Lectrosonics WM - Manual - Manual (Page 7)

Watertight Transmitter
Rio Rancho, NM 7
Battery Compartments
The battery compartments are a rugged, straight-
forward design with a recessed entry that captures
the O-ring on the cap. The spring contact on the cap
maintains solid contact on the battery regardless of its
exact length.
The O-rings should be kept clean and dry, and coated
with petroleum jelly on a regular basis. See page 11 for
more information on preventing corrosion.
Battery polarity is marked
on the rear cover
Unscrew battery caps to
insert batteries
About Batteries
The transmitter is powered by two AA batteries.
Lithium batteries are recommended for longest life,
which typically provides over 7.5 hours of operation at
room temperature with the output set to 250 mW. At 50
mW, the runtime is typically over 14 hours with lithium
batteries.
The PWR LED glows green when the battery is good.
The color changes to red at a mid-point of operating
life, and will continue to glow red until the battery gets
close to the end of its life. When the LED begins to
blink red, there are only a few minutes remaining.
The exact point at which the LED turns red will vary
with battery brand and condition, temperature and cur-
rent drain. The LED is simply a reminder intended to
catch your attention, not an exact indicator of remain-
ing time.
1.6
1.4
1.2
1.0
.8
2 4 6 8 Hours
V
oltage
Varies
Green Red Blink
Input Connector
The threaded WP watertight plug on the microphone
cable fits into a recessed jack on the top panel. The re-
cess in the opening retains the O-ring when the plug is
tightened. The Lectrosonics M152WP lavaliere micro-
phone is supplied with the WP plug already installed.
Other microphones can also be terminated with this
plug by following the instructions included with the WP
connector kits.
Treat O-ring with petroleum jelly before
connecting (see page 11)
Equivalent Input Circuit
Diagram
To Virtual Ground
Audio Amplifier
MIC
GND
+5 VDC
Servo Bias
+
To Limiter Control
200 Ohm 100 Ohm
(menu selectable)
Roll-off
332 Ohm
20k
closed for mic level
open for line level
(menu item)
0, 2, 4V
35, 50, 70, 100, 120, 150 Hz
30uF/10V
WM Equivalent
Input Circuit Wiring