On 12/21/2013 11:21 PM, W7ZZ wrote:
I am an officer of a local radio club. We have had a number of
monoband bandpass filters donated over the years that we would like to
use for Field Day, etc. The question is: How do we determine that
they work? Any advice will be appreciated.
The best way is to sweep them with a signal generator connected to one
port and a voltmeter (or some other calibrated RX) connected to the
other port. You can do this with anything from a manual generator to a
vector network analyzer or spectrum analyzer with tracking generator.
The vector network analyzer is best -- it can measure the amplitude
response and the SWR -- but I've gotten good data doing point by point
measurements with an HP generator and calibrated voltmeter.
73, Jim K9YC
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