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 instrument.
Note that the start and stop frequencies also step by the CF Step value.
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Remote Command |
[:SENSe]:FREQuency:CENTer:STEP[:INCRement] <freq> [:SENSe]:FREQuency:CENTer:STEP[:INCRement]? |
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Example |
Increase the current center frequency value by 500 MHz: :FREQ:CENT:STEP 500 MHz :FREQ:CENT UP |
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Notes |
Preset and Max values depend on Hardware Options |
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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 |
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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 |
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Preset |
Auto |
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State Saved |
Saved in instrument state |
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Min/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 |
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Status Bits/OPC dependencies |
non-overlapped |
Auto Function
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Remote Command |
[:SENSe]:FREQuency:CENTer:STEP:AUTO OFF | ON | 0 | 1 [:SENSe]:FREQuency:CENTer:STEP:AUTO? |
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Example |
:FREQ:CENT:STEP:AUTO ON :FREQ:CENT:STEP:AUTO? |
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Preset |
ON |