Inovonics 525N, Инструкция по установке и эксплуатации

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Alarm ON/OFF
Timing
Next, using the
SEL
buttons, move the blinking brackets to
highlight the
ON:
value,
60SEC
in our example here.
MENU
buttons then can set this figure to the delay you want to build
into the alarm, the delay between a carrier drop and the actual
alarm activation. This time may be set in one-second incre-
ments between
1SEC
and
120SEC
(two minutes).
You might wonder, “Why not make this alarm instantaneous?”
After all, you want to know immediately when the station
leaves the air, right? Keep in mind that text-message or email
notifications may optionally be sent simultaneously with this
alarm, and without a delay you might receive an Inbox-full of
notifications when you are really experiencing just momentary
‘hits’ in off-air reception. This alarm is activated when the re-
ceived carrier falls below the
TRIP LEVEL:
and remains below
that point beyond the
ON:
interval.
In like manner you set the alarm’s reset, or
OFF:
time. This de-
lay guards against ‘false positives’ and a raft of messages while
the transmitter tries to cycle itself back into operation.
OFF:
simply means that the carrier must return to a point above the
TRIP LEVEL:
and stay there for the duration of the
OFF:
time
before the alarm is reset.
Settings here pertain to the station that is normally monitored
and are probably not the right settings for other stations when
the 525N is used to monitor market companions. When surf-
ing the band or “DXing,” it may be necessary to temporarily re-
set alarms to absurd values to keep them from activating un-
necessarily. Remember to restore the proper setting afterward.
SETTING THE PROGRAM AUDIO LOSS ALARM
An audio-loss also triggers a front-panel alarm, a rear-panel tal-
ly output, and can dispatch email or text messages when carri-
er modulation falls below a specified level for a given period.
SET AUDIO LOSS
uses almost the same setup procedure that
was just outlined for the
SET LOW SIGNAL
procedure, so it will
not be repeated in detail here. Please refer to the previous dis-
cussion.
SEL
and
MENU/EDIT
buttons set the
TRIP LEVEL:
and
ON:
and
OFF:
intervals. The only difference is that instead
of setting a carrier trip point in dBuV, you are setting an audio
level in percent-modulation.