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Mark, This would mean that my AYX card probably has a problem. I'll look into it further. Thank You. Yves De : [email protected] <[email protected]> De la

Hi Yves, I'd have to move a bunch of stuff around to do this properly so I rigged up something with my HP8350 sweeper (set to CW) and a 10kHz signal applied to the EXT FM input... I can see

Hi Mark, I used a 10 kHz to 182 MHz FM signal here. I put myself in zero span, and the sweep time at 4msec. You can see the modulating signal, because I shifted the frequency of the E4407B to do slope

Yves, My unit has this option, apparently no license required. I can set the sweep time to 20us but I am not sure what test you are doing. Are you saying that 20us sweep time is NOT displayed on the

Hi, I was lucky enough to find an E4407B, it was defective but I managed to repair it. Currently, I'm doing performance tests to see if everything is working properly. I am at the stage where I have

Some people would dearly love the nixies, if nothing else.? 2N404 are extremely old, but perhaps someone, somewhere, might like to restore it. Not surprised about Nightfire.? Turns out that you can

After zooming in quite a bit I see that the counter modules are powered by -15 and +20V rails. They use 2N404 Germanium transistors. My HP5233 counter appears to use identical boards.It is basically

KI found a clue in the circuit description, par. 4-195, " A lighted photo conductor has a resistance of about 20k ohms, & an unlighted element has a resistance of several megohms." Sounds like a CDS

I believe some of the 2-20GHz had about 1 ampere tuning current at 20GHz…

74 series logic is standard TTL, so 0 to 0.6 volts is a good logic zero, and anything above 2.4 volts (preferably 3.2 to back bias an internal diode) is a logic one.? IIRC, 7447 outputs are simply

What about the 7441/74LS41 BCD to decimal decoder designed to drive Nixies? I have a 312B, which uses LED displays, with a much simpler counter design.which uses the 74LS75 Latch and the 74L47 BCD to

Anyone happen to have those files? I have the disassemblers for HPIB and other stuff, but not HP1000. Docs for the two breakout boards would be nice as well!

I had been seeing some phase jumps from my DMTD and after swapping out both the DMTD and the 7350A, I had come to the conclusion that it was probably the 3335A.? I had started another 24 hour run,

Brad, If I can recall the neon-photocell approach was very similar to that used in the HP 5245L counter series display boards. If you can find an old board (base P/N 05212-6016) you might have some

Don - Thanks - that is what I thought. Cheers! Bruce Quoting "Don Bitters via groups.io" <donbitters@...>:

It used to be that devices with RS-232 had negative supplies available, and +-12V were common levels seen. Later people started using transceiver chips and a 7660 or similar capacitor charge pump to

Guys I have a HP 8656B that has a lot digit on the display that remains on all the time. Example: 10.000 MHz reads ? ? ?.10.000 MHZ not sure if it may be a stuck something? Andrew

Hi all Regarding Yig information and a X reference look in the Yig folder on this site /g/HP-Agilent-Keysight-equipment/files/YIG%20%20folder

Hello again Candrian. Sadly I do not know enough about those hardware options, to say for sure.? But if I had to recommend anything, I'd go for the HPIB(GPIB) interface designed for that analyser, if

Most of your assumptions are true, but if the end point voltages are not reasonably close you won’t see output at either end. You might find that if you supplied a tuning voltage to the YIG