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54 Chapter2
Instrument Functions: A - L
AMPLITUDE / Y Scale
Instrument Functions: A - L
Remote Command:
:DISPlay:WINDow[1]:TRACe:Y:[SCALe]:SPACing LINear|LOGarithmic
:DISPlay:WINDow[1]:TRACe:Y:[SCALe]:SPACing?
Example: DISP:WIND:TRAC:Y:SPAC LOG
DISP:WIND:TRAC:Y:SPAC?
2.0.5 Presel Center
Adjusts the centering of the preselector filter to optimize the amplitude accuracy at the
active marker frequency. If no marker is on when Presel Center is pressed, the analyzer
turns on the currently selected marker and places it on the peak signal. If a marker is
already enabled, it must be placed at the signal peak before activating this function. Presel
Center
only functions when measuring signals ≥2.85 GHz in band 1 and higher bands. (The
instrument is in band 1, or higher, when the stop frequency is >3 GHz.)
NOTE If the signal is noise-like, the algorithm will not function properly.
For analyzers with a frequency range greater than 26.5 GHz, there are two preselectors
(microwave band and millimeter bands). To create an adjustment value for both, the user
must setup and request a
Presel Center in a microwave band, then set up and request a
Presel Center in a millimeter band.
With
Input Mixer (Ext) selected and the Mixer Type set to Presel (preselected), Presel Center
adjusts the frequency of the external preselector filter to maximize the amplitude at the
active marker frequency.
Key Path:
AMPLITUDE / Y Scale
Remote Command:
[:SENSe]:POWer[:RF]:PCENter
Remote Command Notes: This command has no effect if it is invoked in a non-preselected
band, or the active marker is less than 3 GHz.
Example: POW:PCEN