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Trying to compare generators with all the variables that affect PN can drive you crazy, but would be worthwhile. I did tests on a bunch of PTS synthesizers and one of them included a comparison of

Very interesting John. Actually, I am surprised as to how good it is. Although, since the OCXO is also at 10 MHz, it would be more interesting to see it at some random frequency. Maybe as compared to

Hi John, Thanks for that, very enlightening! Raymond

I should qualify that -- dramatic improvement at low offsets. More than about 10 Hz from the carrier, the results were the same with either reference.

Several years ago I did phase noise measurements on a 3325B. The results are here: https://febo.com/pages/hp3325b/ The unit had the standard (not high-stability) oscillator and my measurements showed

Hi Szabolcs, Only now it occurs to me that Option 001 is only exactly like the Options 001 in so many HP instruments: High Stability Oscillator (OCXO)! Until now I thought that it (also) contained

Just as a slight follow-up, it occurred to me that if this pot does go bad, I can replace the plastic resistive component as well as the wiper with parts from a NEW or NOS pot from the same series

Hi, Sorry if it is know, but it is new to me. While fixing the LED in one of the keys of my 5335A, I have stumbled upon some interesting thing. All keys have LEDs in them, even those where the keycap

They are both “EMI Measurement Procedure”, but have different subtitles. See http://hpmemoryproject.org/ressources/resrc_an_02.htm DaveD

Hi, Yes, I somehow expected that without the OCXO option there isn't much point in specifying phase noise. At least it wouldn't be any stellar value anyway. The good news is that you can feed it any

Hi, I have AN142 which goes by the same name. Are you sure about the number? Richard

Hi Colin Having checked the Agilent specifications for a 8920A RF power meter accuracy is plus or minus 10% of reading. Spectrum analyser is plus or minus 2.5dB. Looks like your 8920A is almost in

Hi Jan, The semi-rigid is standard .141 with precision stainless steel SMA connectors. It is L-shaped with a bit of an offset in the leg that goes to the front panel connector: Please note that the

Gem! Thank you. Colin

Hi Szabolcs, Thanks for your reaction and pointer. I have been able to download the 3325B service manual you refer to, from the Agilent website, no problem... At least now I've got some numbers re.

you should be ble to save the instrument state with the label "POWERON" to restore that atuomatically

Temporary fix All, Based on some thoughts delivered by this thread I have found a temporary fix, but it is really only that: - Set SA working - Inject known power into Ant port - Set to 1dB/div and

I second that. The Marconi 2945 service monitor is some 25 years old but very good. It has served me well over the years. Jos PA0AMX

Hi, There is a version of the 3325B service manual, which has some service notes and other documents inside. It used to be available at Keysight's web page, I can't find it now there, but I have it

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