STB8827
Series Operation Manual Chapter 3 Introduction to [MEAS]
31
page.
Open correction (
OPEN
)
Short correction (
SHORT
)
Load correction (
LOAD
)
Cable length selection (
CABLE
)
Load correction test function (
FUNC
)
Calibretion point
(SPOT No.)
Frequency points of OPEN, SHOR and LOAD (
FREQ
)
Reference values for frequency points (
REF A
,
REF B
)
Open values for frequency point (
OPEN A
,
OPEN B
)
Short values for frequency point (
SHORT A
,
SHORT B
)
Load values for frequency point (
LOAD A
,
LOAD B
)
There are 16 zones on this page:
CORRECTION
,
OPEN
,
SHORT
,
LOAD
,
CABLE
,
FUNC
,
SPOT No.
,
FREQ
,
REF A
,
REF B
,
OPEN A
,
OPEN B, SHORT A
,
SHORT
B, LOAD A
,
LOAD B
. Each control function zone will be introduced in the
following paragraphs.
Besides above setting zones, the <
CORRECTION
> page will also display the
following monitoring zones. The monitoring zones are similar with the setting
zones, but the monitoring zones can only provide information and you cannot
change state or parameter of these zones, except
REF A
and
REF B
.
The real test results of load correction can be tested on
FREQ
.
3.6.1 OPEN
The open correction function of
STB8827
can eliminate the error caused by
the stray admittance (G, B) parallel-connected with DUT, shown as figure 3-1.
Figure 3-1 Stray Admittance
STB8827
adopts the following two kinds of open correction data
:
STB8827
C will automatically make open correction test on 48 fixed
frequency points no matter what the currently set frequency is. Based on
the open correction data of the following 48 frequencies, the instrument
can calculate all open correction data of different test ranges which
corresponds to all test frequencies.
Move the cursor to
OPEN
and then used
MEAS OPEN
to execute full
frequency open correction. The highest test frequency of
STB8827
A is
300kHz (43 points), the highest test frequency of
STB8827
B is 500kHz
(45
