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Hi,



Like you, I was tempted by this spectrum.

So, I've only owned an 8562A for a few months, which I was able to repair, align and calibrate. It wasn't easy, but in the end, it was worth it.



Just like the 8590 series, you can do some automatic alignments (AMPLITUDE + MORE... menu, instead of the CAL menu for the 8590 series).



But I also have an 8595E, so I can compare the two up to 6.5GHz.

Obviously the 8595E is a newer, faster version and offers some interesting features, but I would say that the 8560A series is a high-performance series compared to the 8590A series which is more low-cost...if you can call it that ?.



Now how to know if it works well, there it is more difficult by looking at only one picture:



- the reference at 300 MHz is at -10dBm (it gives a good idea for the 0 band)

- If there are other measurements up to 26.5 GHz, it's easier to judge, otherwise as in my case, there were 4 noise bands (for bands 1-4, i.e., from 2.75-22GHz), and the noise was flat for the 4 levels...this was a bad sign.

But the cause was in this case, simply a YTO-YTM alignment and a non-existent flatness calibration. So, nothing was damaged, just an alignment...which requires a generator up to 26.5GHz.

- A picture showing a narrow resbw can give an indication of the frequency stability.



When I got my 8562A, its condition was very degraded, the screen display very distorted.

But in the end, it only cost me a dozen potentiometers and a complete alignment...and many hours.

A friend lent me his 8562A, which made my life easier because I could make comparisons.



Now, instinctively, I am always inclined to use my 8562A rather than my 8595E.



if you have specific questions about the 8562A, I can try to answer them.





Regards

Yves





De : [email protected] <[email protected]> De la part de RubenRubio
Envoyé : 9 mars 2022 09:27
? : [email protected]
Objet : [HP-Agilent-Keysight-equipment] 8562A SA buying



Hi there, mates!

I am thinking on buy a 8562A for my lab and I ask for advice. It has option 026, so 9 kHz to 26.5 GHz. Is this a good unit in general terms?

I wonder how can I see the unit is ok in a few steps at the time of check it for buy.

My 8590L has a CAL key in front panel and makes an auto calibration procedure using the 300 MHz built-in source, so itself can say 'hey, is all Ok'. But the 8562A has no CAL key. I review the manual and don't found that 'autocalibration' function. Maybe is easier than I think, but you maybe can tell me how to do that.

At the moment I don't know about more options installed or modules in the back. I observed that these old units has modules with different options instaled in the back. My 8590L doesn't have that kind of module or dock for it, ninety models are newer versions that doesn't need external memory? Maybe those modules are hackeable to get more functions...

All pieces of advice or recommendations are welcome.

Best regards,
Ruben