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T&L* and
T&M*
Error-Correction
The HP 8753E analyzer has the capability of making calibrations using the
TRL*/LRM*
method.
TRL
Error-Correction
1.
.;
You must have a TRL calibration kit defined and saved in the
:$&$%@$.T..
as shown in
:: .
........
. . . . . . .../
>;;.;;
TT.T
.
. . . . . . . . . . .
. . .. . . . .
......
)
“Modifying Calibration Kit Standards,
n
located later in this section.
2.
3.
lb
measure the “TRL THRU,” connect the “zero length” transmission line between the two
test ports.
4.
“lb
make the necessary four measurements, press:
5.
‘lb
measure the “TRL SHORT,
n
connect the short to PORT 1, and press:
6.
Connect the short to PORT 2, and press:
7.
To
measure the “TRL LINE,” disconnect the short and connect the TRL line from PORT 1 to
PORT 2.
8.
9.
10.
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:.:.::..:.:.:.:.:.j
.
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..:.:
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The
line
data
is
measured
and
the
~~~~~~~~;,,;~~~rrrxs.
and
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softkey
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.w>::
.
.
..A.. .A....
..:
..,i
z.......
labels are underlined.
RI
measure the “ISOLATION” class, press:
n You could choosenot to perform the isolation measurement by pressing
_
_
.,.;
,.......,.
~~~~~~~~~~~~~
~~~~~~~~~.
;
./....,..
~w,.>;;;;..:
. . . . . . .
~~;;;........~........
_.A,.
. . .
..
. . . . . . .
.
. . . . . . .
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..~.=...;
.
. . . . . . . . . . . . . . . . . .
:::..;..
. . . . . . . . . . . .
As.,.;;;
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L.i.;;
.,..
ii . . . . .
. . . . . . . . . . . . . . . . . . . . . . . .
s........
. . .
i.
Note
You should perform the isolation measurement when the highest dynamic range
is desired.
‘Ib
perform the best isolation measurements, you should reduce the system
bandwidth, and/or activate the averaging function.
A poorly measured isolation class can actually degrade the overall
measurement performance. If you are in doubt of the isolation measurement
quality, you should omit the isolation portion of this procedure.
Note
If loads can be connected to both port 1 and port 2 simultaneously, then. the
. . . . .
following
measurement
can
be
perfomed
using
the
~~~~~~~~~:
...
.
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~~~~;--;;;;;;;.;;..;;;;--
. . . . . . . . . . .
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. . . . . .
.
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::.i/.
softkey.
5-24
Optimizing Measurement Results