— 23 —
Every FM carrier found is displayed as a vertical bar, the height
indicating the relative signal strength in dBµV per the annota-
tion to the left of the plot. Had this scan been done in the sim-
ple
RSSI:
mode, all stations would show up as yellow bars.
By ‘hovering’ over a yellow bar, the
Freq:
and
RSSI:
level are shown numerically in the pop-up,
as in the first example on the right.
A yellow bar with a red dot indicates that the
station carries RDS information. (The red dot
shows only when the
Scan Type:
is set to
RSSI +
RDS
or
RSSI + RDS + HD
.) Hovering over
the red dot will display
Freq:
and
RSSI:
,
plus the RDS
PI:
code and derived
Call:
let-
ters, plus the
PTY
, or programming format
of the station. This is exemplified in the
second example on the right.
Running a full
RSSI + RDS + HD
scan addi-
tionally shows the HD stations in the market as
blue bars, which are invariably topped with red
dots indicating RDS info as well. In the third ex-
ample here, hovering on the blue portion of the
bar brings up
Freq:
,
RSSI:
and
Cd/No:
(digital sig-
nal quality) stats, as well as which HD Radio
Pro-
grams:
(channels) are being broadcast, and the
short station
Name:
. To see RDS info for this station, just hover
over the red dot at the top of the bar.
Market stations with RDS are shown in an
RDS Stations:
list di-
rectly below the scan. These are listed in ascending frequency
along with their PI, callsign, PTY and RSSI values. Click on any
station’s frequency to immediately tune the SOFIA 568 to that
station and be taken to the Now Playing Web interface page.
The
HD Stations:
list is below the tabulation of
RDS Stations:
.
Again in ascending frequency, the information will include
which HD Radio programs are being transmitted, the station
name, the RSSI value, and the Cd/No figure denoting relative
quality of the digital signal.
The Cd/No notation is color-coded in this list. A value greater
than 57 that gives solid HD Radio reception will be green, an
orange number is ‘iffy,’ and a red one generally won’t play.
RDS INFO
As the menu title implies, this Web interface page is a compre-
hensive display of the RDS information accompanying analog-
FM transmissions and their programming. It isn’t within the
scope of this manual to introduce, define and describe RDS fea-
tures, data, formatting and grouping. For that the reader is di-
rected to the appropriate Standard for either the European RDS
or US RBDS RadioData housekeeping utility.
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