NF FRA5087, Instruction Manual

Page: 129 / 194

5.4 Operation method
FRA5087 5-9
5.4.3 Graph screen description
5.4.4 Shunt resistance current-voltage conversion coefficient setting
Use the menu [INPUT] [WEIGHTING FACTOR] to set current-voltage conversion coefficient.
Setting range is 0 to 1.0E+6.
Voltage input is CH1. If connecting a preamplifier with a gain of 100, set the CH1 weighting
factor to 0.01 (inverse of 100).
Current input is CH2. If the CH2 shunt resistance is 100 m
Ω
, set the CH2 weighting factor to
10 (inverse of 100 m).
Set invert on to invert the phase (+180
 ). This can be effective for inverting voltage and current
phase when measuring impedance.
Fig. 5-1 Phase invert connection
Impedance units
Graph and impedance units are shown
Vertical axis scale can also be shown with log spacing
OSC: 100.0000000MHz 7.00 Vpeak DC 1.00 V INTEG: 100cycle HMNC: 1
SWP: 100steps/sweep CPRSN:OFF SLSWP:OFF ANAL:CH2/CH1 EQL:OFF
SWEEP STOP
1
2
3
4
5
6
PHASE[deg]
FREQUENCY(Hz)
IMPD[ƒ ¶ ƒ n
1m
10m
100m
10 100 1k
100k
-90
-75
-60
-45
-30
-10
0
*f: 1.0000000kHz ƒ @ƒ @ƒ @*R: 7.5 mƒ ¶ ƒ @ƒ @*ƒ Æ : -80.66 deg
INVERT:OFF
CH1(V)
DUT
SHUNT
CH2(I)
+
+
-
-
ƒ d ƒ ³ ƒ Æ ƒ d ƒ ¬ ƒ Ì
ƒ ü ƒ Í ƒ O ƒ ƒƒ ƒƒ h ƒ ¤ ƒ Ê
INVERT:ON
CH1(V)
DUT
SHUNT
CH2(I)
+
-
-
+
Common ground for voltage
and current inputs