Lectrosonics SMa User Manual download pdf (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.

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Lectrosonics SMa User Manual Page 6

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