R&S ESU Series Operating Manual page 373

R&S ESU
Table 4-8
Accuracy
High
Medium
-
At a reference level (REF LEVEL) of -10 dBm and at a tracking generator output
level of the same value the analyzer operates without overrange reserve, i.e. the
analyzer is in danger of being overloaded if a signal is applied whose amplitude is
higher than the reference line. In this case, either the message OVLD for overload
is displayed in the status line or the display range is exceeded (clipping of the trace
at the upper diagram border = Overrange).
Overloading can be avoided as follows:
• Reducing the output level of the tracking generator (SOURCE POWER,
NETWORK menu)
• Increasing the reference level (REF LEVEL, AMPT menu)
4.342
External Generator Control – Option R&S FSP-B10
Measurement accuracy levels
Enhancement Reason/Limitation
label
NOR No difference between reference setting and measurement
APX Change of the following settings:
(approximation)
• coupling (RBW, VBW, SWT)
• reference level, RF attenuation
• start or stop frequency
• output level of tracking generator
• frequency offset of tracking generator
• detector (max. peak, min. peak, sample, etc.)
Change of frequency:
• max. 625 points within the set sweep limits (corresponds to
a doubling of the span)
Aborted • more than 500 extrapolated points within the current sweep
normalization limits (in case of span doubling)
Instrument Functions
Operating Manual 1302.6163.12 - 03