on my 8560E the AC/DC coupling is under Amplitude softkey menu on the second page. It's probably the same on 8560A
because on my 8596E it is also under the amplitude menu
your analogy with seismology is not quite relevant when we talk about a circuit at 30KHz or few 10's or 100's of KHz
The size of the whole circuit and all connections is not even 0.001 of the wavelength contrary to the sizes or distances you are dealing with in seismology
For evaluating these kinds of low frequency (lumped) circuits I would get an Agilent oscilloscope with built in function generator
which has a bode plot software in it like a DSO1104G which is relatively cheap. You can automatically find the bode plot of? V_out / V_in.
I'd think with a little bit of imagination one could also set it up to plot the input impedance as well.
Or you can get something like an HP 4192A gain and phase and impedance analyzer and measure the transfer function and input/output impedances down to 5Hz
same thing can be done with HP 8508A vector voltmeter.
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On Mon, Feb 11, 2019 at 01:33 AM, Reginald Beardsley wrote:
I've been lazy and not read the entire manual. Where do you set the coupling? I fired it up and tried all the buttons, but did not find the AC/DC coupling on my 8560A.
I presume I'd need to first measure the input and output impedances and then construct matching baluns..
Whatever is not reflected is transmitted except for any absorption due to resistive losses. So except in certain pathological cases reflection does not matter. But sometimes it does. In reflection seismology the water layer reverberation is a major aggravation.
I'm afraid I've gone off the deep end. My power feed for my bench is all shielded with Liquatite SL-516 flex conduit. I cut off the cords, and ran them from Appleton 4SS boxes (which I do *not* recommend as it gets *very* cramped). I bought them because they fit the external space nicely, but got beat up pretty badly getting the wires to fit inside. I still need to mount a 20 A EMI filter where I connect to the mains.
I've got a filter, but it's rather large and I still need to find a suitable enclosure.
This might seem like overkill, but if you investigate the radiated EMI from a GW Instek GDS-2000E series scope you'll be appalled by the radiated EMI. There is *no* shielding on the SMPS. I plan to correct that as I have a bending brake and can fabricate an enclosure, But after discovering the issue decided that shielding my power feed was worth while. Besides which I really did not have room for runnning all the power cords into power strips. The last attempt at that led to a wad of cables of absurd dimension.
As for probes, so far Bob Pease has kept me to the strait and narrow.
