NF ZA57630, Instruction Manual

Page: 170 / 246

4.2 Simple Operation for First Time Use
4
-
12
ZA57630
4.2.5 Measuring Gain and Phase (Measurement Mode: G
−PH)
The G−PH measurement mode is a mode to measure the transmission characteristics of an
amplifier, filter, etc.
Figure 4-7 Gain and Phase Measurement Connection Example
Measure and display the gain and phase of the
PORT1
signal using the
PORT2
signal as the
reference. The gain-phase characteristics of the EUT (equipment under test) can be obtained
by measuring with the input signal of the EUT connected to
PORT2
and the output signal
connected to
PORT1
as shown in the figure above.
Set up this instrument and perform measurement in the following order.
1) Set the measurement mode to G−PH in the
[Mode]
menu.
2) Reset the settings and then connect the EUT.
3) Tap
[SETUP]
or press the
SETUP
key and then change each setting item as necessary.
[DISPLAY MODE Y]
: Set the graph Y-axis item.
[SWEEP ITEM]
: Set the sweep item.
[SWEEP UPPER]
: Set the sweep upper limit.
[SWEEP LOWER]
: Set the sweep lower limit.
4) Press the
AC/DC ON
key to turn measurement signal output on.
5) Press the
MEASURE DOWN
key to perform down-sweep measurement and then wait for
the sweep to end.
6) Operating the knob moves a marker on the measurement data. This allows you to read the
measurement value at any frequency. You can also perform operations such as detecting
the maximum value, searching, and finding the location of an arbitrary gain value. For
more details on the operations, refer to
“1.7 Marker Operations”
in
Instruction Manual
(Advanced)
.
Performing equalizing enables measurement for which the errors of the measurement
system are corrected. For details on equalizing, refer to
“1.8.8 Equalizing”
in
Instruction
Manual (Advanced)
.
EUT
PORT2
L
CUR
ZA57630
PORT1
H
POT
OSC
H
CUR
BNC
Tee adapter