Agilent Technologies X Series Manual page 246

Complex Spectrum Measurement
Meas Setup
Auto
Selects the LO (local oscillator) phase noise behavior to optimize dynamic range and speed for various
instrument operating conditions.
The X-Series has two grades of LO; a high performance LO that gives the best phase noise performance;
and a medium-performance LO that gives excellent performance.
In models with the high performance LO, Auto will choose:
Best Close in Phase
Noise
Spa 400 kHz
n
In models with the medium-performance LO, Auto will choose:
Best Close in Phase
Noise
Spa 150 kHz
n
Note that Fast Tuning will not be selected when in Auto.
Key Path
Remote Command
Example
Preset
State Saved
Initial S/W Revision
Best Close-in P Noise
The LO phase noise is optimized for smaller offsets from the carrier, at the expense of phase noise
farther out.
Key Path
Example
246
Best Wide-offset Phase
Noise
>400 kHz
Best Wide-offset Phase
Noise
>150 kHz
Meas Setup, PhNoise Opt
[:SENSe]:SPECtrum:FREQuency:SYNThesis:AUTO[:STATe]
OFF|ON|0|1
[:SENSe]:SPECtrum:FREQuency:SYNThesis:AUTO[:STATe]?
SPEC:FREQ:SYNT:AUTO ON
ON
Saved in instrument state.
Prior to A.07.00
Meas Setup, PhNoise Opt
SPEC:FREQ:SYNT 1