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- since 1996 -
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Technical Discussions
Mirham Abdallah Barakat
Mirham Abdallah Barakat
02:02 Sep-16-2000
relation between the gain of the pulser-receiver and the echo amplitude

I had made experiment showing the echo amplitude from a cylidrical
hole against the distance of the hole from the transducer
for various gain and the results showed that the echo amplitude
is inversely proportion to the gain but i haven't explanation
for this phenomena. Please if you have explanation
send it to me.

Thank you
Mirham



 
 Reply 
 
Dipl.-Ing. Martin Heinz
Dipl.-Ing. Martin Heinz
09:10 Sep-18-2000
Re: relation between the gain of the pulser-receiver and the echo amplitude
: I had made experiment showing the echo amplitude from a cylidrical
: hole against the distance of the hole from the transducer
: for various gain and the results showed that the echo amplitude
: is inversely proportion to the gain but i haven't explanation
: for this phenomena. Please if you have explanation
: send it to me.

: Thank you
: Mirham

Dear Mirham,

if you work with very high gain and the signal amplitude of the echo is very large it is possible that the receiver amplifier goes into saturation. In This case the echo seembs to be smaller.
Try reducing gain and look what happens.

Best regards,

Martin.



 
 Reply 
 
Udo Schlengermann
Consultant, -
Standards Consulting, Germany, Joined Nov 1998, 180

Udo Schlengermann

Consultant, -
Standards Consulting,
Germany,
Joined Nov 1998
180
09:17 Sep-18-2000
Re: relation between the gain of the pulser-receiver and the echo amplitude
s gain and the results showed that the echo amplitude
: is inversely proportion to the gain but i haven't explanation
: for this phenomena. Please if you have explanation
: send it to me.

: Thank you
: Mirham




 
 Reply 
 

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