Matching a probe to my oscilloscope (15mhz)

[rappinrafi]

Hey all. As the title states, I have an analog oscilloscope with a bandwidth of 15MHz. I am in the market for a probe and have noticed a good deal of them to be in the triple digits.

Long story short, I've come across a quality probe kit that consists of 150MHz rated probes. Thus my question is if a 150MHz probe is too high for a scope with only 15MHz... literally an order of magnitude.

Thanks in advance.

 

[berkeman]

Hey all. As the title states, I have an analog oscilloscope with a bandwidth of 15MHz. I am in the market for a probe and have noticed a good deal of them to be in the triple digits.

Long story short, I've come across a quality probe kit that consists of 150MHz rated probes. Thus my question is if a 150MHz probe is too high for a scope with only 15MHz... literally an order of magnitude.

Thanks in advance.

Nah, higher is better, except higher BW usually means higher cost.

It's best if the probe has an input capacitance adjustment, to help match the input capacitance of the 'scope. Does your 'scope have a "calibration" output square wave available?

 

[rappinrafi]

Okay. Yes it does have cap adjustment; don't they all?

The scope does have a square wave output for calibration.

 

[Jiggy-Ninja]

Okay. Yes it does have cap adjustment; don't they all?

The scope does have a square wave output for calibration.

I can't seem to find one on the one I have. It has something that looks like one, but turning it doesn't do anything.

 

[berkeman]

Okay. Yes it does have cap adjustment; don't they all?

The scope does have a square wave output for calibration.

Good. Do you know how to use the square wave to calibrate the probe? Just tune the capacitance control until you get a nice square waveform. You're good to go!