When Start Frequency is Less than 2
If the start frequency is less than 2
measure the O-2
Loads as follows:
l
Connect a fixed load to Port 1 and a fixed load to Port 2.
l
Press O-2 LOADS. The HP 8510 makes six measurements.
All frequencies are measured, but only data up to 2
are used. These measurements replace error coefficients
obtained from measurement of the 2-7
air line below
2
Leave the loads connected for the Isolation step.
Connect the
O-2
Loads
l
Press LINES DONE.
l
Press ISOLATION.
If maximum transmission dynamic range is not required, skip
the isolation part of the calibration by pressing OMIT
ISOLATION and then ISOLATION DONE.
Or, to obtain maximum transmission dynamic range,
perform the isolation part of the calibration as follows:
. Connect a fixed load to Port 1 and a fixed load to Port 2.
. Increase the AVERAGING FACTOR for the isolation
measurement to at least 128. Then press FWD. ISOL’N
ISOL’N STD. is measured.
Press REV. ISOL’N ISOL’N STD.
is measured.
Press ISOLATION DONE. You may wish to reduce the
averaging factor for measurement of the device under test.
Press SAVE TRL
and Reverse
Standards
When the computation of error coefficients is complete, press
CAL SET 1 (or any other cal set). Error coefficients derived
from measurement of the TRL standards are computed and
saved, and then 2-Port correction is turned on.
Carefully
inspect
the
connectors
on the device under test
and measure their center conductor pin depth before
connecting the device under test to the system.
under-test connectors with incorrect pin size, pin depth,
or pin alignment can damage the test port adapters.
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