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Alarm conditions must first be set-up as described in the re-
mainder of this section. Following that, the email/SMS messag-
ing and rear-panel GPO tallies may be programmed. These pro-
cedures will be described in the
Setup
and
Webpage dis-
cussions, respectively.
NOTE:
Do please read the following discussions in their entire-
ty. A setup explained for one alarm that is common (or quite
similar) to the setup of others may not be explained in full de-
tail a second time.
Audio Loss
Alarm: On
simply ‘arms’ the function in this and all similar in-
stances. If the alarm is turned
Off
, there will be no front-panel
AUDIO LOSS
LED or corresponding indicator on the Web inter-
face
Now Playing
or
Alarm
Web interface pages. There will be no
closure at a rear-panel GPO terminal, nor will the SOFIA 568
send SMS/text or Email alerts to station personnel or log the
alarm. This applies to all alarms.
Level (dB):
displays the audio metering level of the off-air pro-
gram being received. This is ‘grayed-out’ because there is no
adjustment in this case; the audio level is shown to make alarm
setup easier.
Threshold On (dB):
is the set point that the program must drop
below to trigger an alarm. Moreover, the program level must
remain below this set point for the number of seconds pro-
grammed by the
Time On (Sec):
slider. For the alarm to reset,
the program level must re-attain a specified
Threshold Off (dB):
value and remain above
that point for the num-
ber of seconds set by the
Time Off (Sec):
slider.
In this example, the pro-
gram must fall below
–25dB for a full 60 sec-
onds to trigger an alarm.
Then when the program
returns, it must stay
above –20dB for 30 sec-
onds for the alarm to re-
set.
Low Signal
This alarm is similar to one just discussed for audio loss.
When
Mute:
is turned
On
, program audio at all outputs is
‘squelched’ (silenced) during the alarm interval. When receiving
analog FM, this keeps ‘interstation hiss’ from making a nui-
sance of itself or, for HD Radio programs, ensures that audio is
not heard as an intermittent staccato as it comes and goes with
signal strength at the hairy edge of HD Radio decoding.
The
RSSI (dBuV):
grayed-out bargraph gives the level of the in-
coming RF carrier.
Threshold On (dBuV):
and
Threshold Off
Summary of Contents for HD Radio SiteStreamer+ SOFIA 568
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