I need an orientation on how to attenuate signals for my osc

Re: I need an orientation on how to attenuate signals for my

Hello everybody:

I have a hitachi 20 Mhz oscilloscope, I used it in my lab with the original probe, but now I'm using it a lot to measure signals from my car. I don't want to use the original probe and I want to build a good attenuate box, with selectable attenuator scale, but I don't know how to do it.
In addition, if I build it, I could make larger and strongest probes.

Anybody could give me an orientation on how to do it?

I want to know how the original probes attenuate the signals, I dont's know if it's probes attenuate signals using resistors or something else.

I have only one more question:
Somebody know what is the maximum large for an osc probe?

Thank you very much.

By,

GuillerMo (AR)

Added after 14 minutes:

I forgot to mention that I want to put this in a box. So I could connect the osc to the attenuator box, and then connect the probes to it.

Thanks again.

By,

GuillerMo (AR)

Yes, passive probes are resistive - capacitive dividers. Compensating capacitor connected in parallel with input resistor, it's capacitance equal to oscilloscope input capacitance.

Re: I need an orientation on how to attenuate signals for my

umup said:

Yes, passive probes are resistive - capacitive dividers. Compensating capacitor connected in parallel with input resistor, it's capacitance equal to oscilloscope input capacitance.

Click to expand...

Do you know were could I found some theory about it. I need to know how to calculate the attenuation correctly.

By,

GuillerMo (AR)

Here some interesting links, maybe helpful :
http://oscilloscope-tutorials.com/oscilloscope/Setting.asp
http://members.tripod.com/michaelgellis/scope/atten.html
http://gaia.ecs.csus.edu/~bayardj/eee117l/images/scope_probe_1.pdf

Types of capacitors/resistors and assembling quality is important