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FRONT PANEL CONTROLS
5 | 820iR User Manual
820iR User Manual | 14
8 2 0 i R U s e r M a n u a l
8 2 0 i R U s e r M a n u a l
1. POWER Switch/POWER Indicator:
This switch is used to turn the
820iR ON (switch up), or OFF
(switch down). When the POWER
switch is in the ON position, the
red POWER light will glow.
2. IR Indicators (IR): These lights will
glow red when the corresponding
microphone is turned on. This light
confirms the 820iR is receiving the
infrared signal.
3. AF Indicators (AF): These lights
flash green when audio (voice)
from the microphone is detected.
4. A VOLUME: Controls the volume
level of the teacher microphone
that is switched to Channel A.
Rotating the knob clockwise
increases output level.
5. B VOLUME: Controls the volume
level of the optional second
microphone that is switched to
Channel B. Rotating the knob
clockwise increases output level.
6. AUDIO INPUT VOLUME:
• TV/VCR: Controls the volume of
a TV/VCR connected to the
TV/VCR INPUT.
• CD/DVD: Controls the volume
of a CD/DVD player connected
to the CD/DVD INPUT.
7. ASSISTIVE LISTENING VOLUME:
Controls the volume level of an
assistive listening device.
POWER
A VOLUME
B VOLUME
TV/VCR
CD/DVD
ASSISTIVE LISTENING
IR
IR
AF
AF
WIRELESS MICROPHONE VOLUME
AUDIO INPUT VOLUME
ALD VOLUME
LES 820iR Classroom Amplification System
1
4
5
6
2
7
3
POWER
A VOLUME
B VOLUME
TV/VCR
CD/DVD
ASSISTIVE LISTENING
IR
IR
AF
AF
WIRELESS MICROPHONE VOLUME
AUDIO INPUT VOLUME
ALD VOLUME
LES 820iR Classroom Amplification System
OPERATING THE OPTIONAL HM-70 HANDHELD MIC
ON
OFF
MUTE
(Center Position)
3. Grip the barrel of the HM-70 in the
center section just below the power
switch. Avoid gripping the HM-70
around the bottom, covering the
infrared emitters circling the base.
This could interrupt signal trans-
mission from the microphone to
the receiver.
4. Speak directly into the microphone
at a normal level. Slowly increase
the B VOLUME until you can just
hear your voice.
5. Slide the switch to the OFF position
to turn off the HM-70. (Make sure the
power indicator light is off.)
The Channel A/B switch is located
inside the battery compartment.
The switch is set to Channel B at
the factory.
1. Slide the power switch on the side
of the HM-70 all the way up. The
power indicator LED will glow red
and stay on.
2. The center position of the power
switch is MUTE. When in this mode,
the HM-70 is transmitting a signal,
but no audio can be heard through
the system. This is useful if you
wish to temporarily turn audio off
during a private conversation.