R&S ESR Series, User Manual

Page: 367 / 1126

Spectrum Measurements
R&S
®
ESR
364 User Manual 1175.7068.02 ─ 12
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
Coupling Ratio
Opens a submenu to select the coupling ratios for functions coupled to the bandwidth.
RBW/VBW Sine [1/1] ← Coupling Ratio
Sets the following coupling ratio:
"video bandwidth = resolution bandwidth"
This is the default setting for the coupling ratio resolution bandwidth/video bandwidth.
This is the coupling ratio recommended if sinusoidal signals are to be measured.
This setting takes effect if you define the video bandwidth automatically ( Video BW
Auto ).
Remote command:
BAND:VID:RAT 1
, see
[SENSe:]BANDwidth|BWIDth:VIDeo:RATio
on page 832
RBW/VBW Pulse [.1] ← Coupling Ratio
Sets the following coupling ratio:
"video bandwidth = 10 × resolution bandwidth or"
"video bandwidth = 10 MHz (= max. VBW)."
This coupling ratio is recommended whenever the amplitudes of pulsed signals are to
be measured correctly. The IF filter is exclusively responsible for pulse shaping. No
additional evaluation is performed by the video filter.
This setting takes effect if you define the video bandwidth automatically ( Video BW
Auto ).
Remote command:
BAND:VID:RAT 10
, see
[SENSe:]BANDwidth|BWIDth:VIDeo:RATio
on page 832
RBW/VBW Noise [10] ← Coupling Ratio
Sets the following coupling ratio:
Configuration