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Increasing
the
Frequency
Readout
Resolution
Using
the
Marker
Counter
The marker counter increases the resolution and accuracy of frequency
readout. When using the marker count function, if the bandwidth to span
ratio is too small (less than O.Ol), the Reduce Span message appears on
the display. If Widen RES BW is displayed, it indicates that the resolution
bandwidth is too narrow. If the signal being counted is the largest signal
within the 300 Hz bandwidth then the count will be correct. If there is
another, larger signal (even off the display), the count will be for the larger
signal.
Example: Increase the resolution and accuracy of the frequency readout on
the signal of interest.
1. Place a marker on the signal of interest. (If you are using the CAL
OUT signal, place the marker on the 300 MHz calibration signal. Press
[FREQUENCY] 300 (MHz),
m
100 (MHz), and
SPEAK
SEARCH].)
2.
Press
(MKR],
then MK COUNT ON OFF (ON should be underlined) to
turn the marker counter on. COUNTER and the frequency and amplitude of
the marker will appear in the active function area.
3. Increase the counter resolution by pressing More
I
of 2 ,
CNT RES AUTO MAN and then entering the desired resolution using the
step keys or the number/units keypad. For example, press 1
IkHz).
The
marker counter readout is in the upper-right corner of the screen. The
resolution can be set from 10 Hz to 100
kHz.
4. The marker counter remains on until turned off. Turn off the marker
counter by pressing
(MKR],
then MK COUNT ON OFF (until OFF is
underlined). (MARKER ALL OFF
also
turns the marker counter off.)
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