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
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.)