Controls And Functions; Lcd Screen; Pwr Led; Audio Input Jack - Lectrosonics SM Operating Instructions Manual

SM
Battery Compartment
Cover Plate
Battery Compartment
Thumb Screw

Modulation LEDs

-10
-20

PWR LED

LCD SCREEN

The LCD is a numeric-type Liquid Crystal Display used
in conjunction with the AUDIO and FREQ buttons, and
the UP and Down arrows, to configure the SM. (See SM
SCREEN SELECTIONS.) It is also used with the
Modulation and PWR LEDs to monitor system operation.
PWR LED
The PWR LED glows green when the battery is good.
The color changes to red when there is about 30 min-
utes of operation left with the recommended lithium
battery. (An alkaline battery will have about 20 minutes
of life left.) When the LED begins to flicker red, there are
only a few minutes of life.
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 400 Series 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.

AUDIO INPUT JACK

The input on the SM accommodates virtually every
lavaliere, hand-held or shotgun microphone available.
Different line level signals can also be accommodated.
(See LINE LEVEL SIGNALS and 5-PIN INPUT JACK
WIRING .)
6

CONTROLS AND FUNCTIONS

Audio Button

Freq Button

Note
Professional Audio Products Since 1971
LCD
Up/Down Buttons
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.
Signal Level
Less than -20 dB
-20 dB to -10 dB
-10 dB to +0 dB
+0 dB to +10 dB
Greater than +10 dB
AUDIO BUTTON
Pressing the AUDIO button alone causes the LCD to
display the audio level setting (0 dB to 44 dB). This level
is adjustable via the Up and Down arrows.
Simultaneously pressing the AUDIO button and FREQ
button will power the transmitter on or off.
FREQ BUTTON
The SM provides 256 individual frequencies, in 100 kHz
increments, across a 25.5 MHz frequency block. The
FREQ Button toggles the LCD between displaying the
actual operating frequency in MHz or a two-digit hexa-
decimal number that corresponds to the equivalent
Lectrosonics Frequency Switch Setting.
Antenna
Audio Input Jack
-20 LED -10 LED
Off
Off
Off
Green
Green
Green
Green
Red
Red
Red