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Common Measurement Functions
FREQ Channel
The following table shows the Center Frequency Presets for modes other than Spectrum Analyzer:
RF Center Freq
SCPI command for specifying the RF Center Frequency. This command will set the Center Frequency to
be used when the RF input is selected, even if the RF input is not the input that is selected at the time the
command is sent. Note that the
Center Freq function in the Frequency menu on the front panel always
applies to the currently selected input.
Mode CF Preset for RF
WCDMA 1 GHz
WIMAXOFDMA, 1 GHz
BASIC 1 GHz
ADEMOD 1 GHz
VSA 1 GHz
TDSCDMA 1 GHz
PNOISE 1 GHz
LTE 1 GHz
LTETDD 1 GHz
MSR 1 GHz
GSM 935.2 MHz
NFIGURE 1.505 GHz
Scope: Meas Global
Remote Command: [:SENSe]:FREQuency:RF:CENTer <freq>
[:SENSe]:FREQuency:RF:CENTer?
Example: FREQ:RF:CENT 30 MHz
Notes: This command is the same in all modes, but the parameter is Measurement
Global. So the value is independent in each mode and common across all the
measurements in the mode.
Dependencies: If the electronic/soft attenuator is enabled, any attempt to set Center
Frequency such that the Stop Frequency would be >3.6 GHz 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.
If Source Mode is set to Tracking, and the Max or Min Center Freq is
therefore limited by the limits of the source, a warning message is generated,
“Data out of range;clipped to source max/min” if these limits are exceeded.
Note that for an external source, these limits can be affected by the settings of
Source Numerator, Source Denominator and Power Sweep.