NARDA IDA, Operating Manual, Page: 192 / 292

10 Time Domain (Scope) Mode
184
IDA - 3106 Narda
10.3 Selecting measurement parameters
The parameters described in must be set to match the channel being
measured to obtain meaningful results. Fcent and CBW must be set first of
all.
The time span, time resolution, and number of measured values (n) are
linked and can be represented by the following equation:
Time span = Number of measured values (n) x Time resolution
At least 16 measured values must be displayed over the time span. This
relationship is clear from the following table.
Some examples of channels and the appropriate settings of these
parameters are also given in the section
Measurement parameter examples
on page 187.
Table 33: Measurement parameters and their functions
Parameter Function / Setting
Fcent Center frequency of channel under observation
Time Span
Time Resolution Measurement duration for capturing the signal characteristic
Time resolution for the displayed measurement values
CBW
Channel bandwidth of the signal to be displayed
Trace / Detector
The trace types / detectors that can be selected depend on the
measurement function: Act / +Peak, RMS, -Peak
Table 34: Relationship between Time Span and Time Res parameters
Sub mode Time Span Time Res No. of
values (n)
Trace / Detector
High Resolution
Scope
settable,

n / CBW
fixed,
1 / CBW
max. 250,000 Act
Long-Time
Scope
settable,
 24 h
settable,
 Time Span / n
max. 62,500 +Peak, RMS,
-Peak