Switch Repeatability - Agilent Technologies HP 8719D Service Manual

2. For the HP 8722D, perform the following steps:
should show a relatively flat line at about -10 f2 dB (-5 dB, Option 007).
at input A (port
exception of having a minimum of about -50 dB at 50 MHz and a value
around -10 f2 dB (-5 d.B, Option 007) over the flat section.
c. lb check input B (port 2) connect an open or short calibration standard to
have the same characteristics as described in the preceding step.

Switch Repeatability

Calibration does not compensate for the repeatability of the transfer switch
in instruments. As a result, the switch can be a source of error. To check the
switch, use the following procedure:
menu.
5.
times Return to the $1 measurement condition.
After 4 averages, the trace should look shiliar to Figure 410.
7. Repeat steps 2,3 and 4, only this time connect a short to port 2 and monitor
the S22 trace.
1). The trace should be similar to Figure 47, with the
. . . z z. x . . . . .. . . . . . . z-z- . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
to set the bandwidth to 100 Hz and take 4 averages
switch back and forth between SK+ and SII 6 to 12
. . . . " . . . . . . . . . . . . . _ . _ __. . . . . . ; i ~ ~ . . . . . _ . . . . . . . . . . . - .
.I - . , . . . _ . . . . . . . . . . , . . . . . . . . , ~ . . . _"..._. __
to access the response calibration
Start Tmubleshootin~ Hem 4-21
. . . . . . . . . . A? & .