Regarding Oscilloscope

[pankaj]

+hp 8093a

Hello,

I have a TDS3064B scope (600 MHz, 5GS/s scope). I have a voltage probe of 500 MHz Bandwidth. Can I measure a 125 Mhz clock signal with this. I am just able to see a sine wave of 125 MHz while I expect a square wave.

With regards
Pankaj

 

[dipal_z]

Based on the ratings you have given, you should be able to see the waveform properly. Make sure that you have not enabled bandwidth limit and your probe really support what is documented (specially if you bought it separately)

 

[angelote]

Don't expect to see a "perfect" square wave; neither a pure sine wave. It will be like a filtered square wave.

 

[echo47]

The P6139A probe has a lot of capacitance, so you must carefully ground it. Don't use the long ground lead - it has too much inductance. Use the short ground pin accessores supplied with your probes. 195-4240-00 works ok, but the best is 131-5031-00.

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Here is the output of an HP 8093A pulse amplifier, using Tek TDS3054B scope and P6139A probe.