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reading unit according to the X-axis scale.
Frequency: When this type of reading is selected, "Normal" and "Fixed "cursor shows the absolute
frequency.
"Difference" cursor shows the frequency difference of difference cursor with respect to the reference
cursor. In non-zero span mode, the default reading method is "Frequency".
Period: When this type of reading is selected, "Normal" and "Fixed "cursor shows the reciprocal of the
cursor frequency.
"Difference" cursor shows the reciprocal of the frequency difference. When the frequency difference is
zero, then the reciprocal will be infinite and the reading show as "---".
Time: When this type of reading is selected, "Normal" and "Fixed "cursor shows the time difference
between the cursor and sweep start.
"Difference" cursor shows the sweep time difference between the difference cursor and reference
cursor. In zero span mode, the default reading method is "Time".
Inverse Time: When this type of reading is selected, it shows the reciprocal of the sweep time
difference between the difference cursor and reference cursor. When the time difference is zero, then
the reciprocal will be infinite and the reading show as "---".
2. X-Axis Scale (Man/Auto): When X-axis scale is automatic, the sweep span is in zero span mode, and
marker reading will change to "Time" automatically.
3. Lines (Off/On): turn on/off the mark line.
When the mark line is turned on, the crossover line is displayed at the amplitude point indicated by the
cursor, and the width of the horizontal line and the height of the vertical line are consistent with the
length and height of the grid in the waveform display area.
If the cursor is not in the visible area, then extend the mark line to the display area. This function is
useful for cursors outside the display area, the cursor extension line indicates the amplitude of the
cursor, for observing the comparison.
Marker Function: Mark noise, power in-band and density in-band, N dB bandwidth point and frequency
meter, frequency meter thresholds.
1. Mark Noise: Performing mark noise for the selected cursor, and then reads the normalized noise
power density value at the cursor.
If the current selected cursor is off in the Marker menu, press "Mark Noise" is automatically turned on
to the "Normal" type. Then measuring the average noise level of frequency point at the cursor and
normalized to the 1Hz bandwidth. Meanwhile, compensating for different detection methods and trace
types. When using "RMS average" or "sampling" method, the noise cursor measurement is more
accurate.
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