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Agreed that the EEVBlog forums are more active with this sort of thing. As you have already guessed, I wanted to post here since this group is "dedicated" to HP/Agilent/Keysight stuff. I will

"pianovt via groups.io" <pianovt@...> writes: My mistake Vladan. I misunderstood your point then - I thought you were essentially saying that an amplitude inaccuracy would also affect

Hi Matt, I actually asked something different from what you measured. You measured the relative level between the displayed signal and average noise. My question is, when you applied -10dBm to each

"pianovt via groups.io" <pianovt@...> writes: I made some measurements to compare them. I injected a -10 dBm tone from my 8340 at each of the following frequencies. I centered the 8566

Actually there is ONE analyzer that HP made that used fundamental mixer up to 22GHz ! Sent: Monday, June 6, 2022 11:46 PM To: [email protected] Subject: Re:

Is the amplitude accuracy on your 8566A good? Comparing noise levels between the two analyzers only makes sense if they both show correct amplitude when you apply a signal. Vladan

Dave’s explanation is correct and concise; I can add some detail for those who are interested, or not familiar. The first converter in the 8566 is a single diode mixer. A single diode is the

As I remember, the last converter only affects Band 0. Cheers! Bruce Quoting Matt Huszagh <huszaghmatt@...>:

Forgot to attach...

"pianovt via groups.io" <pianovt@...> writes: Thanks for sending that along Vladan. My unit appears to be a bit worse than that, but not wildly different. Have you noticed an

"Lothar baier" <Lothar@...> writes:

Matt, here is what a typical 8566B does. This unit is average, i.e. not particularly "hot", nor has it been calibrated recently. Vladan

higher conversion loss of the mixer translates into a increase in system noise figure , since there is no gain prior to the mixer the IF gain will also play into it , you can go online and find a

a spectrum analyzer in essence a receiver therefore the noise floor is determined by several factors , system Noise figure , System bandwidth and noise contribution ( phase noise ) from local

"Samudra" <samudra.haque@...> writes: Will do Samudra. FYI the "stepped" nature of the noise floor is expected and present in all 8566's. It occurs because the gain is stepped up about 6 dB for

These analyzers use several bands to cover their operating frequency range. The stepped noise floor is due to the increased mixer conversion loss in the higher bands. The higher the band, the greater

Interesting. I saw the stepped noise floor also on the recently acquired 8566b I setup recently, and would like to know mire what you find out. It does look strange.

Has anyone noticed this before? I did not make any adjustments, the display raster seems to have moved further to the top the CRT all by itself. It doesn't appear to? wonder around that I can see.

Performance test 14 is the "Average Noise Level Test", which looks applicable and mentions the "Last Converter Adjustments". I'll give those a shot, but still curious to hear thoughts on this. Matt

I have 2 HP 8566's: an A and B unit. The noise floor on the A unit is noticeably better than the noise on the B unit. I've attached 2 images of my B unit corresponding to the 0-2.5 GHz and 2-22 GHz