Rohde & Schwarz ZNL Series, User Manual

Page: 52 / 240

Configuration
R&S
®
ZNL
52 User Manual 1178.5989.02 ─ 06
Advanced FFT mode / Basic Settings ..........................................................................53
└ TransformationAlgorithm ................................................................................53
└ FFT Length .................................................................................................... 54
└ Window Function ........................................................................................... 54
└ Window Overlap .............................................................................................54
└ Window Length .............................................................................................. 54
Sample Rate
Defines the I/Q data sample rate of the R&S ZNL. This value is dependent on the
defined Analysis Bandwidth and the defined signal source.
sample rate = analysis bandwidth / 0.8
For details on the dependencies see Chapter 4.1.1, "Sample Rate and Maximum Usa-
ble I/Q Bandwidth for RF Input" , on page 18.
Remote command:
TRACe:IQ:SRATe
on page 139
Analysis Bandwidth
Defines the flat, usable bandwidth of the final I/Q data. This value is dependent on the
defined
Sample Rate and the defined signal source.
analysis bandwidth = 0.8 * sample rate
Remote command:
TRACe:IQ:BWIDth
on page 137
Meas Time
Defines the I/Q acquisition time. By default, the measurement time is calculated as the
number of I/Q samples ( "Record Length" ) divided by the sample rate. If you change
the measurement time, the
Record Length is automatically changed, as well.
Remote command:
[SENSe<n>:]SWEep:TIME
on page 155
Record Length
Defines the number of I/Q samples to record. By default, the number of sweep points is
used. The record length is calculated as the measurement time multiplied by the sam-
ple rate. If you change the record length, the
Meas Time is automatically changed, as
well.
Note: For the I/Q vector result display, the number of I/Q samples to record ( "Record
Length" ) must be identical to the number of trace points to be displayed ("Sweep
Points"). Thus, the sweep points are not editable for this result display. If the "Record
Length" is edited, the sweep points are adapted automatically.
Remote command:
TRACe:IQ:RLENgth
on page 137
TRACe:IQ:SET
on page 138
Swap I/Q
Activates or deactivates the inverted I/Q modulation. If the I and Q parts of the signal
from the DUT are interchanged, the R&S
ZNL can do the same to compensate for it.
Data Acquisition and Bandwidth Settings