Lectrosonics SMV - Manual (Page 10)

SMV Series
LECTROSONICS, INC. 10
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: Different voices will usually require different gain set-
tings, 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 indi-
vidual, 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 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 occasionally flickering red.
This will maximize the signal to noise ratio of the
system with full modulation and provide subtle limit-
ing 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.
Locking or Unlocking the Controls
Control Panel Locked
The Lock mode protects the
transmitter from accidental
changes to its settings.
Simultaneously press both
the Up and Down arrow
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 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.
Setting Transmitter Operating Frequency
Frequency displayed
in MHz
Frequency displayed as
two-digit hexadecimal
number
The frequency can be
displayed either in MHz or
as a two-digit hexadecimal
number and can be set in
the Standby Mode or when
the transmitter is powered
up. The hexadecimal
numbering system is unique
to Lectrosonics where two
alphanumeric characters
correspond to the left and
right switch settings on
earlier analog transmitters that had mechanical rotary
switches to adjust frequency.
1) Press the FREQ button to select either the MHZ
screen or the hexadecimal screen.
2) While holding the FREQ button, use the Up or
Down arrow buttons to move the operating fre-
quency up or down in 100 kHz increments from the
current setting.
Note: The operating frequency displayed on the
LCD wraps as it reaches the upper or lower end of
its range.
Most Lectrosonics receivers with an LCD interface
indicate the operating frequency both in MHz and as a
two digit hexadecimal number. In many cases, it is more
convenient to use the two charcter hexadecimal num-
bers rather than the six character frequency in MHz.
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 fre-
quency with the UP and DOWN arrows.
The roll-off frequency can be set to 35, 50, 70, 100, 120
and 150 Hz.
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.