3 Short-Range Comms & IoT Mode
3.12 Monitor Spectrum Measurement
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Compatibility
Notes
:SYST:PRES no longer turns on :DISPlay:ENABle as it did in legacy analyzers
3.12.6 Frequency
Opens the Frequency menu, which contains controls that allow you to control the
Frequency and Channel parameters of the instrument.
Some features in this menu are the same for all measurements in the current Mode
– they do not change as you change measurements. Settings like these are called
“Meas Global” and are unaffected by Meas Preset. For example, the Center Freq
setting is the same for all measurements - it does not change as you change
measurements.
3.12.6.1 Settings
The Settings tab contains the basic Bandwidth functions. In most measurements it
is the only tab under Bandwidth.
Center Frequency
Sets the frequency that corresponds to the horizontal center of the graticule. While
adjusting the Center Frequency the Span is held constant.
The center frequency setting is the same for all measurements within a mode, that
is, it is Meas Global. Some modes are also able to share a Mode Global center
frequency value. If this is the case, the Mode will have a Global tab in its Meas Setup
menu.
The Center Freq function sets (and queries) the Center Frequency for the currently
selected input. If your instrument has multiple inputs, and you select another input,
the Center Freq changes to the value for that input. SCPI commands are available to
directly set the Center Freq for a specific input.
Center Freq is remembered as you go from input to input. Thus, you can set a
Center Freq of 10 GHz with the RF Input selected, change to BBIQ, and set a Center
Freq of 20 MHz, then switch to External Mixing and set a Center Freq of 60 GHz, and
when you go back to the RF Input the Center Freq will go back to 10 GHz; back to
BBIQ and it is 20 MHz; back to External Mixing and it is 60 GHz.
See:
Short Range Comms & IoT Mode User's &Programmer's Reference 1687
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