3 Spectrum Analyzer Mode
3.2 Swept SA Measurement
–
the selected marker becomes a Delta marker
–
If the marker’s reference marker is off, it is turned on as a Fixed marker at the
selected marker’s X Axis value on the selected marker’s trace and takes on the
selected marker’s X Axis value and Y-axis result. The reference marker’s Trace
attribute (including Auto, if on) becomes that of the selected marker. Note that if
a marker function was on, the result that the reference marker then takes on is
that of the function
–
If the marker’s reference marker was already on, it is unaffected
–
If the selected marker was already in Delta mode: the reference marker is moved
(even if Fixed), to the selected marker’s trace at its X Axis value. The reference
marker’s Trace attribute (including Auto, if on) becomes that of the selected
marker
When an X Axis value is entered, or set using the knob or step keys, the marker
moves, relative to its reference marker, to the trace point nearest to that value. The
value is retained in all its precision whether it is at the center of a trace point or not,
and future increments are applied to that value.
Fixed markers
If the selected marker was Off, it is placed at the center of the screen on the trace
specified by the marker’s trace attribute (although subsequent sweeps will not
affect its amplitude).
A Fixed marker is fixed in the sense that it does not follow the trace. You can directly
move it in both X and Y directions, and it can also be indirectly moved. In the latter
case, once it moves, it again becomes Fixed at the X Axis point it moved to and with
the Y-axis result it took on when it moved there.
If a Normal or Delta marker is changed to Fixed, it becomes fixed at the X Axis point
it was at and with the Y-axis result it had when it was set to Fixed.
When a Y Axis value is entered, or set using the knob or step keys, the marker moves
vertically to the amplitude specified. When an X Axis value is entered, or set using
the knob or step keys, the marker moves to the trace point nearest to that X Axis
value. The value is retained in all its precision whether it is at the center of a trace
point or not, and future increments are applied to that value. However, the Y Axis
value of the marker does not take on that of the trace.
Delta Marker (Reset Delta)
Pressing this button has the same effect as pressing the Delta selection in "Marker
Mode" on page 314. The selected marker becomes a Delta marker. If the selected
marker is already a Delta marker, the reference marker is moved to the current
position of the selected marker, thus resetting the delta to zero.
Spectrum Analyzer Mode User's &Programmer's Reference 317
To Next Page
Loading...
Need help?
General
