Listen LR-100 Series, User Manual

Page: 11 / 32

7
Operating Instructions Operating
Instructions
Quick Reference
Antenna
Power
Output
Aux
Battery Control
RX Only
RX +
AUX
RX or
AUX
Line
Mic
Speak
er
12VDC
Gr
ound
Up
Do
w
n
Mut
e
C
ommon
+ +
-
Audio Output
Auxiliary Input
SPEAKER SELECTION SWITCH:
This selects the audio being
routed to the speaker
amplifier to either the OUTPUT
or AUXILIARY audio.
Connect provided
power supply here.
OPTIONAL 12V POWER: Connect
optional battery or +12VDC source
here. The battery can be recharged; see
page 8.
CONTROL: Remote
control of UP, DOWN
and MUTE functions.
All functions are
momentary closures
to common.
UNBALANCED OUTPUT:
Phono, -10dBu nominal.
AUDIO OUTPUT SELECTION:
For RECEIVE audio only, select RX ONLY;
For RECEIVE audio mixed with
AUXILIARY audio, select RX + AUX;
For RECEIVE audio when not squelched
and AUXILIARY audio when squelched,
select RX or AUX.
SPEAKER CONNECTION:
Connect a 4 ohm (or
greater) loudspeaker here.
ANTENNA CONNECTION:
Attach supplied 90 degree
helical antenna or optional
remote antenna here. Uses
standard 50 ohm BNC
connector.
BALANCED OUTPUT:
Male XLR, 0 or
-40dBu nominal.
Unbalanced AUXILIARY
input: phono, -10dBu
nominal.
BALANCED AUXILIARY INPUT:
Combination Female XLR - ¼ in
connector; 0dBu nominal.
MIC/LINE LEVEL SWITCH:
Reduces the balanced
OUTPUT audio gain by
40dB in Mic mode.
Two internal
2 amp, fast
blow fuses
LR-100 Quick Reference (cont.)
LR-100 Rear Panel