Quote:
Originally Posted by Skywave
The load on the circuit, compared to a 10:1 probe will be less on account of the higher value series resistor.
Al.
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Not necessarily. I've come across 100:1 probes where the higher ratio was done by having a shunt resistor at the scope end and a shunt capacitor for equalisation.
If you're interested not so much for the voltage scaling as for the higher impedance, then building your own with 75 ohm coax isn't so bad as the capacitor ratio is more favourable at 100:1 so the cox isn't as damaging to bandwidth.
If you don't want a lot of voltage range, but do want high Z then you may be in the market for an active probe?
David