Agilent Technologies E5500 Series Dokumentacja Pobierz pdf (Strona 30)

5) Zero-beat sources to reduce beat note to

<5 percent of PTR (2 Hz).

(This is often accomplished in a non-pulsed

condition since it is very difficult to view

the beat note within the RF pulse, as

observed on the oscilloscope.)

c) Select Continue.

If the Out-of-Lock warning message appears,

verify that the voltage within the RF pulse

“ON” portion is zero volts (observed on the

scope). If phase-lock has been achieved, select

Continue; if phase-lock has not been achieved,

select Re-try. Phase-lock indications include

a flat zero-volt trace (no presence of any

beat note or search signal).

6. When the measurement is complete, print the

results and save the measurement file.

Figure 3-4. Pulsed carrier PLL phase noise measurement of Agilent 83732B

versus 8644B

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Agilent Technologies E5500 Series Dokumentacja Strona 30