Adjusting Audio Level (Gain); Locking Or Unlocking The Controls; Attaching And Removing The Microphone - Lectrosonics SMDB/E01 Series Instruction Manual

SMB/EO1 Series

Adjusting Audio Level (Gain)

The control panel Modulation LEDs indicate the audio
level and limiter activity. Once set, 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) is adjusted with the unit in the Standby Mode or
while powered up while observing the LEDs.
It is desirable to to set the gain so that some limiting
occurs on louder peaks. The limiter is very transparent
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. In fact, it is a good idea to turn the gain
up to maximum and listen for distortion or compres-
sion to get a feel for how much headroom the system
actually has.
Signal Level -20 LED
Less than -20 dB
-20 dB to -10 dB
-10 dB to +0 dB
+0 dB to +10 dB
Greater than +10 db
Note: Different voices will usually require
different gain settings, so check this adjustment
as each new person uses the system. 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 transmitter powered off, plug in the mi-
crophone and make sure the connector is firmly
seated.
Warning: If the systems 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) Place the transmitter in Standby Mode or turn it
on for normal use.
3) Position the microphone in the location where it
will be used in actual operation.
4) Observe the Modulation LEDs while speaking or
singing into the microphone at the same voice
level that will be used during use. 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 occasionally flickering
red. This will maximize the signal to noise ratio of
the system with full modulation and provide subtle
limiting to prevent overload and audible compres-
sion.
5) 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.
20
-10 LED
Off Off
Green Off
Green Green
Red Green
Red Red

Locking or Unlocking the Controls

Control Panel Locked
the Up and Down arrow buttons to start the count-
down timer. When the timer reaches zero, "Loc" is
displayed and the controls are locked. Settings can be
reviewed but not changed.
Once the transmitter is locked, it cannot be unlocked or
powered off using the buttons. The only ways to unlock
a locked transmitter are to remove the battery or unlock
it using the remote control. The remote control will work
only if the transmitter was previously configured to
respond to the remote control. The unit will always
power up in "unlocked" mode.

Attaching and Removing the Microphone

The flexible sleeve over the 5-pin plug on the micro-
phone helps prevent dust and moisture from getting
into the input jack. A flange is machined into the rim
of the connector on the transmitter to help retain the
sleeve after it is installed.
The following procedure simplifies the attachment and
removal of the microphone to assure the sleeve is
seated securely.
Align the pins on the plug and jack and insert the con-
nector.
1
2
Pinch and
squeeze the
sleeve on this end
to work it down
over the flange.
3
Release button
The Lock mode protects
the transmitter from
accidental changes to its
settings.
Simultaneously press both
If the sleeve is pulled down
and covering the connec-
tor, squeeze the end of the
sleeve so you can feel the
connector inside and press it
into the jack until it latches.
Pinch and squeeze the
sleeve near the flange and
work it down with a kneading
motion over the flange all the
way around until it stays in
place flush with the housing.
Pull on the connector to
make sure it is firmly latched.
To remove the connector,
pull the sleeve back to
expose the black release
button. Press the button to
unlatch the plug.
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