3 Short-Range Comms & IoT Mode
3.7 ACP Measurement
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.
Remote Command
[:SENSe]:FREQuency:CENTer:STEP[:INCRement] <freq>
[:SENSe]:FREQuency:CENTer:STEP[:INCRement]?
Example Increase the current center frequency value by 500 MHz:
:FREQ:CENT:STEP 500 MHz
:FREQ:CENT UP
Notes Preset and Max values depend on Hardware Options
Dependencies 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
Not available in MSR, LTEAFDD, LTEATDD and 5G NR Modes
Couplings When auto-coupled, the center frequency step size is set to 10% of the span
Preset Auto
State Saved Saved in instrument state
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
Status Bits/OPC
dependencies
non-overlapped
Auto Function
Remote
Command
[:SENSe]:FREQuency:CENTer:STEP:AUTO OFF | ON | 0 | 1
[:SENSe]:FREQuency:CENTer:STEP:AUTO?
Example
:FREQ:CENT:STEP:AUTO ON
:FREQ:CENT:STEP:AUTO?
Preset
ON
852 Short Range Comms & IoT Mode User's &Programmer's Reference
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