[R-390] Technical Question somewhat related to R-390s

[k2cby]

Yes, Barry.

 

You've got the explanation exactly right. The function generator has a low
impedance - probably 50 Ohms - maybe even less.

 

This kills the Q of whatever side of the transformer it's connected to.

 

To avoid this, connect a resistor (anywhere from 1k to 10k) in series with
the function (or signal) generator.

 

Of course, this will substantially reduce the input level to the scope.

 

  

 

Miles B. Anderson, K2CBY
16 Round Pond Lane
Sag Harbor, NY 11963
Tel.: (631) 725-4400

Fax.: (631) 725-2223
e-mail: k2cby at optonline.net