Model 6220/6221 Reference Manual Applications E-7
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External user-supplied filter
Based on load impedance and response time requirements, a user-supplied filter
can be effective at reducing high frequency noise generated by the Model 622x
current source. This high frequency noise can drive the user’s DUT (Device Under
Test) in the 1MHz to 20MHz range and higher.
The filter circuitry is to be wired into a metal box that has two triax connectors
mounted on it for input and output. An example of such a filter box is shown
Figure E-6. The input of the filter box is connected to the output of the Model 622x,
and the output of the filter box is connected to the DUT.
Figure E-6
Example filter box
A) Exterior view of filter box B) Interior view of filter box (filter circuit wired in)
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