Inovonics INOmini 638 SiteStreamer, Инструкция по установке и эксплуатации

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The HD Radio exciter is gener-
ally
GPS Locked
, and its lati-
tude and longitude are dis-
played on the corresponding
line on this screen. That loca-
tion is actually a hyperlink, and
clicking on it will bring up
Google Maps and pinpoint the
exact transmitter site location.
TX Gain
is a dB-offset figure that accompanies the HD Radio
signal. The broadcaster can effectively fiddle with the audio
gain in the HD Radio receiver, perhaps to equalize perceived
loudness between FM and HD1 programs that are processed
differently. TX Blend Control is a command that inhibits a
consumer receiver from blending automatically between FM
and HD1. This is used in the HD Radio ‘Ballgame Mode,’
when diversity delay is removed from the analog FM audio
path.
Alarms and Notifications
This is an important aspect of the SiteStramer™ Web inter-
face and requires thoughtful setup.
The time-stamp feature for email notifications and the
Alarm Log depends on Internet time, plus the proper time
offset and relationship to DST. Correct time setup should
be confirmed before considering setup of this page com-
plete. Internet time setup is explained on Page 31.
SiteStreamer™ alarms tend to have similar threshold and
timing setup parameters. Thresholds have two points to
set, the first is the threshold below which an alarm will ini-
tiate, and then a second point that the measured value must
re-attain to reset the alarm. This implies hysteresis in the
alarm level settings, and prevents ‘chattering’ as a metered
value varies about one set point or the other. Usually the
two points will be set with only a small difference.
The other common alarm parameter is on and off timing. In
other words, how long the metered value must remain be-
low the lower threshold point before an alarm occurs, and
then how long it must remain above the higher, ‘reset’
threshold before the alarm is reset. These settings will de-
pend entirely on whether you want to be apprised of a
short-term loss, or if the condition has to remain for a
greater number of seconds before the alarm is triggered.
— 24 —
Both alarm criteria apply to the
Audio Loss
and
Low Signal
alarms.
The
Low Signal
alarm duplicates front-panel setup on Menu
Screen 2, but the Web interface adds a
Mute:
function that
silences the monitored audio during a low signal alarm
condition when
Mute:
is turned
On
. This is important when
monitoring an FM transmission, as the typical loud hissing
from an FM receiver in the absence of a carrier keeps the
Audio Loss
alarm from responding. Unless
Mute:
is turned
On
, an FM-mode
Audio Loss
alarm will be triggered only by
‘dead air’: an unmodulated carrier.
The
RDS Alarm
is triggered by either a missing RDS subcar-
rier (
RDS Loss: On
), or an incorrect PI code (
PI Error: On
). A
PI error occurs when the station is ‘hijacked,’ or a translator
receiver otherwise takes the notion to pull-in the wrong in-
coming frequency. Enter the proper hexadecimal value in
the
PI Code:
box and click:
Save PI Code
. The SiteStreamer™
will then initiate an alarm when the entered value differs
from the received PI code.
The
Pilot Loss
alarm simply responds to the 19kHz FM ste-
reo pilot. Should the stereo-gen drop the pilot for some
reason, this alarm will trigger. There are no level threshold
set points, but
Time On (Sec):
and
Time Off (Sec):
do apply.
Similarly,
HD Loss
has no threshold values; the HD carrier
pair is either there or it isn’t. Timing is programmable.
Email Notifications
lets you specify which staff member gets
which alarm message, and whether the notification is an
email or an SMS/text message. Before this can be set up,
you must first enter the recipients on the
Email Preferences
Web interface page. This is covered on Page 30.