Lectrosonics LM - Manual (Page 6)

LM/IM
Controls and Functions
Mic Input Jack
The 5-pin (Switchcraft TA5F compatible) input accom­
modates virtually every lavaliere, hand-held or shotgun
microphone available, and most musical instrument
signals. Line level signals can also be accommodated.
(See 5-Pin Input Jack Wiring.)
Power ON/OFF Switch
The Power ON/OFF switch turns the transmitter on and
off. A pilot tone muting system prevents “thumps” or
transients from occurring at the reciever even if the
transmitter is abruptly switched on or off.
Power LED
The Power LED glows green when the transmitter is
operating and the battery is good. It turns red when the
battery voltage drops to 6.1 VDC and starts blinking red
when the voltage drops to 5.6 VDC. When using a
recommended lithium or alkaline battery, there will be
about 30 minutes of operating time remaining when the
Power LED first begins blinking red.
Note: A weak battery will sometimes cause the
Power LED glow green, but it will soon discharge
to the point where the Power LED will glow red or
go out completely. If in doubt, replace the battery
with a known new battery. If the Power LED fails
to glow when the transmitter is turned on, replace
the battery.
NiMH batteries give little or no warning when they are
depleted. If you wish to use NiMH batteries in the
transmitter, you will need to manually keep track of the
operating time. Start with a fully charged battery, then
measure the time it takes for the Power LED to go out
completely. A number of Lectrosonics receivers incor­
porate a Battery Timer function which tracks the amount
of time the transmitter signal is detected (See your
receiver manual to determine if this function is avail­
able.) By using the receiver’s battery timer and replac­
ing the transmitter battery before the premeasured time
is up, users can minimize potential loss of audio when
NiMH batteries are used.
Frequency Select Switches
Two 16-position rotary Frequency Select Switches,
accessed through the left side panel, are used to adjust
the transmitter’s operating frequency. These switches
are labeled 1.6M and 100K. The 1.6M switch is used
for coarse frequency adjustments and the 100K is used
for fine frequency adjustment.
Modulation LEDs
The Modulation LEDs provide a visual indication of the
input audio signal level from the microphone or musical
isntrument. These two bicolor LEDs can glow either red
or green to indicate modulation levels.
(LM Shown for illustrative purposes)
Belt Cip
Mic Input
Jack
AUDIO LEVEL
control
Modulation
LEDs
Power LED
Power
ON/OFF
Antenna
Frequency Select Belt Cip
Switches Attachment Holes
Battery Compartment Door
The Modulation LEDs are also used to indicate the
Compatibility Mode when the transmitter is initially
turned on. The Modulation LEDs will blink simulta­
neously:
• Once for 100 Series mode
• Two times for 200 Series mode
• Three times for mode 3
• Four times for Digital Hybrid Wireless
™
or 400 Series mode
• Five times for IFB mode
Audio Level
The AUDIO LEVEL control is used to set the level of the
transmitter’s input for the proper modulation.
Antenna
The flexible, insulated galvanized steel cable antenna
supplied with the transmitter is cut to 1/4 wavelength of
the center of the frequency block (the frequency range)
of the transmitter.
Belt Clip
The belt clip may be removed for special applications by
pulling the ends out of the holes in the sides of the
case. An optional hinged belt clip (P/N BCHINGED) is
also available. Contact a Lectrosonics sales represen­
tative, or visit our web site (www.lectrosonics.com) for
more details.
LECTROSONICS, INC. 6