MPP beach rev-e problem

[convola]

thank you. I used this cable to connect the coil to the circuit. When I removed this cable it became approximately 14us.

[convola]

Your receive signal is taking about 100us before it gets above zero, so the problem is nothing to do with the sampling.
Is your coil severely overdamped?

thank you. I used this cable to connect the coil to the circuit. When I removed this cable it became approximately 14us.

[convola]

Your receive signal is taking about 100us before it gets above zero, so the problem is nothing to do with the sampling.
Is your coil severely overdamped?

you are right. it is aproximately 90us. How many microseconds does it need to be?

[Qiaozhi]

tp9 min and max position like this. reject pot min and max position.

Your receive signal is taking about 100us before it gets above zero, so the problem is nothing to do with the sampling.
Is your coil severely overdamped?

[convola]

tp9 min and max position like this. reject pot min and max position.

[Qiaozhi]

I think you may be confused about the sample timing.
TP6 is the sample delay, and TP9 is the main sample.

[convola]

tp3 and tp2

[convola]

Looking at your photo. It appears your Tx pulse is approx 400us based on your scope setting of 250us/div, This is not correct, it should be around 100us or less, Check all the capacitors and resistors around the NE555 timer U1. Maybe you used a 470n when it should be a 47n? I think if you fix the tx pulse your other problem with the first sample will be solved

tp3 and tp2 like this. it is 100us pulse and 1ms period.

[Altra]

Looking at your photo. It appears your Tx pulse is approx 400us based on your scope setting of 250us/div, This is not correct, it should be around 100us or less, Check all the capacitors and resistors around the NE555 timer U1. Maybe you used a 470n when it should be a 47n? I think if you fix the tx pulse your other problem with the first sample will be solved

[convola]

I shifted the main sample pulse much more right because it was not able to sample the difference.

How did you shifted main sample pulse more right? In my circuit TP6 like this picture

[anil.berk]

In order to help others, how did you solve the problem?

I shifted the main sample pulse much more right because it was not able to sample the difference.

[surfdetector]

Thanks for your reply Qiaozhi. I just solved the problem

In order to help others, how did you solve the problem?

[anil.berk]

Is there no change in the signal?
Can you post a scope image?

Thanks for your reply Qiaozhi. I just solved the problem

[Qiaozhi]

Hi, I am also struggling with the same issue. I could not solve the problem on step 7.

Is there no change in the signal?
Can you post a scope image?

[anil.berk]

Hi, I am also struggling with the same issue. I could not solve the problem on step 7.