In addition to what Jeff said in his posts, I usually run a test sweep on my HP8924 connecting the two cables together with a double female of the appropriate type. The result should be a flat line sweep but will usually show some amount of loss relative to the generator level/reference level. I note the amount of loss and either increase the generator output to place the line as near as possible to 0db or just remember to subtract it from the end reading. After I do the test sweep I connect the cabling to the device to be swept and proceed with measurements and tuning.
----- Original Message ----- From: "cruizzer77" <[email protected]> To: <[email protected]> Sent: Friday, August 06, 2010 3:35 PM Subject: [Repeater-Builder] Measuring duplexer insertion loss > Can somebody please explain how the insertion loss of a duplexer is > properly measured using a HP 8920A (with specan). I'm pretty new to this > instrument as well as duplexer work but am eager to learn. Thanks. > > 73 > Martin > > P.S.: Is it correct that a duplexer that has 40 dB isolation in each leg > does have 80 dB overall isolation? > > > > ------------------------------------ > > > > Yahoo! Groups Links > > >
