Quote:
Originally Posted by rabbit73
There appears to be spurs in all three of my scanners, but it's not unexpected in equipment that isn't lab grade. ...
|
Yes.
Quote:
The RTL-SDR dongle has a lot of spurs ...
|
Have noticed that in the low cost RTL devices. Most of the time not a problem if one is aware of their presence.
Quote:
...I think the Spectrum Spy scanner for the R2 is a lot cleaner than the RSP Spectrum Analyzer for the RSP1A...
|
Interesting.
Quote:
..The dB scales on my three SDRs are relative, not absolute.
|
Yes, the unit of dB itself is relative.
When uses as dBm or dB(other), then it takes on more absolute meaning.
-------------------
Curious about scale accuracy, sorta related to scale linearity:
Is a dB indicated, an actual dB.
For example:
Is a -20dB indication really 10dB less than a -10dB indication? Or,
Is the delta, 9 or 11 dB or some other number.
-------------------
Quote:
...I think there are offset adjustments for the relative scale,...
....I don't think the relative scales of either one could be considered "accurate" with so many stages in series.
|
Thanks for the information and the images, helps to better understand these interesting devices.
.