NF FRA5097, Instruction Manual

Page: 130 / 192

5.3 Open and short correction
FRA5097 5-8
5.3 Open and short correction
5.3.1 Connection for open and short correction data storage
Although open and short can be simultaneously corrected, these are used separately according to
the impedance to be measured.
Short correction: Low impedance (under about 10
Ω
)
Open correction: High impedance (above about 1 k
Ω
)
Connections for storing open and short correction data are indicated in Figs. 5-3 and 5-4
.
FRA5097
OSC CH1 CH2
Measurement
terminal
open
Current detect
resistor
FRA5097
OSC CH1 CH2
Measurement
terminal
Shorted
Current detect
resistor
Fig. 5-3 Open correction example Fig. 5-4 Short correction example
5.3.2 Data measurement and storage
Measure and store the open and short data as follows.
1) Set the menu [Measure] [BASIC FUNCTION] [OPEN CORRECTION] and [SHORT
CORRECTION] at off.
2) Measure the impedance terminal in open state. Use the menu [Memory] to select [STORAGE],
and so show the function keys indicated in Fig. 5-5. Press [OPEN STORAGE] to store the
open correction in memory.
MASS
STORAGE PERMANENT
STORAGE EQL
STORAGE
=
OPEN
STORAGE SHORT
STORAGE
Fig. 5-5 Open and short correction function keys
3) Measure the terminal in shorted state and press the [SHORT STORAGE] key to store the short
correction data in memory.
Note: Be sure both correction functions are off when measuring the correction data. Measure the
DUT at the same frequency range, oscillator amplitude and other conditions as the correction
data.