User manual

Chapter 2 Front Panel Operation RIGOL
User’s Guide for DSA700 Series
2-3
Center Freq
Set the center frequency of the current channel. Press this key to switch to center
frequency/span input mode. The center frequency and span values are displayed
at the lower left and right sides of the grid respectively.
Key Points:
 The start and stop frequencies vary with the center frequency when the span
is constant.
 Changing the center frequency horizontally shifts the current channel and the
adjustment is limited by the specified frequency range.
 In Zero Span mode, the start frequency, stop frequency and center frequency
are always the same. If one is changed, the others are updated to match.
 You can modify this parameter using the numeric keys, knob or direction keys.
Refer to "Parameter Setting" for more details.
Start Freq
Set the start frequency of the current channel. Press this key to switch to
start/stop frequency input mode. The start and stop frequencies are displayed at
the lower left and right sides of the grid respectively.
Key Points:
 The span and center frequency vary with the start frequency. The change of
span would affect other system parameters. For more details, please refer to
"Span".
 In Zero Span mode, the start frequency, stop frequency and center frequency
are always the same. If one is changed, the others are updated to match.
 You can modify this parameter using the numeric keys, knob or direction keys.
Refer to "Parameter Setting" for more details.