RIGOL DSA875 - Manual (Page 58)

RIGOL Chapter 2 Front Panel Operation
User’s Guide for DSA800 Series 2-6
CF Step
Set the step of center frequency. Changing the center frequency in a fixed step
continuously switches the channel to be measured.
Key Points:
 The CF step can be set in “Manual” or “Auto” mode. In Auto mode, the CF step
is 1/10 of the span in Non-zero span mode or equals the RBW while in Zero
span mode; in Manual mode, you can set the step using the numeric keys.
 After you set an appropriate CF step and select Center Freq, use the up and
down direction keys to switch between measurement channels in a specified
step in order to sweep the adjacent channel manually.
 You can modify this parameter using the numeric keys, knob or direction keys.
For more details, please refer to “Parameter Setting”.
Table 2-5 CF Step
Parameter Explanation
Default 750 MHz
Range 1 Hz to 7.5 GHz
Unit GHz, MHz, kHz, Hz
Knob Step Span > 0, step = Span/200
Span = 0, step = 100 Hz
Min = 1 Hz
Direction Key Step in 1, 2, 5 sequence
Signal Track
Turn on or off signal track. This function is used to track and measure signal with
unstable frequency and less than 3 dB transient variation in amplitude. Place
Marker1 (see “Marker Measurements”) onto the signal under measurement to
track and measure the variation of the signal continuously.
The signal track process is as shown in the figure below: