Re: Unleveled E4436B
Hi Tim, How accurate is the power output at 4GHz? Tom Bryan N3AJA
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Tom B
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#94302
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Re: Test fixture for dielectric measurements
thanks Dave, I sent it on to Ron. Did you see his website? It turns out to be his old one and his new one is down which he did not know so he got after his IT guy. I will send an update when back up
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peter bunge
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#94301
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Re: Test fixture for dielectric measurements
Connecting to the material is a problem, especially above 1000 deg C. Metals may react with fumes and change or melt. Many insulators and dielectrics certainly will. We are watching these exchanges
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peter bunge
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#94300
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Re: Test fixture for dielectric measurements
Thanks John, we appreciate any information we can get. Even the old stuff which has a lot of information. PeterB
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peter bunge
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#94299
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Re: Unleveled E4436B
Hi Colby, I can still change things via GPIB, no problem so far, my simple Labview(Student Edition) program still works :) regards Tim de VK2XAX
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Tim Tuck
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#94298
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Re: Unleveled E4436B
Are you able to select those frequencies via GPIB? I am trying to decipher my 'work' notes to determine exactly why I determined the Model needed to be changed..... but... those software options are
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Colby Burkett
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#94297
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Re: Unleveled E4436B
Hi Colby, Frequency changes works nicely :) I haven't worked out the math for the host id either regards Tim
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Tim Tuck
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#94296
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Re: HP34702A Ohms converter issues
If you're measuring about 2 mA test current in the 1 K range, it's about twice what it should be, so focus on the opamp U3 circuit. The key is to have the 1 volt drop on the reference resistor string,
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Ed Breya
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#94295
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Re: Unleveled E4436B
I am definitely going to try this, again, myself. I swear that when I only changed the upper limit, I wasn't able to dial to the new upper limit until I changed the model. I hope I am mistaken.
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Colby Burkett
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#94294
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FS Agilent HP 8656B GENERATOR 0.1-990MHz + Opt 001 recent Calib
For sale - HP 8656B signal generator, 100 KHz to 990 MHz, with HPIB interface and Option 001 High Stability.? * Recent calibration up to 3-18-2017, kept indoors, non-smoking. * Operates well, very
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Ron
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#94293
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Re: Test fixture for dielectric measurements
Attached is a booklet from NPL on dielectric measurements. Is is noteworthy they advise against the term "dielectric constant" as no dielectric has constant properties. Dave. > Dielectrics GPG - 2003
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Dr. David Kirkby from Kirkby Microwave Ltd <drkirkby@...>
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#94292
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Re: HP34702A Ohms converter issues
Joel, your thoughts are always illuminating! 1K range, loaded by my Fluke 8600A in mA mode - 2.08 mA R55+R56 = 2.1V U3-3 to U2-6 = 2.06V Completely consistent, though the wrong values. ;-)? I checked
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gregdunn@...
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#94291
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Re: VNA advice wanted
[email protected]> wrote: In case you are not aware, VNAs are good around 50 ohms, but the uncertainy in reflection rises quite a bit if the reflection coefficient is high, or obviously in
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Dr. David Kirkby from Kirkby Microwave Ltd <drkirkby@...>
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#94290
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Re: VNA advice wanted
Thanks! That's where it is. I *really* do need to read the manual. I just hate reading long texts on a computer. Dimension is relevant to resolution, but conservation of energy still applies which
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Reginald Beardsley
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#94289
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Re: VNA advice wanted
Hi Regi. Measuring the performance of "EMI" filters can be done many ways depending on what kind of data or information is required. There are so many different kinds of filters and so many different
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Gedas
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#94288
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Re: Test fixture for dielectric measurements
drkirkby@...> wrote: I can maybe do this a bit later when I get the time for it... The test jig has SMA connectors, the BNC's are just adapters. All the SMA connectors are screw
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Askild
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#94287
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Re: 8753A VNA Repair
I have a TL866 eprom programmer, and they don't cost much on ebay.. It has worked fine for me. I too have a 8562A, and when updating the firmware to latest, I also replaced the eeprom with a 28C16,
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Askild
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#94286
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Re: VNA advice wanted
oops, I meant DSO1102G oscilloscope by the way, when you put the 8560A in DC coupled mode, be very careful of not applying any DC voltage to the input specially if the attenuation is low. It can
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amirb
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#94285
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Re: VNA advice wanted
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
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amirb
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#94284
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Re: Test fixture for dielectric measurements
Is there any chance you could take some detailed photographs and detailed dimensions? I have looked at the manual, but some more details would be nice. What of the BNCs connect to the guard ring?
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Dr. David Kirkby from Kirkby Microwave Ltd <drkirkby@...>
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#94283
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