Agilent Technologies E7405A User Manual
30
Chapter 1
Making Basic Measurements
Tracking Drifting Signals
8.
The signal frequency drift can be read from the screen if both the
signal track and marker delta functions are active. Set the analyzer
and signal generator as follows:
signal track and marker delta functions are active. Set the analyzer
and signal generator as follows:
a.
Press
Marker, Delta
.
b.
Tune the frequency of the signal generator. The marker readout
indicates the change in frequency and amplitude as the signal
drifts. See
indicates the change in frequency and amplitude as the signal
drifts. See
Figure 1-21
Using Signal Tracking to Track a Drifting Signal
Tracking Signal Drift Example 2:
The analyzer can measure the short- and long-term stability of a
source. The maximum amplitude level and the frequency drift of an
input signal trace can be displayed and held by using the
maximum-hold function. You can also use the maximum hold function if
you want to determine how much of the frequency spectrum a signal
occupies.
source. The maximum amplitude level and the frequency drift of an
input signal trace can be displayed and held by using the
maximum-hold function. You can also use the maximum hold function if
you want to determine how much of the frequency spectrum a signal
occupies.
1.
Connect a signal generator to the analyzer input.
2.
Set the signal generator frequency to 300 MHz with an amplitude of
−
20 dBm.
3.
Set the analyzer as follows:
a.
Press
Preset
,
Factory Preset
(if present).
b.
Set the Y-Axis Units to dBm by pressing
AMPLITUDE
,
More,
Y-Axis Units,
dBm
.
c.
Set the resolution bandwidth to spectrum analyzer coupling by
pressing
pressing
BW/Avg
,
Resolution BW
(SA).