RIGOL Chapter 2 Functions of the Front Panel of GPSA
2-6 RSA3000 User Guide
CF Step Mode
The CF step mode consists of "Manual" and "Auto".
Remarks:
⚫ In Auto mode, the CF step is 1/10 of the span in non-zero span mode or equals
to RBW while in zero span mode.
⚫ In Manual mode, you can use the numeric keys to set the step size.
Freq Offset
You can set a frequency offset value to account for frequency conversions between
the device under test (DUT) and the input terminal of the spectrum analyzer.
Remarks:
⚫ The change of this parameter only changes the display values of the center
frequency, start frequency, and stop frequency; but does not affect any
hardware settings of the spectrum analyzer.
⚫ You can use the numeric keys, the knob, and the arrow keys on the front panel
to modify this parameter; also you can modify it on the touchscreen. For details,
refer to descriptions in "Parameter Setting".
⚫ To eliminate the frequency offset, you can set the frequency offset to 0 Hz.
Table 2-5 Frequency Offset
Signal Track
Enables or disables the signal tracking function. This function is used to track and
measure the signal whose frequency is unstable and whose transient variation in
amplitude is less than 3 dB. Place Marker1 (refer to descriptions in "Marker
Measurement") onto the signal under test to track and measure the variation of the
signal. The signal tracking process is shown in the following figure: