NF FRA5087, Instruction Manual

Page: 77 / 194

4.1 Overview of measurement and processing
FRA5087
4-3
4.1.1 Measurement mode
There are three (3) measurement modes available, i.e., (CH1, CH2), (CH1, OSC) and (OSC, CH2),
one of which is selected for the measurement. The measurement mode is set through the menu
[Measure][BASIC FUNCTION][MEASURE MODE].
Note: The measurement mode (CH1, CH2), for example, is sometimes expressed as (CH1 and
CH2) in this Instruction Manual.
CH1
CH2
O SC
D
F
T
V 1
=|V
1
|,θ
1
V 2
=|V
2
|,θ
2
CH1
CH2
O SC
D
F
T
V 1
=|V
1
|,θ
1
V 2
=|V
2
|,θ
2
a) CH1, CH2 b) CH1, OSC
CH1
CH2
O SC
D
F
T
V 1
=|V
1
|,θ
1
V 2
=|V
2
|,θ
2
c) OSC, CH2
Fig. 4-2 Measurement mode and internal connection
The measurement mode (CH1, CH2) is used for the three-port system and the measurement
modes (CH1, OSC) and (OSC, CH2) are used for the two-port system. Note, however, that the
two-port system measurement provides better results for the measurement mode (CH1, CH2),
since the effect of cables can be reduced in the two-port system measurement.
CH1 CH2 OSC
S.U.T
In Out
FRA5087
Measurement mode: (CH1,CH2)
Fig. 4-3 Recommended measurement connection for two-port system