BATTERY LOADING
Use LR6 type alkaline battery.
1. Hold the microphone body and rotate the micro-
phone grip anticlockwise. (Fig. 1) The microphone
grip is so designed that it can not be completely
removed from the body because the battery grip
past the lock point as damage may occur. (Fig. 2)
Microphone head
Body
Grip
Fig. 1
2. Observing correct polarity instructed inside the
battery compartment, insert a battery. (Fig. 2)
Fig. 2
Name plate
(Color identification label)
3. Replace the microphone grip by sliding the grip
upward and hand tightening the grip in a clockwise
position.
BATTERY REPLACEMENT
1. The alkaline battery LR6 can be continuously used
for approximately 12 hours. (The manganese
battery R6 for approximately four hours.)
2. Battery indicator
When the battey voltage is sufficient, the green
LED lights. The green LED becomes dimmer as
the battery voltage drops, and the red LED lights.
In such a case, renew the alkaline battery LR6
inside an hour or two (renew the manganese
battery R6 inside a half hour.).
Red LED
Green LED
Fig. 3
HOW TO USE
1. Verify that the receiver frequency is identical with
the microphone (transmitter) frequency.
2. Set the microphone on/off switch to ON, and verify
that the green battery indicator lights.
3. Set the on/off switch to OFF after use and verify
that the green LED is extinguished.
SENSITIVITY SETTING
The maximum input sensitivity of this microphone can
be set in the range of from 128 dBspl to 144 dBspl.
(Factory-preset to 136 dBspl.) If the user's mouth is
put exteremely close to the microphone, and speaking
loud into the microphone, the amplifier is overloaded,
thus resulting in sound distortion. Conversely, if used
away from the microphone, the sufficient S/N ratio
may not be obtained due to low-level sound pickup.
In such cases, observing the receiver's level meter,
adjust the microphone gain control as follows:
1. Set the receiver's power switch to ON. Then set
the microphone's power switch to ON and confirm
that the receiver receives a radio signal.
2. Use a Philips type screwdriver to adjust the gain
control, as shown in Fig, 4. Rotate the control
clockwise to increase the sensitivity, and counter-
clockwise to decrease it.
3. Speaking loud into the microphone, adjust the gain
control that the level indicator lights yellow. There
is no fear of sound distortion if the indicator lights
red just occasionally.
Fig. 4
4. If the receiver to be used is the WT-780 or WT-781,
of which level indicator only indicates a peak level,
similarly adjust the gain control so that the peak
indicator lights just occasionally when the voice
input is at its maximum.
