R&S ESR Series User Manual

Spectrum Measurements
R&S
®
ESR
359User Manual 1175.7068.02 ─ 12
In frequency sweep mode, the analyzer provides several possible methods of sweep-
ing:
●
"Sweep" on page 359
●
"FFT" on page 359 (not available with 5-Pole filters, channel filters or RRC filters,
see Chapter 6.2.6.3, "Selecting the Appropriate Filter Type", on page 366)
●
"Auto" on page 359
Sweep ← Sweep Type
Sets the Sweep Type to standard analog frequency sweep.
In the standard sweep mode, the local oscillator is set to provide the spectrum quasi
analog from the start to the stop frequency.
Remote command:
SWE:TYPE SWE, see [SENSe:]SWEep:TYPE on page 835
FFT ← Sweep Type
Sets the Sweep Type to FFT mode.
The FFT sweep mode samples on a defined frequency value and transforms it to the
spectrum by fast Fourier transformation (FFT).
FFT is not available when using 5-Pole filters, Channel filters or RRC filters. In this
case, sweep mode is used.
Remote command:
SWE:TYPE FFT, see [SENSe:]SWEep:TYPE on page 835
Auto ← Sweep Type
Automatically sets the fastest available Sweep Type for the current measurement. Auto
mode is set by default.
Remote command:
SWE:TYPE AUTO, see [SENSe:]SWEep:TYPE on page 835
FFT Filter Mode ← Sweep Type
Defines the filter mode to be used for FFT filters by defining the partial span size. The
partial span is the span which is covered by one FFT analysis.
Auto ← FFT Filter Mode ← Sweep Type
The firmware determines whether to use wide or narrow filters to obtain the best mea-
surement results.
Remote command:
[SENSe:]BANDwidth|BWIDth[:RESolution]:FFT on page 831
Narrow ← FFT Filter Mode ← Sweep Type
For an RBW ≤ 10kHz, the FFT filters with the smaller partial span are used. This allows
you to perform measurements near a carrier with a reduced reference level due to a
narrower analog prefilter.
Remote command:
[SENSe:]BANDwidth|BWIDth[:RESolution]:FFT on page 831
Configuration

R&S ESR Series Specifications

General

Brand	R&S
Model	ESR Series
Category	Receiver
Language	English