I connect my oscilloscope to an Diode-RL circuit to observe the wave form. The wave form appears completely different when I set my probe attenuation switch x1 and x10. When I set x1 I observe the expected wave function. When I set to x10 the probe and the scope I see an attenuating sinusoidal wave function.
Normally, a switchable 1:1/10:1 probe will put about 10 megohms in parallel with perhaps 5 pF at the node you're measuring, when in the
10:1 position, and in the 1:1 position, the scope's 1 megohm input resistance in parallel with whatever the scope probe cable capacitance plus the scope input capacitance is. I'd expect between about 50pF and 100pF. Normally, I'd expect the higher capacitance to cause ringing in an LC circuit, more than the lower one. But probes always affect the circuit they are probing to some extent. Understanding that, you could say that both observed waveforms are correct, for the total system you are observing, or that neither one is correct, since the probe always will change to some extent the thing you're trying to measure.
It's possible that something is wrong with the probe. Does it work OK on known waveforms? It's possible that the probe you have doesn't conform to my expectations about how they usually are made, too.
Can you give more details of the circuit? If you simulate the circuit, complete with a decent model of the probe, what waveforms do you see?
I am not sure I understand your question, but if the input impedeance of the "scope is 1 Megaohm in the X1 position then it puts a 9 Megaohm resistor in series with the input in the X10 position. So, the signal will seem to be
1/10 as big. Physically, the switch shorts out the 9 Meg resistor when it is in the X1 position. There will usually also be a small capacitor in parallel with the 9 Meg resistor. In addition, there will also be a small adjusting screw which you adjust in the X10 position while observing a square wave signal.
When the frequency of the ringing is maximum about 25% of the probe bandwidth you are using, the *10 setting would give the best reading on your oscilloscope.
It will not mean that it is a correct reading. For example when (for the frequency of the ringing and during the ringing) the output impedance can be regarded as 10 KOhms in parallel with 20 pF, your probe will give significant loading. Assuming ringing frequency above about 500 kHz.
When the ringing is in the MHz range, also ground connections may play an important role. If possible use (each after each other) the spring clip ground and ground lead with clip and change ground connections. When results are the same, grounding will probably be no issue.
There are nice probe docs on the web. Try for example
and go to the technical library, do a search on "probes" and you will find a tutorial on probes.
Note that special *10 probes for high frequency (for example 100 MHz) tend to show a low omhic load at high frequency that may damp ringing at MHz frequencies. This behavior comes from the measures to avoid reflections on the probe cable.
I don't know your circuit, but as the ringing occurs after the turn- off of the rectifier, the point where you are measuring may show high output impedance, hence it is likely that the input impedance of the probe distorts the measurements.
It's a switched 10:1scope probe feeding a scope. This specifies expected impedance levels. The frequency issue is answered by the OP. Voltage levels are irrelevant, as the source doesn't change from one setting to the next.
People that work with signals like that usually know their probe limitations. There's a high probability that newbies are working with slower lower level stuff. If the OP comes back and writes 'whaaaaaaa!...It still doesn't work' Then something freaky is going on and the weird and wacky stuff gets considered next.
You have to show a bit of patience, if you're going to be able to help any of the first-time posters of problems on this news group. Often, they'd have been better off to post elsewhere, if the issue is basic.
I think you'll find that anyone who is working on high voltage or at high frequency, will also be the first to point this out. As the OP has pointed out, his signal frequencies are below 1KHz.