User manual

Mathematics
R&S
®
RTO
207User Manual 1316.0827.02 ─ 06
(Relative) Start ← Gate Definition
Defines the starting value for the gate.
SCPI command:
CALCulate:MATH<m>:FFT:GATE:ABSolute:STARt on page 584
CALCulate:MATH<m>:FFT:GATE:RELative:STARt on page 585
MEASurement<m>:GATE:ABSolute:STARt on page 572
MEASurement<m>:GATE:RELative:STARt on page 573
SEARch:GATE:ABSolute:STARt on page 633
SEARch:GATE:RELative:STARt on page 634
(Relative) Stop ← Gate Definition
Defines the end value for the gate.
SCPI command:
CALCulate:MATH<m>:FFT:GATE:ABSolute:STOP on page 584
CALCulate:MATH<m>:FFT:GATE:RELative:STOP on page 585
MEASurement<m>:GATE:ABSolute:STOP on page 572
MEASurement<m>:GATE:RELative:STOP on page 573
SEARch:GATE:ABSolute:STOP on page 633
SEARch:GATE:RELative:STOP on page 634
Record Length/RBW Coupling
The record length and resolution bandwidth are coupled during FFT analysis. If you
change one value, the other must be adapted accordingly. You can keep either value
constant, thus preventing automatic adaptation when the other parameter is changed.
However, this may cause the FFT analysis to fail.
For details see chapter 6.3.1, "Fundamentals of FFT Analysis", on page 192.
"Record length
controlled"
The record length remains constant. If not enough samples are avail-
able for the selected RBW, the RBW will be decreased.
"RBW control-
led"
The RBW is not adapted, i.e. remains as defined by the user. The
required acquisition time for this RBW is indicated. If necessary and
possible, the record length is extended to acquire the required number
of samples.
SCPI command:
CALCulate:MATH<m>:FFT:GATE:COUPling on page 582
Required acquisition time
The required acquisition time is calculated for the defined RBW value if "RBW con-
stant" is selected, and is displayed for information only. If the required acquisition time is
not available (e.g. because acquisition has already been stopped), an error message is
displayed in the "FFT Setup" tab indicating that not enough samples are available for the
defined RBW.
SCPI command:
TIMebase:RACTime on page 582
FFT Analysis