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Section 9
Reflection measurements (continued)
Figure 10. Short circuit normalized
Figure 11. Return loss of the bandpass filter
Instruction
Preset the analyzer.
Turn on tracking generator, set the output
level to –10 dBm.
Set the start and stop frequencies for your
DUT. (Frequencies shown here are for example
only.)
Disconnect the DUT, and connect a cable from
the input connector to the directional bridge
output connector.
Normalize to eliminate the test system
response error.
Change the normalized reference position.
Reconnect the DUT without changing any
analyzer settings and terminate the uncon-
nected port of the DUT.
Use a marker to read the return loss.
18
Key strokes
[PRESET]
[MODE], {Tracking Generator}, [ENTER],
{Amplitude {On}}, –10, dBm
[FREQ], {Start Freq}, [100], {MHz} {Stop
Freq}, [500], {MHz}
[MEAS], {Normalize}, {Store Ref (1 to 4),
{Normalize {On}}
{Norm Ref Posn}, 8, [ENTER]
Position a marker and rotate the knob
to find the highest peak; this is the
maximum return loss.
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