R&S FS300
Spectrum Analyzer
Operating manual, 02/2006
6-129
E-1007.9900.15
6.2.4.4.2
Setting the Sweep Time
Use
The sweep time is the time taken by the resolution filter set to a specific band-
width (RBW) to sweep a particular frequency range or span.
In the default setting, the sweep time is coupled to the span (SPAN), the
resolution bandwidth (RBW) and the video filter (VBW).
Setting the sweep
time manually
1.
Press the
function key
in the
submenu
.
An entry field containing the current setting is displayed. The default set-
ting is 15.5 ms. The default setting is at SPAN = 1 GHz and
RBW = 300 kHz: 137.833 ms
RBW = 1 MHz: 24.825 ms
2.
Enter a new value ( 5-60).
The entry range for the sweep time is:
0 ms
≤
Sweep Time
≤
10 ms
3.
Press the
ENTER key
The new setting is saved and the new sweep time activated.
Activating
automatic sweep
time setting
•
Press the
function key
in the
submenu
.
The sweep time is coupled to the span, the resolution bandwidth (RBW)
and the video bandwidth (VBW). The sweep time is automatically ad-
justed if either the span, the RBW or the VBW are changed.
The R&S FS300 always selects the shortest possible sweep time consis-
tent with valid results. The maximum level error trade-off for a longer
sweep time is < 0.1 dB. If you do not want the additional bandwidth and
level error, set the sweep time manually to three times the suggested
value ( above).
Summary of Contents for FS300
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