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Hi all, I'm on the hunt for a verified working 8482A power sensor, shipped to Japan. If you can provide a few pictures of it in operation and are willing to sell it for a reasonable price, I'm

Here's some pictures of the original HP board that I found online: HP 53132-60003 PCB Top ( https://drive.google.com/file/d/1J42heNdRPS1HLB-nYkH_spUI71Q6yCM0/view?usp=drivesdk ) HP 53132-60003 PCB

It's pretty straight forward. https://ibis.org/touchstone_ver2.0/touchstone_ver2_0.pdf I take the four real/imaginary S-parameter data pairs, using the Smith plot data retrieved by HPIB and write the

Good point Tom. The schematics don't necessarily indicate the fine details of circuit structure (especially at HF) and operation. I guess there is no picture of the original HP board layout? If one is

I don't know what HP's original layout looks like, but here's one possibility for the doubled-up diode clamps: Note that they're not directly in parallel -- they're separated by other stuff. If that

Jared, as I recall, the modern replacement diodes you're using are quite a bit more stout than the originals HP used. The only reasons I can picture for the doubled-up ones by HP is first, at the

Hello again Group - I have an 8720C and would like to be able to extract s2p files. I do have a PC with GPIB, and also I have a plotter emulator which works great. But I need a way to extract the data

The diodes are there because that's what HP did. I would also like to know the exact reason they did that too. :) It seems to work, so I'm sure there's a good reason for that layout. The Coplanar

I use the cal kit manager to create the XML version of the cal kit. In my ' HP8753 Companion ( https://github.com/VK2BEA/HP8753-Companion/tree/main ) ' program for the 8753 I parse the XML and use the

wrote: My understanding is that it only works with NI or Agilent GPIB cards, but I have not verified that.

Hi all, I have just stumbled across the VNA cal kit manager software here on this

Why two sets of diodes before the prescaler? I would think that two diodes after the resistor should be enough. The pair after the amplifier have no limiting. Also agree with the comment about

Hi, One problem to solve, the next one will be a little more complicated, namely the timing board. For my part, I also ordered an RF relay which I received last week, and it works perfectly.

The MB510 should give more predictable results, having much more uniform frequency response than the UPB1506. If tweaking bias and input frequency response tricks just don't cut it even with the

Would it be a better layout if U1 and U2 were rotated to straighten out the traces?? No idea, but it's something that occurs just by looking at it. Harvey

And just for funsies, here's the latest layout, using the MB510-PF chip and HP designed bias network as per the HP original design. Let em know if there are any glaring errors.

My spectrum analyser is a Siglent SVA1032X, good for 3.2 GHz. I'll have to get a down converter for my scope... It's all SMD (I even mounted the resistors upside down to improve performance) and the

I guess you don't have a wider spectrum analyzer? Raymond

Am 29.10.2023 um 16:15 schrieb Jared Cabot via groups.io: Use a down converter. If you have a -hp- 5257A Transfer Oscillator or similar, you can use that to downsample the HF to below

Are the two input chips identical? Is it reasonable to expect the two chips to behave similarly if different? Could it be that adding the resistors somehow adds enough capacitance to mess up the