User Manual

The Spectrum Application (RF Measurements)
R&S
®
FPL1000
324User Manual 1178.3370.02 ─ 09
If "Auto" is selected, the resolution bandwidth is coupled to the selected span (for span
> 0). If the span is changed, the resolution bandwidth is automatically adjusted.
If the resolution bandwidth is defined manually, a green bullet is displayed next to the
"RBW" display in the channel bar.
For more information see Chapter 7.6.1.1, "Separating Signals by Selecting an Appro-
priate Resolution Bandwidth", on page 317.
Note: Restrictions.
●
For EMI measurements using the quasipeak detector, the 1 MHz RBW filter is not
available (see "Resolution Bandwidth and Filter Types" on page 253).
Remote command:
[SENSe:]BANDwidth[:RESolution] on page 769
[SENSe:]BANDwidth[:RESolution]:AUTO on page 769
VBW
Defines the video bandwidth automatically or manually.
For more information see Chapter 7.6.1.2, "Smoothing the Trace Using the Video
Bandwidth", on page 318.
"Auto"
The video bandwidth is coupled to the resolution bandwidth. If the
resolution bandwidth is changed, the video bandwidth is automatically
adjusted.
"Manual"
For manual mode, define the bandwidth value. The available video
bandwidths are specified in the data sheet. Numeric input is always
rounded to the nearest possible bandwidth.
If the video bandwidth is defined manually, a green bullet is displayed
next to the "VBW" display in the channel bar.
Remote command:
[SENSe:]BANDwidth:VIDeo:AUTO on page 771
[SENSe:]BANDwidth:VIDeo on page 771
Sweep Time
Defines the duration of a single sweep, during which the defined number of sweep
points are measured. The "Sweep Time" can be defined automatically or manually.
The allowed "Sweep Time"s depend on the device model; refer to the data sheet.
For more information see Chapter 7.6.1.7, "How Long the Data is Measured: Sweep
Time", on page 320.
Note: The "Sweep Time" only indicates how long data is captured; the time required to
process the captured data may be considerably longer, in particular for FFT mode. For
FFT mode, an estimated duration is indicated behind the "Sweep Time" in the channel
bar (for RF measurements only).
"Auto"
The "Sweep Time" is coupled to the span (not zero span), video
bandwidth (VBW) and resolution bandwidth (RBW). If the span, reso-
lution bandwidth or video bandwidth is changed, the "Sweep Time" is
automatically adjusted.
Bandwidth, Filter and Sweep Configuration