Agilent Technologies E7405A User Manual
Chapter 1
15
Making Basic Measurements
Resolving Signals of Equal Amplitude
Resolving Signals Example:
Resolve two signals of equal amplitude with a frequency separation of
100 kHz.
100 kHz.
1.
Connect two sources to the analyzer input as shown in
.
Figure 1-4
Setup for Obtaining Two Signals
2.
Set one source to 300 MHz. Set the frequency of the other source to
300.1 MHz. The amplitude of both signals should be approximately
300.1 MHz. The amplitude of both signals should be approximately
−
20 dBm at the output of the bridge.
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 center frequency to 300 MHz by pressing
FREQUENCY,
Center Freq
, 300,
MHz
.
d.
Set the span to 2 MHz by pressing
SPAN,
Span
, 2,
MHz
.
e.
Set the resolution bandwidth to 300 kHz by pressing
BW/Avg
,
Res BW
, 300,
kHz
.
NOTE
If the signal peak is not present on the display, do the following:
1.
Increase the span to 20 MHz by pressing
SPAN,
Span
, 20,
MHz
.
The signal should be visible.
2.
Press
Peak Search
,
FREQUENCY
,
Signal Track
(On)
3.
Press
SPAN
, 2,
MHz
to bring the signal to center screen.
4.
Press
FREQUENCY
,
Signal Track
(Off)