Ritron AIERIT27-150, Руководство пользователя, Страница: 57 / 61

4.7
LPA-Series Options
Certain LPA-Series options affect operation as follows:
Pre-Announce Tone
With this feature enabled the LPA receiver will sound a short tone prior to each broadcast to notify listeners that
a page is forthcoming.
Section 4
Operation 22
4.8
How to Minimize Feedback
iver
tended to be used in the same area as the calling radio, steps can be taken to minimize the feedback
ffect.
R
o not set the LPA receiver volume any high than is necessary to clearly hear the PA messages.
M
or
The necessary distance increases if the volume is turned up and decreases if the volume is
rned down.
M
nting directly into the microphone. Using your hand to shield the microphone
an also reduce feedback.
U
quip your calling radio with an optional noise-canceling microphone.
Feedback is the result of the PA system speaker audio getting back into the microphone of the radio being used to
access the LPA receiver. This is a problem with the calling radio, not the LPA receiver. Although the LPA rece
is not in
e
educe LPA receiver speaker volume
D
aintain distance between the calling radio and the PA system speakers
In general, the calling radio should be at least 50 feet away from the speaker when the LPA receiver is set f
50% volume.
tu
ake sure the radio microphone is turned away from the speaker
You do not want the speaker poi
c
se a noise canceling microphone
E
Record and Play feature eliminates feedback
The Record and Play feature completely eliminates feedback by recording your
message and playing it back immediately after you have finished sending it to the
LPA receiver. See page 18 to enable the Record and Play operation.
The calling radio is not transmitting while the message is broadcast, so speaker
audio cannot get into the calling radio microphone.