R&S 1129.7246.03, Operating Manual

Page: 119 / 855

R&S ESU Instrument Functions
IF Spectrum Analysis Mode
4.88 Operating Manual 1302.6163.12 - 03
NEXT MIN
RIGHT The NEXT MIN RIGHT softkey sets the active marker/delta marker to the next
higher minimum value to the right of the current marker position on the correspond-
ing trace.
For further information refer to the descriptions in section “Receiver Mode” – “NEXT
MIN RIGHT” on page 4.68 .
NEXT MIN
LEFT
The NEXT MIN LEFT softkey sets the active marker/delta marker to the next higher
minimum value to the left of the current marker positionon the corresponding trace.
For further information refer to the descriptions in section “Receiver Mode” – “NEXT
MIN LEFT” on page 4.68 .
PEAK
EXCURSION The PEAK EXCURSION softkey enables – for level measurements – the entry of a
minimum level value by which a signal must rise or fall so that it will be identified as
a maximum or a minimum by the
NEXT PEAK and NEXT MIN search functions.
Valid entries are from 0 dB to 80 dB; the resolution is 0.1 dB.
Remote command:
CALC:MARK:PEXC 10dB
The default setting for the peak excursion is 6 dB. This value is sufficient for the
NEXT PEAK and NEXT MIN functions since, in this mode, the next lower maximum
or next higher minimum will always be detected.
If NEXT PEAK LEFT or NEXT PEAK RIGHT is selected, these functions search for
the next relative maximum left or right of the current marker position irrespective of
the current signal amplitude.
Relative maximum is understood to mean a decrease
of the signal amplitude by a defined value – i.e. the peak excursion – right and left of
the amplitude peak.
The 6 dB level change set as a default value may be attained already by the inher-
ent noise of the instrument. In such a case, the R&S ESU would identify noise peaks
as maxima or minima. The value entered for the
PEAK EXCURSION should there-
fore be higher than the difference between the highest and the lowest value mea-
sured for the displayed inherent noise.
Example:
The following example illustrates the effect of different settings of the PEAK
EXCURSION .