Hi All, I bought a Boonton 93A True RMS Voltmeter at a hamfest last weekend. I paid $5.00, I figured it probably didn't work, but for $5, I'd have a project. I plugged it in tonight and it works, although it seems to read about 9% low, or the meter on my signal generator reads high.
Anyway, I'm a little confused about the proper probe. I assumed a scope probe would be appropriate, but after reading this from the manual, I don't know.
"The input impedance of the 93A as supplied is2 Mohms in parallel with 25pf or less; a high impedance probe (93-1A) is available as an optional accessory. This probe has an input impedance of 10 Mohms in parallel with 11.5pf or less."
I'm thinking maybe that's a misprint.