5Key Reference
106 N9342C/43C/44C User’s Guide
Delta Pair
Key access: [MARKER] > {Mode}
Enters a mode that allows adjustment of both the
Ref (start) and Delta (stop) markers independently.
Pressing Delta Pair, toggles between the reference
and delta markers. The start marker number is
indicated with a number and an R above the
marker (for example, 1R) and the delta marker is
indicated with a marker number. This mode is
useful in functions such as Band Power.
Span Pair
Key access: [MARKER] > {Mode}
Enters a mode that allows adjustment of both the
ref and delta markers. Pressing Span Pair, toggles
between the span and center markers. The start
marker number is indicated with a number and an
R above the marker (for example, 1R) and the stop
marker is indicated with a marker number.
Adjusting the span changes the frequency
difference between the two markers while
maintaining the midpoint between the two markers
at a fixed frequency. Changing the center changes
the center point between the two markers while
maintaining the frequency difference. This mode is
useful in functions such as Band Power.
Off
Key access: [MARKER] > {Mode}
NOTE
The delta marker function permits signal-to-noise
measurements provided the signal is a single spectral
component. Place a normal marker on the signal, press Delta,
place the delta marker in the noise, and activate Marker
Noise. The indicated amplitude indicates signal-to-noise/Hz.
NOTE
Ref and Delta markers maintain their displayed x-axis location,
but not their frequency values when you change a parameter
that redefines the x-axis scale. Reset these markers when
parameters such as Span or Center Freq are changed.
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