Rohde & Schwarz R&S FSP Series, Operating Manual

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R&S FSP Instrument Functions
Analyzer Mode
4.22 Operating Manual 1164.4556.12 - 06
The SWEEPTIME AUTO function is designed for detectors like sample, max peak or
average. For sweeping with the quasipeak detector a manual setting of the sweep
time should be used at any time.
Remote command:
SWE:TIME:AUTO ON
COUPLING
RATIO The COUPLING RATIO softkey opens a submenu for selection of the coupling ratios.
When the default setting is active, i.e. the COUPLING RATIO softkey is deactivated
(not highlighted), the ratio span/resolution bandwidth (SPAN/RBW) is 50 (this corre-
sponds to SPAN / RBW AUTO [50]) and the ratio resolution bandwidth/video band-
width (RBW/VBW) is 0.33 (this corresponds to RBW / VBW SINE [1/3]).
If the ratio RBW/VBW or SPAN/RBW is different from the default setting, the COU-
PLING RATIO softkey is highlighted.
The softkeys RBW/VBW... are selection keys. Only one softkey can be enabled at
any one time. The softkeys are only effective for the VBW AUTO selection in the
main menu.
The softkeys SPAN/RBW... are also selection keys. They are only effective for the
RBW AUTO selection in the main menu.
RBW / VBW
SINE [1/3]
The RBW | VBW SINE [1/3] softkey sets the following coupling ratio:
video bandwidth = 3 × resolution bandwidth.
This is the default setting for the coupling ratio resolution bandwidth/video band-
width.
This is the coupling ratio recommended if sinusoidal signals are to be measured.
Remote command:
BAND:VID:RAT 3
This setting is only effective for the VBW AUTO selection in the main menu.
RBW / VBW
PULSE [0.1]
The RBW | VBW PULSE [0.1] softkey sets the following coupling ratio:
video bandwidth = 10 × resolution bandwidth or
video bandwidth = 10 MHz (= max. VBW).
Band A Band B Band C/D
Frequency range < 150 kHz 150 kHz to 30 MHz > 30 MHz
IF bandwidth 200 Hz 9 kHz 120 kHz
Frequency scan rate 20 s/kHz 200 s/MHz 20 s/MHz
RBW / VBW SINE [1/3]
RBW / VBW PULSE [0.1]
RBW / VBW NOISE [10]
RBW / VBW MANUAL
SPAN / RBW AUTO [50]
SPAN / RBW MANUAL