LECTROSONICS, INC.6
Audio Screen Menu
The Audio Screen is used to adjust input gain and
low frequency roll‑off, and to turn phantom power
on and off. Repeatedly pressing the AUDIO button
selects the setting. Press and hold the AUDIO
button and use the UP and DOWN arrows to
adjust the value.
Adjusting the Input Gain (Audio Screen Menu)
The control panel Modulation LEDs indicate the modulation level and limiter
activity. This gain adjustment matches the transmitter gain with the micro‑
phone’s output level, the user’s voice level and the position of the microphone.
Once set, the transmitter’s audio level setting should not be used to control
the volume of your sound system or recorder levels. The audio input level can
be set with the unit in Standby Mode or while powered up in normal operation.
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: Voice levels vary significantly between different people. If several
different people will be using the transmitter and there is not time to
make the adjustment for each individual, adjust it for the loudest voice.
1) With the HMa powered off, insert the microphone plug into the XLR Input
Jack, aligning the pins and ensuring that the connector locks.
2) Place the transmitter in the Standby Mode, or if the unit is to be powered
up and adjusted, mute the main sound system prior to powering up the
transmitter.
3) Position the microphone in the location where it will be used in actual
operation.
4) Observe the audio level LEDs while speaking or singing into the micro‑
phone at the same voice level that will be used during use. While holding
the AUDIO button, press the UP or DOWN arrows until both the ‑20 and
‑10 LEDs glow green, with the ‑20 LED flickering red on louder peaks.
This will optimize the signal to noise ratio of the system with full modula‑
tion and adequate headroom to prevent overload and audible compres‑
sion of signal peaks.
Note: Setting the audio level too high reduces the dynamic range of the
audio signal. Setting the audio level too low may cause hiss and noise
in the audio.
