Specifications

Sweep Time
The defined Sweep Time value for each segment affects the accuracy of the
measurement results more than any other parameter in the RF Segment
Table. The following procedure can be used to decrease the Sweep
Time below the spectrum analyzer's normal setting for the specified
frequency span, resolution bandwidth, and video bandwidth and maintain
measurement accuracy.
1. Connect a signal to the RF analyzer input. The frequency of the input
signal must be within the Measurement Range of the segment of
interest. A higher frequency signal can be used provided the span is
maintained and centered on the signal.
2. Set the RF analyzer to the Measurement Range (span), Bandwidth,
and Video Bandwidth specified for the segment. (The RF analyzer will
select an appropriate default Sweep Time setting.)
3. Position the marker to the peak of the input signal and note the level
of the signal.
4. Begin decreasing the Sweep Time and note the change in the signal
level for each change from the level in Step 3. To maintain adequate
measurement accuracy, the signal level should not change by more
than .3 dB. Enter the resulting value in the Segment Table. Typically,
the sweep time can be reduced by a factor of 2 or more from the value
set by the analyzer.
NOTE
The HP 3048A makes accurate measurements even though
the RF analyzer may be indicating that it is being oper-
ated in an uncalibrated condition, as long as the above
procedure has been used to verify the response.
RF Segmnts 5-27