Keysight M9421A - Center Frequency Segment1

3 WLAN Mode
3.6 Modulation Analysis Measurement
harmonic range in the Harmonic Table. The Center Freq thus presets to the point arithmetically
equidistant from these two frequencies
Note that, if the current measurement has a limited Span available to it, and cannot achieve the Span
shown in the table (Span=Stop Freq – Start Freq), the analyzer uses the maximum Span the
measurement allows, and still sets the Center Freq to the midpoint of the Start and Stop Freq values in
the Harmonic Table
When Restore Input/Output Defaults is performed, the mixer presets to the 11970A, whose Start and
Stop frequencies are 26.5 and 40 GHz respectively. The center of these two frequencies is 33.25 GHz
Therefore, after a Restore Input/Output Defaults, if you go into External Mixing and do a Mode Preset
while in the Spectrum Analyzer Mode, the resulting Center Freq is 33.25 GHz
State Saved Saved in instrument state
Min The minimum frequency in the currently selected mixer band + 5 Hz
Max The maximum frequency in the currently selected mixer band - 5 Hz
If the knob or step keys are being used, also depends on the value of the other three interdependent
parameters Span, Start Frequency and Stop Frequency
I/Q Center Freq
SCPI command for specifying the I/Q Center Frequency. This command will set the
Center Frequency to be used when the I/Q input is selected, even if the I/Q input is
not the input which 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.
Remote
Command
[:SENSe]:FREQuency:IQ:CENTer <freq>
[:SENSe]:FREQuency:IQ:CENTer?
Example
:FREQ:IQ: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
Preset 0 Hz
State Saved Saved in instrument state
Min -40.049995 MHz
Max 40.049995 MHz
Center Frequency Segment1
NOTE
This key is only available when radio standard is 802.11ac/ax 80+80MHz and
when the active measurement is SEM, CHP or Modulation Analysis.
This parameter sets the center frequency of Segment 1.
955 WLAN Mode User's &Programmer's Reference