Operating Manual EMI TEST RECEIVER ESIB7 - Rohde & Schwarz

ESIB
Analyzer - Delta Markers
DELTA MKR
ABS REL
The DELTA ABS REL softkey switches between relative and absolute entry
modes for the delta-marker frequency.
In the REL position, the delta marker frequency is entered relative to the
reference marker. In this case, the entry mode for the delta-marker
frequencies is also relative.
In the ABS position, the entry of the delta-marker frequency is in terms of
absolute frequency.
The default setting is REL.
IEC/IEEE-bus command
:CALCulate:DELTamarker:MODE ABS | REL
ALL DELTA
OFF
The ALL DELTA OFF softkey switches off all active delta markers and any
associated functions (e.g. REFERENCE FIXED, PHASE NOISE).
IEC/IEEE-bus command
:CALCulate:DELTamarker:AOFF
REFERENCE
FIXED
The REFERENCE FIXED softkey enables/disables relative measurements
with respect to a fixed, measurement-curve-independent reference value.
The information in the delta-marker field on the display screen is referenced
to this fixed reference value. For the generation of the marker lists using
MARKER INFO list, the delta markers are also output relative to a fixed
reference. In the lists, the REFERENCE POINT is tagged by the number of
the reference marker (only one enabled)
When REFERENCE FIXED is enabled, the current settings of the reference
marker become the reference values. If no marker is active, MARKER 1 (with
peak search) is activated. After transferring the reference values, all markers
are deleted, and the active delta marker is set to the position of the reference
value. Additional delta markers can be switched on.
The reference value can be subsequently changed
1. by shifting it in the REFERENCE POINT sub-menu.
2. by starting a search:
In the MARKER NORMAL menu the REF POINT is handled as a reference
marker (even though it is not bound to the trace). This means, that it will be
shown as enabled and can also be changed in position. The co-ordinates
of the REF POINT are overwritten by the marker values (they lie, by
definition, on the trace). Thus, it is possible, even for an enabled
REFERENCE FIXED, to define a new reference point function with search
functions.
The REFERENCE FIXED function is particularly useful for measurements
which are performed relative to a reference signal that is not available during
the whole measurement time (e. g. harmonics measurements, see chapter
"Measurement Example").
IEC/IEEE-bus command
:CALCulate:DELTamarker:FUNCtion:FIXed ON|OFF
1088.7531.12 4.199 E-15