Agilent Technologies 8510C, Руководство по эксплуатации и программированию

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The Analyzer Remembers Previous Settings
(Limited Instrument State)
The analyzer has a system of remem b ering the settings y ou use. This allo ws y ou to switch
b et w een measuremen ts and ha v e the instrumen t automatically remem b er all the settings y ou
ha v e previously made. This feature is automatic, in that it do es not require y ou to use a sa v e
or recall function.
This ability to remem b er past settings is called a \limited instrumen t state," and w orks as
follo ws:
Channels 1 and 2 act like separate net w ork analyzers. The analyzer remem b ers the v arious
settings y ou make in c hannel 1. If y ou c hange to c hannel 2, the instrumen t remem b ers all
the settings (listed b elow) automatically . When y ou come bac k to c hannel 1, all the settings
rev ert to their original state. Channel 2 w orks the same w a y . Eac h c hannel remem b ers all of
the settings listed b elow.
The selected domain (F requency Domain, Time Domain or V oltage Domain). In addition,
eac h domain mo de remem b ers all of the following settings.
The selected measuremen t parameter (S
11
, S
12
, S
21
, or S
22
). Eac h parameter (S
11
, S
12
, and
so on) also remem b ers the display format (graph t yp e) and resp onse (scale and reference)
settings.
F or example, y ou might w an t to display S
11
and S
22
on a Smith Chart; group dela y for S
21
;
and phase for S
12
.
T o set this up:
1. Press 4 S11 5 4 SMITH CHART 5.
2. Press 4 S21 5 4 DELA Y 5.
3. Press 4 S12 5 4 PHASE 5.
4. Press 4 S22 5 4 SMITH CHART 5.
No w, randomly select b et w een S
11
, S
12
, S
21
, and S
22
. Notice that the analyzer remem b ers
the display format y ou c hose for eac h one.
As men tioned ab o v e, eac h parameter selection remem b ers the scale and reference v alues y ou
last en tered.
F or example, y ou can select S
11
, LOG MA G, at 10 dB/division; and S
11
, PHASE at 5
degrees/division. No w if y ou go bac k and forth b et w een LOG MA G and PHASE display ,
y ou can see that the scale switches as w ell.
F or eac h parameter, the following information is memorized b y the analyzer:
1. The last selected format (Log Mag, Phase, Smith Chart, and so on).
2. The last selected resp onse settings (displa y scale and reference, and so on).
3. Whether calibration w as last On or O for the parameter. This makes it v ery easy to
switch b et w een displays of dieren t parameters without ha ving to sp ecify the format eac h
time.
4. The display color setting.
F actory Preset alwa ys establishes a xed denition for the complete
Channel/Domain/P arameter/F ormat/Resp onse limited instrumen t state memory .
1-14 Introduction to the 8510C
Netw ork Analyzer System