Chapter 4 Functions of the Front Panel of EMI
RIGOL
RSA3000E User Guide
4-3
Midspan Freq
Sets the center frequency of the current channel.
Remarks:
When you modify the midspan frequency, the start and stop frequency will be
modified automatically if the span remains to be unchanged.
Modifying the midspan frequency indicates that the frequency is changed along
the current channel horizontally, and the adjustable range should be within the
frequency range specified in the technical specifications of the analyzer.
You can use the numeric keys, the knob, or arrow keys to modify this parameter;
you can also use the touch screen to modify the parameter.
Table 4-2 Midspan Freq
Parameter
Remarks
Default
515 MHz
Range
5 Hz to (Fmax - 5 Hz)
Unit
GHz, MHz, kHz, Hz
Knob Step
step = RBW (meter)/2
Left/Right Arrow Key Step
Up/Down Arrow Key Step
step = RBW (meter)*10
Start Freq
Sets the start frequency of the current frequency channel.
Remarks:
When you modify the start frequency, the span and midspan frequency will be
changed.
You can use the numeric keys, the knob, or arrow keys to modify this parameter;
you can also use the touch screen to modify the parameter.
Table 4-3 Start Frequency
Parameter
Remarks
Default
midspan frequency - span/2
Range
0 Hz to (Fmax – 10 Hz)
Unit
GHz, MHz, kHz, Hz
Knob Step
step = RBW (meter)/2
Left/Right Arrow Key Step
Up/Down Arrow Key Step
step = RBW (meter)*10
