Agilent Technologies HP 8642A/B Specifiche Scaricare il pdf (Pagina 205)

100

101

Closed

PLL

Bandwidth:

This is the predicted Phase Lock Loop Bandwidth

(PLL BW) for the measurement. The predicted PLL BW is based on the

predicted Peak Tuning Range (PTR) as shown in Figure 3-2. (Note that

the predicted PLL BW value is not adjusted when the PTR is adjusted as

a result of an Accuracy Specification Degradation.)

100k

10k

100

I 1 1 1 1 1

°;/y

i i

1 !

■/

1 1

5//K

1 1 1 1

*—

! 1

.1 1

10 100 1k 10k 100k 1M 10M 100M 1G

Peak Tuning Range (Hz)

* Lag/Lead Filter Number

Figure 3-2. Phase Lock Loop Bandwidth Relative to the Peak Tuning Range.

Peak Tuning Range: This is the Peak Tuning Range (PTR) for the

measurement determined from the Tuning Constant and the Voltage Tune

Range. This is the key parameter in determining the PLL properties, the

Drift Tracking Range, and the ability to phase lock sources with high close

in noise.

The PTR value displayed should be approximately equal to the product of

the VCO Tune Constant times the Voltage Tune Range. This will not be

the case when a significant Accuracy Specification Degradation is detected

( > 4 dB) by the Loop Suppression Verification. For Accuracy Specification

3-10 Param Summary

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Agilent Technologies HP 8642A/B Specifiche Pagina 205

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