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917
Common Measurement Functions
FREQ Channel
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.
Status Bits/OPC dependencies: Non-overlapped
Initial S/W Revision: Prior to A.02.00
Modified at S/W Revision: A.03.00
Key Path:
FREQ Channel
Remote Command: [:SENSe]:FREQuency:CENTer:STEP[:INCRement] <freq>
[:SENSe]:FREQuency:CENTer:STEP[:INCRement]?
[:SENSe]:FREQuency:CENTer:STEP:AUTO OFF|ON|0|1
[:SENSe]:FREQuency:CENTer:STEP:AUTO?
Example: FREQ:CENT:STEP:AUTO ON
FREQ:CENT:STEP 500 MHz
FREQ:CENT UP increases the current center frequency value by 500 MHz
FREQ:CENT:STEP?
FREQ:CENT:STEP:AUTO?
Notes: Preset and Max values are depending on Hardware Options (503, 507, 508,
513, 526)
Notes: Preset and Max values are dependent on Hardware Options (5xx)
Dependencies: Freq Offset is not available in External Mixing. In this case the Freq Offset
key is grayed out and shows a value of zero. It will once again be available,
and show the previously set value, when you return to the RF Input.
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.