO Button
When the unit is turned on in either the Standby or
Operating Mode, pressing the AUDIO button repeatedly
switches between the available settings.
• LF (XX) adjusts the low frequency roll-off of the
audio signal.
• AUD (XX) adjusts the input gain
LF (XX) - Adjusting the Low Frequency Roll-off
Repeatedly press the AUDIO button until the LF roll-
off adjustment screen appears. Then press and hold
the AUDIO button while selecting the desired roll-off
frequency with the UP and DOWN arrows.
The roll-off frequency can be set to 35, 50, 70, 100, 120
and 150 Hz.
AUD (XX) - Adjusting Audio Level (Gain)
It’s generally a good idea to adjust the low frequency
roll-off before setting the gain, since it could affect the
gain adjustment. The control panel modulation LEDs
marked -10 and -20 indicate the audio level and lim-
iter activity. Once adjusted according to the following
procedure, the transmitter’s audio level setting should
not
be used to control the volume of your sound system
or recorder levels. This gain adjustment matches the
transmitter gain with the microphone’s output level, the
user’s voice level and the position of the microphone.
The audio input level (gain) should be adjusted with the
unit in the Standby Mode while observing the LEDs.
It is generally best to set the LF roll-off before adjust-
ing the gain, since low frequency energy can affect the
input level to the transmitter.
It is desirable to to set the gain so that some limiting
occurs on louder peaks. The limiter is very transparent
over a 43 dB range, and its effect is not audible until the
system is close to overload. In other words, don’t be shy
about turning up the gain.
It is actually a good idea to turn the gain up to maxi-
mum and listen for distortion or compression to get a
feel for how much headroom is available.
Signal Level -20 LED -10 LED
Less than -20 dB
Off Off
-20 dB to -10 dB
Green Off
-10 dB to +0 dB
Green Green
+0 dB to +10 dB
Red Green
Greater than +10 dB
Red Red
Note: If several different people will be using the transmitter
and there is not time to make the adjustment for each indi-
vidual, adjust it for the loudest voice.
1) With the transmitter in the Standby Mode, plug in
the microphone and make sure the connector is
firmly seated.
Warning: If the wireless system is powered
up while connected to a live sound system, be
careful to turn the sound system level down
first or severe feedback can occur.
2) Position the microphone in the location where it will
be used in actual operation.
3) Observe the modulation LEDs while speaking or
singing into the microphone at the same voice level
that will be used during operation. While holding
the AUDIO button, press the UP or DOWN arrow
buttons until the both the -20 and -10 LEDs glow
green, with the -20 LED flickering red during louder
peaks in the audio. This will maximize the signal to
noise ratio of the system with full modulation.
4) If the unit was set up in Standby Mode, it will be
necessary to turn the transmitter off, then power it
up again in normal operation so the RF output will
be on. Then the other components in the sound or
recording system can be adjusted.