I've used high quality RG-174 and have had results which SEEM to match up with calibrated numbers.? Am I sure?? Absolutely not.
Peter
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On 4/14/2019 5:58 PM, peter bunge wrote:
It is a bit strange that the length switch on the HP4192A is 0 and 1 meter positions but the cable with the 16047B is about 20" and it is specified for below 2 MHz.
The 16048A is specified as 1 meter length and good to 10 MHz on the HP4275A.. It is not always obvious which instrument the various fixtures are intended for as many were made years (10 or more) after an instrument was made.
A test with (unknown) teflon coax worked with the 4192A but the length switch had no effect. I will check again at max frequency. Comparisons with test capacitor shown below.
PeterB
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On Sun, Apr 14, 2019 at 5:27 PM Paul Bicknell <paul@... <mailto:paul@...>> wrote:
Hi the only thought I have is as follows
Coax cables used for charge amps? as in Pc / volt often have carbon type
of material over the dielectric then the screen? to reduce any mechanical
noise
Just a thought
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<mailto:[email protected]>] *On Behalf Of *peter bunge
*Sent:* 14 April 2019 22:18
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*Subject:* [HP-Agilent-Keysight-equipment] Type of coax for Impedance
Analyzer Test Fixtures
Does anyone have any idea what kind of coax is used for the 16048A,
example below, or other test fixtures.
HP say not to substitute. They are in various colours.
Are they 50 ohm or just shielded wire? Perhaps low capacity?
My dielectric test fixture is near completion and I need cables. It would
be nice to have the four coax in one sheath.
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