Agilent Technologies Signal Analyzer N9030a - Manual (Page 833)

6 RLC Swept SA Measurement Front-Panel & SCPI Reference
Meas Setup
PhNoise Opt
Selects the LO (local oscillator) phase noise behavior for various desired operating conditions.
Key Path Meas Setup
Remote Command [:SENSe]:FREQuency:SYNThesis[:STATe] 1|2|3
[:SENSe]:FREQuency:SYNThesis[:STATe]?
Example FREQ:SYNT 2 selects optimization for best wide offset phase noise
Notes Parameter:
1: optimizes phase noise for small frequency offsets from the carrier.
2: optimizes phase noise for wide frequency offsets from the carrier.
3: optimizes LO for tuning speed
The actual behavior varies somewhat depending on model number and option; you always get
fast tuning by choosing #3, but in some models, the “Fast Tuning” choice is identical to the
“Best Close-In” choice. Specifically:
•
Models with option EP1 (for example PXA), have a two-loop local oscillator, which switches to
a single loop for fast tuning
•
Models with option EP2 (available, for example, for MXA), use a different loop bandwidth for
the fast-tuning choice, which is a compromise between tuning speed and phase noise, giving
good tuning speed at all offsets, although not as good as for Close-In; this is useful when you
have to look across a wide range of spans
•
In all other cases, Fast Tuning is the same as Best Close-In.
Dependencies Does not appear in all models. The key is blank in those models, but the SCPI command is
accepted for compatibility (although no action is taken).
Preset Because this function is in Auto after preset, and because Span after preset > 314.16 kHz (see
Auto rules, next section) the state of this function after Preset will be 2
Initial S/W Revision Prior to A.02.00
Modified at S/W
Revision A.12.00
Auto
Selects the LO (local oscillator) phase noise behavior to optimize dynamic range and speed for
various instrument operating conditions.
The X-Series has several grades of LO that offer different configurations when in the Auto Mode.
•
"Models with Option EP1" on page 834 (high-performance PXA)
•
"Models with Option EP2" on page 834 (available for example in MXA for excellent phase noise)
•
"Models with Option EP4" on page 835 (available in CXA for improved phase noise)
Remote Language Compatibility Measurement Application Reference 833