3 Short-Range Comms & IoT Mode
3.12 Monitor Spectrum Measurement
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"Center Frequency Presets" on page 1690
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"VXT Models with Radio Heads/CIU Frequency Range" on page 1692
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"RF Center Freq" on page 1692
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"Ext Mix Center Freq" on page 1693
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"I/Q Center Freq" on page 1693
Remote
Command
[:SENSe]:FREQuency:CENTer <freq>
[:SENSe]:FREQuency:CENTer?
Example
:FREQ:CENT 50 MHz
Sets Center Frequency to 50 MHz
:FREQ:CENT UP
Increments the Center Frequency by the value of CF Step
:FREQ:CENT?
Returns the current value of Center Frequency
Notes Sets the RF, External Mixing or I/Q Center Frequency depending on the selected input:
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For RF input it is equivalent to :FREQ:RF:CENT
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For I/Q input it is equivalent to :FREQ:IQ:CENT
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For External Mixer it is equivalent to :FREQ:EMIX:CENT
Preset and Max values are dependent on Hardware Options (5xx)
If no terminator (for example, MHz) is sent, the terminator Hz is used. If a terminator with unit other
than Frequency is used, an invalid suffix error message is generated
Couplings In LTEAFDD/LTEATDD and 5GNR Modes:
Center Frequency, Center Frequency Offset and Carrier Reference Frequency are coupled with the
following equation:
Center Frequency = Carrier Reference Frequency + Center Frequency Offset
If the following conditions are satisfied at the same time:
–
the Num Component Carrier equals to 1
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the Center Frequency Offset equals to 0 Hz
–
the mode of the Center Frequency is Auto
The Center Frequency is equivalent to Carrier Reference Frequency
The major purpose of this coupling is to keep BWCC with legacy LTE, in which
:SENSe:FREQuency:CENTer is used to set up the Frequency of the measurement
Otherwise, the Center Frequency Offset is changed following the Center Frequency and the Carrier
Reference Frequency keeps intact
1688 Short Range Comms & IoT Mode User's &Programmer's Reference
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