On Tue,9/1/2015 10:00 AM, Bob McGraw - K4TAX wrote:
For a decent Spectrum Analyzer, 9kHz to 1.5 GHz with tracking
generator, check out the Rigol DSA 815-TG.
Hi Bob,
I've got one of these, in addition to a vintage HP 8590D. Specs are
similar, the HP is a bit better, but not a lot. Both are blown away by
some of the best of SDRs, including the K3 with P3/SVGA. While the
P3/SVGA can display only 80 dB, the front end is good for about 100 dB,
the display can be scaled up to view down to that level. Not as good as
the Rigol or HP, but P3/SVGA frequency resolution can go down to 1 Hz
(2048 point FFT for a 2 kHz span), two orders of magnitude better than
the Rigol or HP. Rigol phase noise is specified as -80dBc/Hz at 10 kHz;
the original K3 (with original synth board) was measured by ARRL as
-140dBc/Hz.
Bottom line -- the Rigol and HP are fine for looking at harmonics and
spurs, but useless for looking at occupied bandwidth. Take a look at the
plots in this link, especially slide #8, K3 steady carrier at 25W. I
can't do this with my Rigol or my HP!
http://k9yc.com/P3_Spectrum_Measurements.pdf
73, Jim K9YC
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