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Hi Tom – I admire your restraint and diplomatic prowess. I do not think I would be able to come close to your exemplar demeanor. Knowing not only this group, but many others, there are always

These things have o-rings to replace? I didn't know! I just ordered a fistful of silicone o-rings from 'The O-Ring Store' for the attenuators in my 8648C sig gens, plus a bunch extras for future use.

Hello Bo, I think you are confronting two non-technical problems, in addition to the technical one regarding the connector. My guess is that Keysight is trying to deal with regulations regarding EU

I suppose almost anything is possible, but it's hard to see how a few microamps of forward current could cause an increase in reverse leakage current. Knowing this group, however, someone will chime

I agree. I'm not an 'expert' but 'experts' maybe don't know what really goes on at a fab (or what prayers the engineers say, during the fabrication process.) Maybe materials are 'better' and 'clean

Hi guys, Good points here. What happens when you place a cap with zero ESR at the output of a linear power supply is that you intrude on the phase margin and the loop becomes unstable. This can easily

[email protected]> wrote: You work a

Hi group, I tried asking Keysight support for possibility to repair or buy spare parts for a HP E4413A 26.5 GHz power sensor and giving the serial number and my full name. The sensor works fine, but

Excellent answers, thanks all.

To amplify your comment, many times older linear supplies, when they are brute force recapped, with the best, long life, low esr caps you can find, will become beacons of chaotic oscillation. I put a

Thanks, Dave B. "To slug" = "to make sluggish". Thought so. Still, I still have never heard the term in 50-plus years of electronics work, including college courses in control system theory. The base

Is this failure is related to having a few uA running through the metal junction for decades? Personally, if it took 30+ years to get so leaky, then I would still replace it with a new schottky - and

The question is about substituting? a long life, low leakage 3.6V Li+ Solder Tab, 10+ year battery ( Such as Tadiran or SAFT LSH-14 cell ) .... of at least 1200 mAh to 1600mAh capacity, instead of

Hi all Yeas its a very nice tool.Mine came with https://www.hpmemoryproject.org/an/pdf/an_183.pdf High Frequency Swept Measurements. Hardy Fra: [email protected]

Very good! This what I was getting at.? I have a little slide rule from HP that does the 20 LOG(1+rho1*rho2)^2? for the mismatch. Nice calculation tool. Helps when relating VSWR effects to amplitude

If it helps to add some numbers to all this then consider the case up around 22GHz where the sig gen source VSWR might be 1.8:1 typical. This is poor enough to add significant mismatch uncertainty

Hi. It's just a generic term (damping is another) to slow down the response of a loop, to prevent it going unstable. Not an uncommon issue in some linear PSU's like those -12.6V or -100V regulator

I fully agree. Subbing a 10dB attn sounds like a plan to me. Unfortunately I don't have time this week, but perhaps next I'll give it a go. At any rate, it's clearly the first thing I should try.

Jack and Bruce - many thanks. It all helps to work out what's happening. I only posted a photo of what I saw with the default calibration where the SA is automatically set at 10dB. It's the exact same

In my experience, and this is across many decades of using all kinds of lab sig gens, the signal generators that use a classic levelling loop do not give an infinitely low generator VSWR up at high RF