Keysight M9421A - CF Step

3 WLAN Mode
3.6 Modulation Analysis Measurement
Max Depends on instrument maximum center frequency
Same as Center Frequency
CF Step
Changes the step size for the center frequency and start and stop frequency
functions. Once a step size has been selected and the center frequency function is
active, the step keys (and the UP|DOWN parameters for Center Frequency from
remote commands) change the center frequency by the step-size value. The step
size function is useful for finding harmonics and sidebands beyond the current
frequency span of the analyzer.
Note that the start and stop frequencies also step by the CF Step value.
It could be called Freq Step, but since Start and Stop are rarely stepped, the legacy
name “CF Step” best describes the control’s main use.
Remote Command
[:SENSe]:FREQuency:CENTer:STEP[:INCRement] <freq>
[:SENSe]:FREQuency:CENTer:STEP[:INCRement]?
Example
:FREQ:CENT:STEP 500 MHz
:FREQ:CENT UP
increases the current center frequency value by 500 MHz
:FREQ:CENT:STEP?
Notes Preset and Max values are depending on Hardware Options (503, 507, 508, 513, 526)
Preset and Max values are dependent on Hardware Options (5xx)
Dependencies Span, RBW, Center frequency
If the electronic/soft attenuator is enabled, any attempt to change the value of the center frequency
>3.6 GHz by pressing the Up-arrow key, fails and results in an advisory message. If the equivalent
SCPI command is sent, this same message is generated as part of a “-221, Settings conflict” warning
Couplings When auto-coupled in a non-zero span, the center frequency step size is set to 10% of the span.
When auto-coupled in zero span, the center frequency step size is set to the equivalent -3 dB RBW
value
Preset Auto
State Saved Saved in instrument state
Min – (the maximum frequency of the instrument). That is, 27 GHz max freq instrument has a CF step
range of +/- 27 GHz. Note that this is the maximum frequency given the current settings of the
instrument, so in External Mixing, for example, it is the maximum frequency of the current mixer band
Max The maximum frequency of the instrument. That is, 27 GHz max freq instrument has a CF step range of
+/- 27 GHz. Note that this is the maximum frequency given the current settings of the instrument, so
in External Mixing, for example, it is the maximum frequency of the current mixer band
Remote
Command
[:SENSe]:FREQuency:CENTer:STEP:AUTO OFF | ON | 0 | 1
[:SENSe]:FREQuency:CENTer:STEP:AUTO?
957 WLAN Mode User's &Programmer's Reference