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

.;

as shown in

:$&$%@$.T..

::

................../>;;. . ..;;. . . .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.

,, :.:.::..:.:.:.:.:.j ....

 

.:::::~ ..:.: _ .............................

9. The line data is measured and the ~~~~~~~~;,,;~~~rrrxs. and ~~~~~~~~~~~~~;, softkey

.

.

............s .....,~~.,,,...;:............. _..,,.,,,.L...//.......w>::....A...A......:..,i z.......

labels are underlined.

10. RI measure the “ISOLATION” class, press:

n You could choosenot to perform the isolation measurement by pressing

 

_

_

 

 

.,.; ,.......,.

~~~~~~~~~~~~~ ~~~~~~~~~.

;./....,.. ~w,.>;;;;..:

.......~~;;;........~........ _..A,. ..... .... . . ..

........~.=...;...

.......:::.....;.... ............

As. ..,..;;;. .,........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 ~~~~~~~~~:

 

.....::./...~~~~;--;;;;;;;.;;..;;;;--

...........l: ..: ........~..............

::.i/.

softkey.

5-24 Optimizing Measurement Results