I seem to remember that the cable is nichrome, and about 200 ohms.
IIRC about a 10K input impedance at the analyzer, and a 100K at the probe tip.? From what I remember, there's about a 7pf capacitor to compensate the divider, and HP did sell parallel RC networks for building into a project and using direct connection to the analyzer.
You have 2 commonly available connections, the 20 pin pod (which I build into PC boards), and the squid (which I use only for debugging of other parts of the circuit).? The less common method would be a direct connection to the 40 pin connector with you supplying the RC networks.
Harvey
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On 8/29/2024 9:56 AM, Adrian Godwin wrote:
I believe the cable from 40-pin connector to tip moulding is actually twisted pair rather than coax. It certainly was in the burnt one I took apart. The tip moulding contained a ceramic hybrid circuit as documented in the probing manual, with SMD capacitors and a thick film resistor on the substrate. However, I didn't measure the cable resistance.
