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If unexpected phase
variations are observed,
this
indicates that the
elec&ical
delay of
the
adapter
was
not specified
witbin
a quarter wavelength over the frequency
range
of
interest.
‘lb
correct this, recall both
cal
sets, since the data was previously stored to disk, change the
:
.; .;
.:.:...:...j
.::
. . . . . . . . . . . .
,..
.:
adapter
&lay,
ad
press
~~~~~~
-
.:..:::
. . . . .
..i
:
Example Program
The
following is an
example
program for performing these
same
operations over
HP-IB:
10 !
File :
adaptrm. bas
20 !
30 !
This demonstrates how to do adapter removal over
HP--1B.
40 !
50 ASSIGN
ONa
TO 716
60 !
70 ! Select internal disk.
80 !
90 OUTPUT
ONa
*
“INTD
*
”
,
t
100 !
110 ! Assign file #1 to the filename that has a
2-port
120 !
caI
previously performed for Port l’s connector.
130 !
140 OUTPUT
ONa;
“TITFl”“FlODCAL1””
;
”
150 !
160 ! Recall the cal set for Port 1.
170 !
180 OUTPUT
ONa;
“CALSPORT
;
”
190 !
200 !
Assign file
112
to the filename that has a
2-port
210 !
cal previously performed for Port
2’s
connector.
220 !
230 OUTPUT
ONa;
“INTD ; TITF2”“F20DCAL2””
;
”
240 !
250 ! Recall the cal set for Port 2.
260 !
270 OUTPUT
ONa;
“CALSPORT
;
”
280 !
290 ! Set the adapter electrical delay.
300 !
310 OUTPUT
ONa;
“ADAPl58PS;
”
320 !
330 ! Perform the “remove adapter” computation.
340 !
350 ! OUTPUT
ONa;
“MODS
;
”
360 END
Optimizing Measurement Results 645