Lectrosonics SMa - Manual (Page 6)

SMa Series
Controls and Functions
Modulation
LEDs
Battery
LCD
Compartment
UP Arrow
Cover Plate
Audio
Input Jack
Battery
Compartment
Thumb Screw DOWN Arrow
PWR LED AUDIO Button FREQ Button
LCD Screen
The LCD is a numeric-type Liquid Crystal Display with
several screens that allow settings to be made with the
AUDIO, FREQ, UP and DOWN to configure the trans­
mitter. Turn on and turn off countdowns appear in the
LCD allowing the transmitter to be turned on for adjust­
ments without the output stage enabled, and to prevent
accidental turn off.
Power LED
The PWR LED glows green when the battery is good.
The color changes to red when there is about 30
minutes of operation left with the recommended lithium
battery. An alkaline battery will have about 20 minutes
of life left. When the LED begins to blink red, there are
only a few minutes of life.
Note: A NiMH battery will give little or no warning
when it is depleted. If you wish to use NiMH
batteries in the SM, we recommend trying fully
charged batteries in the unit, noting the length of
time that the batteries will run the unit and then
using the battery timer feature available on most
Digital Hybrid receivers.
A weak battery will sometimes cause the PWR LED to
glow green immediately after being put in the unit, but
will soon discharge to the point where the LED will go
red or shut off completely. When the SM is in SLEEP
mode, the LED blinks green every few seconds (See
Sleep Mode, page 8).
Audio Input Jack
The Servo Bias input on the SM Series transmitters
accommodates virtually every lavaliere, handheld or
shotgun microphone available, plus line level signals.
Battery Compartment and Thumb Screw
The large knurled thumbscrew is used to release or
secure the Battery Compartment Cover Plate, allowing
access to the battery.
Modulation LEDs
The Modulation LEDs provide a visual indication of the
input audio signal level from the microphone. These two
bicolor LEDs can glow either red or green to indicate
modulation levels. 0 dB in the table below indicates full
modulation.
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
Audio Button
The AUDIO button is used to display the audio level
setting and low frequency roll-off. The UP and DOWN
arrows adjust the values.
The AUDIO button is also used with the FREQ button to
enter standby mode and to power the transmitter on or off.
Freq Button
The FREQ Button displays the selected operating
frequency and also toggles the LCD between displaying
the actual operating frequency in MHz and a two-digit
hexadecimal number that corresponds to the equivalent
Lectrosonics Frequency Switch Setting.
The FREQ button is also used with the AUDIO button to
enter standby mode and to power the transmitter on or off.
Up/Down Arrows
The Up and Down arrow buttons are used to select the
operating frequency, adjust the audio level, or set the
Compatibility Mode.
Pressing both arrows simultaneously enters the lock
countdown. Holding the two arrow buttons until the
countdown completes locks the control panel buttons so
they can only be used to display current settings. “Loc”
is displayed to indicate the controls are locked.
Once locked, the buttons can be unlocked only by re­
moving the battery, or via the RM remote control (if this
function was enabled in the transmitter setup).
Antenna
The flexible antenna is built with woven, galvanized
steel mesh cable, cut to the 1/4 wavelength of the
center of the frequency block of the transmitter. The
antenna is extremely rugged and moisture resistant.
LECTROSONICS, INC. 6