The USB stuff has no front end and stability and calibration is highly questionable.. How can you discriminate between mixes within the USB device and the signal of interest?
I will take my 141T or my 8566 over USB every time.
Rather lug a little weight around and know what I am seeing on the display is what is really out there. There is a reason that usable SAs have weight to them and USB devices do not.

Glenn


On 4/8/2018 6:58 PM, Andy ZL3AG via time-nuts wrote:
On 9/04/2018, at 3:52 AM, jimlux wrote:

Test equipment tends to be aged - Unless you have a particular need for a HP 
600 series microwave signal generator, there are probably better sources 
available much cheaper that use more modern components. In this day and age, I 
don't think people should suffer through 141T spectrum analyzers or even a 
8568- Spend your money an a nice USB unit instead.

Blasphemy!


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Glenn Little                ARRL Technical Specialist   QCWA  LM 28417
Amateur Callsign:  WB4UIV            wb4...@arrl.net    AMSAT LM 2178
QTH:  Goose Creek, SC USA (EM92xx)  USSVI LM   NRA LM   SBE ARRL TAPR
"It is not the class of license that the Amateur holds but the class
of the Amateur that holds the license"

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