U2829 Series Operation Manual Chapter 3 Introduction to [DISP]
31
No matter what the current frequency is, U2829 will execute short correction
test on the 41 fixed frequency points. Except the 41 frequencies, the
instrument will adopt imbedding algorithm to calculate the short correction
data of different test frequencies which correspond to different ranges. Move
the cursor to the
SHORT
zone, and then use the
SWEEP SHORT
soft key to
execute full frequency open correction. The 43 fixed frequencies are the same
as that in open correction.
U2829 can set 64 short correction frequencies in the
SPOT NO.
and
FREQ
zone on the
<CORRECTION>
page. Move the cursor to
SPOT NO.
and
FREQ
, and then use
SPOT SHORT
to short correct the set frequencies.
Operation steps of short correction function
Short correction includes full frequency short correction which adopts imbedding
algorithm and single frequency short correction on 64 frequencies. Execute the
following operation steps to make short correction. The single frequency short
correction can refer to “Load correction”.
1)
Move the cursor to the
SHORT
zone, the following soft keys will be displayed:
ON
OFF
SWEEP SHORT
2)
Connect the test fixture to the test ports. Short the test fixture by using short
plate.
3)
Press the
SWEEP SHORT
soft key, U2829 will test the short spurious
impedances (resistance and reactance) of 41 frequencies. Short full
frequency correction takes about 75 seconds and in this process, the
following soft keys will be displayed.
ABORT
This soft key can be used to cancel the current short correction operation and
reserve the formal open correction data.
4)
Press
ON
to validate the short correction function. U2829 will make short
correction calculation in latter test. If SPOT FREQ is set as OFF, the short
correction function will calculate the short correction data of the current
frequency. If SPOT FREQ is set as ON and the current frequency is SPOT FREQ,
the short correction data of SPOT FREQ will be used in the calculation of the
short correction.
5)
Press
OFF
to turn off the short correction function. In latter test, no short
correction calculation will be performed.
3.5.3
LOAD
By using transport coefficient between the real test value and the standard
reference value at the preset frequency (
SPOT NO.
), the load correction of
U2829 can eliminate the test error. It is obvious that open, short, and load
correction can be performed at preset frequencies. The 64 preset frequencies can
be set in the setup zones of
SPOT NO.
. The standard reference values can be set