RIGOL DSA1030 - Manual (Page 47)

RIGOL
Quick Guide for DSA1000 Series 33
5. Setup Span
(1) Press SPAN, a corresponding menu will appear on the screen, and
Span is in high-bright state, meanwhile, also the span parameter is
shown at the top left corner of the display gird, which indicates Span is
active.
(2) Span value could be changed through the numerical keyboard, the knob
or the directional keys.
(3) Input 20 and select MHz as its unit using the numerical keyboard, then
the span of analyzer is set to 20 MHz.
6. Setup Amplitude
(1) Press AMPT, Ref Level is in high-bright state, the reference level will
be shown at the top left corner of the display gird, which indicates
Reference Level is active.
(2) Reference level could be changed through the numerical keyboard, the
knob or the directional keys.
(3) If necessary, you can change the reference level using the knob so as to
bring the signal peak value near the top of the grid based on the signal
display.
When all the steps above are finished, a 50 MHz RF curve will be shown on the
analyzer.
7. Read Results
The value of frequency and amplitude could be read from the Marker. Press
Marker  Select Mkr  1 to activate Marker 1 and set the marker
frequency to “50 MHz”, then the frequency and amplitude of where the
marker is located would be shown at the upper right of the display grid.