Agilent Technologies N9340A - Manual (Page 49)

Making Measurements 4
N9340A User’s Guide 47
If the signal peak is not present on the screen,
span out to 20 MHz, set the center frequency to
the first marker frequency, span back to 2 MHz:
•
Press
[SPAN] > {Span} > 20 > {MHz}.
•
Press
[MARKER] > {Peak Search} > {Peak}.
•
Press
[MARKER] > {Marker To} > {To Center}
•
Press
[SPAN] > {Span} > 2 > {MHz}.
4 Change the resolution bandwidth (RBW) to 100
kHz so that the RBW setting is less than or equal
to the frequency separation of the two signals:
•
Press
[BW/SWP] > {RBW} > 100 > kHz.
Notice that the peak of the signal has become
flattened indicating that two signals are present.
5 Decrease the video bandwidth to 10 kHz:
• Press [BW/SWP] > {VBW} > 10 > kHz.
Use the knob or the arrow keys to further reduce
the resolution bandwidth and better resolve the
signals.
As the resolution bandwidth is decreased,
resolution of the individual signals is improved and
the sweep time is increased. For fastest
measurement times, use the widest possible
resolution bandwidth. Under factory preset
conditions, the resolution bandwidth is coupled to
the span
.