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In my experience with these boards, the issues are usually around the edges of where the runners used to be - sometimes even a fair ways away from the edges. I don't know the chemistry of what's going

Martin, if the trace is still noisy, whether or not you activate the CW filter on your 83522A, the circuit involved in this filter is very simple: on the A6 module, it is a U22 driver, a K1 relay and

It may be more complicated than it looks on the surface. The plated through holes are often not what you'd think, being more delicate than not. To visualize this, think a ham sandwich (just because)

Using the microscope took some pictures. PCB 0 <https://flic.kr/p/2pgNMqz> PCB 1 <https://flic.kr/p/2pgLtMJ> PCB 2 <https://flic.kr/p/2pgLtMD> PCB 3 <https://flic.kr/p/2pgLtMZ> PCB 4

Martin, I'm back... My 8350B, on which I was testing, suddenly broke down, when it was turned back on, it was working 30 seconds earlier...what a coincidence! But, it wasn't too complicated: a

I made a simple test case circuit board and connectors in 2012 and sold 240 of them with no complaints -- the 7k_flex_extender kit. I have a couple of 3400As and might do a free published chopper

Amen Brother, I am with you, wholeheartedly agree! I have been spoiled by having synthesizers available! Poignant story from my younger days: Microwave synthesizers were ABSOLUTELY beyond my reach in

I'm probably spoiled by these synthesised generators. When I was at school, many years ago, I build a generator myself. Certainly horrible performance, but I did not have any tools to measure that.

What is interesting to me is the expectation of greater accuracy than was possible. Essentially, the display LEDs on an 8350B are part of a Voltmeter, not a FREQUENCY COUNTER. 5 MHz at 10 GHz is .05%

Martin, You wrote: "The microwave module is even worse, at 10GHz its off by 5MHz with no CAL as the other modules have." The frequency accuracy maybe off by 5MHz, in CW mode, the tolerance is ±20MHz.

Hi, my 8510C comes up in factory preset state upon power-up. How can I make the unit come up in a user predefined state? Modifying the user preset state apparently isn't sufficient. The color scheme

The 8517 manual answers question 2. The b-channels have a low frequency cut-off. So, that's normal. I'll ask the other question in a separate thread. Tom

At LSSM, failed DIP switches are the #2 failure that we have to deal with on half-century-old computers, second only to small electrolytic capacitors. We nearly always just replace them. -Dave -- Dave

The battery is the first place I go on getting a new 8350. I have scrapped too many to risk losing a good one. The other possibility is the dip switches on the plugin and the adapter. They are not

Hi Yves, here are my results. 1) HP 83522A set as yours, also about the same parameters on my SA. The trace is similar, but much noisier than yours. 2) Hp 86222B (same frequency range) plugged in with

Hi folks, problem solved. Previously, I only checked the GPIB addresses of present instruments. I have now set the GPIB addresses of not-connected units (like the second source which I don't have) to

Yeah, I have heard of the battery issue, thats why I removed the battery altogether... :-) No problem from that side! cheers Martin

The 8350B sweeper has a nicad battery (BT1), ...borrowed from the HP35 calculator family... mounted on the inside panel of the sweeper plugin compartment. By design, it gets trickle charged to death.

The board set is visible if you click on completed auctions. John KK6IL

The original boards with edge connectors were nickel or gold plated, the ones I saw on ebay looked to be HASL, this could be a problem with the gold edge connector sockets, a warning from an ex-HP