Agilent Technologies HP 8642A/B Dokumentacja Strona 427

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Table 8-5. Status Messages (2 of 11)
Approx internal noise floor {LNA in, Offsets > 10 kHz: dBc/Hz... The Detector Constant
and LNA determine the System Noise Floor.
E
CD
XJ
>
0)
Q-S
OL
+ 15
+
D
c
en
L Port Signal Level
Is Assumed to be
Appropriate for the
Phase Detector
-15
-120 -130 -140 -150 -160 -170 -180
Approximate Phase Noise Floor (dBc/Hz)
f> 10 kHz
Automatically establishing quadrature... The system is establishing quadrature.
Beatnotes: f1, f2, f3, f4... Beatnote frequencies for -45%, -15%, +15%, and +45% of the
Tuning Range around the Center Voltage are shown in conjunction with the non-linear Tuning
Constant error.
Action:
Correct the Tuning Constant error by finding a linear region in the center of the VCO
Tuning Curve (Refer to Error Message 7).
8-30 Status Messages
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