Operation
11.
Decrease the span to 300 MHz in the
Spectrum display. Now the acquisitions
are real time again.
12.
Check the status bar readout to verify
that the acquisition is real-time.
Both of the displays can run now.
Preselectors for
fi
lter bypass
In the
Setup
>
Acquire
control panel there is a preselector setting on the Advanced tab that enables you to set the state
to control image suppression. Two methods of preselection are used in the RSA7100: a
fi
xed low-pass
fi
lter (LPF) and
a tunable bandpass
fi
lter (BPF). Due to the narrow-band nature of the tuned BPF, it is necessary to bypass this
fi
lter for
wideband analysis of signals with bandwidth >50 MHz. The tuned BPF preselector is enabled depending on the acquisition
mode (swept or real-time), frequency range, and user selection of preselector state (Auto, On, Off). The LPF preselector is
naturally wideband, so that
fi
lter is always present, even when the preselector Off mode is manually selected.
1.
Click
Setup
>
Acquire
on the main menu
to open the Acquire control panel.
2.
Select the Advanced tab and choose a
preselector state.
RSA7100 Series Quick Start User Manual
73
