Frequency Counter At Marker - Agilent Technologies N9913A User Manual

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Frequency Counter at Marker

Available in SA Mode ONLY. Use any existing marker to make highly-accurate
frequency counter readings. For highest accuracy, lock the FieldFox to a stable
external frequency reference. Learn how on page 209.
When Frequency Counter is ON, the FieldFox uses background sweeps to zoom
on the signal, measure the signal peak with 1 Hz resolution, and display the
frequency of the signal peak in the marker annotation area. The marker does not
move to the signal peak.
When Freq Counter is ON, measurement sweeps are considerably slower.
How to use Frequency Counter
 Press Marker .
 Press Normal, Delta, or Peak, or select an existing marker to use as a frequency
 Locate the marker somewhere on a CW signal. It does NOT have to be on the
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 With Freq Count ON, you can scroll through the existing markers that are
Time Zero Fixed Marker
This feature was created to allow recall of vintage instrument states (older than
Rev. 7.0) that included Zero span sweep with a trigger delay and at least one
marker. Before Rev. 7.0, these instrument states were saved and recalled with
the equivalent of the ON state of this setting. The default setting is OFF. Learn
more about Triggering with negative delay on page 100.
How to set Time Zero Fixed
 Press Mkr->/Tools
112
Marker Function
Band/Int Power
Band (or Interval) Span
Measures power over 5% of the displayed span, or ½ graticules. The
Auto
o
Band Span is automatically updated to remain at 5% when you change the
frequency span.
Enter a frequency or time value using the ▲|▼ arrows or the rotary
Man
o
knob, then press Enter. Or enter a value using the numeric keypad and
select a frequency or time suffix. The Band Span remains at the frequency or
time value that you set as the span changes.
counter.
peak.
More
Freq Count ON
located on a discrete CW signal, and read the frequency of the signal peak.
However, each frequency count update requires another sweep. If the FieldFox
is in HOLD, press Single to update the frequency count results.
FieldFox User's Guide