[Flexradio] Panadpator and S Meter Calibration

[Ray Andrews, K9DUR]

Glenn,

Somebody may shoot me down on this explanation, but I believe the reason is:
The S-meter is measuring the noise power in the entire passband of the
receive filter (a big bucket), whereas the panadapter is displaying the
noise level at each discrete frequency (a bunch of little buckets).  If you
add all the little buckets within the filter passband together, the total
should equal the amount in the big bucket.  You can demonstrate this by
changing the filter width.  I just set my FLEX-5000A to 40m CW into a dummy
load.  With a filter width of 1 kHz, the S-meter reads -120dBm while the
average signal level on the panadapter display is about -135dBm.  If I
change the filter width to 25 Hz, the S-meter reading drops to -128dBm while
the panadapter level stays the same.

No, you do not need to recalibrate anything.

73, Ray, K9DUR
http://k9dur.info