C H A P T E R
T H R E E
Noninsertable Devices
Noninsertable Device Configurations
General Theory
Th e o owing sequence describes the adapter removal
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method of calibration for measurement of a noninsertable
device. This procedure is the most complete and effective
calibration procedure for measurement of noninsertable
devices. Although this technique does require two separate
2-Port calibrations, it remains the only traceable method
for minimizing the uncertainty in this measurement. The
three precision adapters in this calibration kit provide the
parts required to make the process relatively easy.
Detailed information about the adapter removal
calibration is contained in HP Product Note 8510-13,
available from your local HP Sales Office.
The previous calibration sequence assumed that the device
under test is insertable; it has a male connector on one port
and a female connector on the other port. Thus, the
measurement system can be calibrated and then the test
device inserted without changing the system test port
connectors.
However, the majority of devices used in microwave
systems are noninsertable. Of interest here are devices
having either both male or both female 3.5 mm connectors
on Port 1 and Port 2.
Female to Female
If the device you are measuring has two female connectors,
your setup would look like the
on the left. he
female-to-female precision adapter is substituted for the
device under test to accomplish this calibration.
Male to Male
If the device you are measuring has two male connectors,
your setup would look like the figure on the left. The
to-male precision adapter is substituted for the device
under test to accomplish this calibration.
Male-Male
Under Test
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