Fraancesco, Have you tried a T-PAD?  Experement with two 10k resistors. 
Place a 10k resistor in series in one of the inputs and another 10k 
resistor in parallel across both inputs to form a T-junction. While this 
will attenuate the output, it will also change the period of the sensor so 
you need to find a value that works for both.

Regards, Steve Hammond PSN Aptos, CA

-----Original Message-----
From:	Francesco [SMTP:franuc@..........
Sent:	Wednesday, January 09, 2002 4:14 AM
To:	psn-l@..............
Subject:	MARK SENSOR

Hi to all
from some weeks I'm using in my station 3 Mark L4 sensors with Larry's 
ampli board.
The output signal is very high, and a small events also near me saturats 
the amplitude.
The gain is at min.

What I do to resolve this problem?

In another station of our network, we use the Mauro Mariotti's ampli board 
with the input resistor of 22k and all works fine.

Can I do the same change?

regards

Fraancesco     Italy
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