Datasheet

9.6. Span Pair
One of the marker types. When selected, a pair of markers will appear on trace, which are
Referenece Marker (indicated with number and letter “R”, like “1R”) and Delta Marker (indicated with
number and letter “D”, like “1D”).
Key points:
 You can adjust the position of reference marker (select “reference”) and Delta Marker by
numeric keys, knob and arrow keys at the same time.
 When select “Range”, adjusting “Span Pair” will keep the center position of two markers and just
move them to sides ( value increasing) or center (value decreasing).
 When select “Center”, adjusting “Span Pair” will keep the relative distance and just move the
center to left (value increasing) or right (value decreasing).
 The difference between Span Pair and Dalta: you just can modify the delta point in Delta type,
but you can modifiy both delta point (select Delta option) and reference point (select
“Reference” option) in Span Pair type at the same time.
9.7. Off
Turn off the current selected marker. All the information and related functions will also be turned off.
9.8. Marker Trace
Select one trace for current marker from 1, 2, 3 Math and Auto (default). When select Auto, the
system will search desired trace in the order of “Clear Write”, “Max Hold”, “Min Hold”, “Video Avg”,
“Power Avg” and “Freeze”. If search more than two traces as result, it will be selected in sequence of
trace number 1, 2, 3 accordingly.
9.9. Readout
Set the readout type for X-axis. You can set different type for each marker, which just change the
reading mode, not actural value. This setting will influence the marker readout shown in active area
and upper right of screen.
1. Frequency
In this type, Normal marker shows the absolute frequency, and the other types (Delta, Delta Pair
and Span Pair) show the frequency difference between the Delta Marker and Reference Marker.
In non-zero span mode, default readout type is Frequency.
2. Period
In this type, Normal marker shows the reciprocal value of frequency, and the other types (Delta,
Delta Pair and Span Pair) show the reciprocal value of frequency difference between the Delta
Marker and Reference Marker. When the frequency difference is zero, the displayed value is
inifite and shown as 10Ts. This readout type is invalid in Zero span mode.
3. △Time
In this type, Normal marker shows the time difference between the marker and sweep start, and
the other types (Delta, Delta Pair and Span Pair) show the sweep time difference between the
Delta Marker and Reference Marker. In Zero span mode, the default readout type is Time.
4. 1/△time
In this type, the analyzer shows the reciprocal value of time difference between the Delta Marker
and Reference Marker. When the sweep time difference is zero, the displayed value is inifite
and shown as 100THz. This readout type is only available when Delta Marker selected under
Zero span mode, applicable for measuring of the frequency of video signal.
9.10. Marker Fctn
Set special measuring functions of marker such as Noise Marker, N dB BW and Frequency Count.
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