— 22 —
The upper graph shows Left and Right program channel levels
over the selected time period. These levels reflect the unit’s
peak-weighted metering, and although they do not represent
true loudness, one can get a pretty good idea of program audio
density from this plot.
The lower graph plots signal metrics over time. The display de-
faults to a display of all four parameters available, although the
Show:
buttons allow for selective presentation. Y-axis resolu-
tion increases as display choices are reduced.
Obviously, the histograms represent only the station being re-
ceived at the moment. If you change frequency to check on
other stations in the market, the histograms will reflect param-
eters of those stations during your surfing expedition. You
might want to jot-down the time away from the primary station
target if the histograms will be used for later analysis.
The
BandScanner™
Utility
The BandScanner utility of the SOFIA 568 is a simple, annotated
RF spectrum analyzer. It displays the entire FM band when
Step Size:
is set to the default
200kHz
, regardless of the
Center
Frequency (MHz):
setting.
Center Frequency (MHz):
and
Step Size
:
may be selectively adjusted to zero-in on a frequency range of
interest.
NOTE:
The band-scanning function mutes the receiver audio
during the scan cycle and will put a glitch in the histograms as
it essentially tunes across the band and downloads data from,
each station in the market. This is another of the implications
alluded-to earlier with respect to metering, histograms and FM
band-surfing.
There are three scanning modes, or
Scan Type:
selections. The
SOFIA 568 can scan the band and display only the
RSSI
level;
this is the quickest scan. It can also scan and display both the
RSSI + RDS
information, which takes a bit longer, or it can scan
and display
RSSI + RDS + HD
information which is effectively a
double-scan of the band.
This is an entire FM-band plot of the busy Los Angeles FM mar-
ket, scanned in the
RSSI + RDS + HD
mode.
Summary of Contents for HD Radio SiteStreamer+ SOFIA 568
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