Operation
Preselector states.
The following table describes each preselector state so that you can determine which one you want to use.
Preselector setting
Description
Auto
This setting balances maximizing acquisition bandwidth with image suppression.
The analyzer will operate up to its maximum acquisition bandwidth and may
turn off the uWave preselector to accommodate this. When the requested span
exceeds the acquisition bandwidth, the uWave preselector is engaged and the
step size used is 50 MHz/step.
This is the default setting.
On
This setting sets the preselector to always be on, independent of span. When the
span exceeds 50 MHz, the instrument is stepped in frequency to create the display.
Off
This setting bypasses the preselector
fi
lters (except for the LPF, which is always
present) when the span is greater than the allowed acquisition bandwidth. The
maximum available real time span is equal to the maximum available acquisition
bandwidth at the selected frequency. When the span of the analysis exceeds
the available acquisition bandwidth for the selected frequency, the step size of
the sweep is set to 320 MHz.
Preselector states by acquisition mode.
The following shows preselector states by acquisition mode to help you choose a state.
Acquisition mode
Auto
On
Off
Swept, 50 MHz steps
On
On
CF
≤
3.6 GHz: On
CF > 3.6 GHz: Off
Swept, 320 MHz steps
Not applicable
Not applicable
CF
≤
3.41 GHz: On
CF > 3.41 GHz: Off
Real time span
≤
50 MHz
On
On
CF
≤
3.6 GHz: On
CF > 3.6 GHz: Off
Real time span > 50 MHz
CF
≤
3.41 GHz: On
CF > 3.41 GHz: Off
Not applicable
CF
≤
3.41 GHz: On
CF > 3.41 GHz: Off
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RSA7100 Series Quick Start User Manual
