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

SMB/EO1, SMB/E02 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 compression 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
compression.
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.
10
-10 LED
Off Off
Green Off
Green Green
Red Green
Red Red

Locking or Unlocking the Controls

Control Panel Locked
buttons to start the countdown 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 function. The remote function will
work only if the transmitter was previously configured to
respond. 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.
Pinch and
squeeze the
sleeve on this
end to work it
down over the
Release button
The Lock mode protects the
transmitter from accidental
changes to its settings.
Simultaneously press both
the Up and Down arrow
If the sleeve is pulled
down and covering the
connector, 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 connec-
tor, pull the sleeve back
to expose the black
release button. Press the
button to unlatch the
plug.
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