VP306 datasheet(40/85 Pages) MITEL

40 / 85 page

VP305/6

DRAFT - PRELIMINARY DATA

The duplication or disclosure of data contained on this sheet is subject to the restrictions

on the title page of this document.

2.7.5. CR_KP: Carrier loop filter gain (P term) register.

Parallel mode -

Bank 2. Address 5.

Type Read / Write.

Serial mode - Address 21.

76543210

CR_KP[7:0] Carrier loop filter gain (P term)

This term, CR_KP * 2 determines the resolution of the Sigma Delta conversion. It

should be >30 for six bits of resolution.

Es / No (dB )

0dB

2dB

4dB

6dB

8dB

10dB

12dB

14dB

16dB

18dB

20dB

DDML B PS K

DDML QPS K

NDAML QPS K

Fig. 15. Carrier phase error detector gain KD_CR vs. Es / No for AGC_REF = 84.

2.7.6. CR_KD: Carrier loop filter gain (D term) register.

Parallel mode -

Bank 2. Address 6.

Type Read / Write.

Serial mode - Address 22.

76543210

CR_KD[7:0] Carrier loop filter gain (D term)

CR_KD[7:0]

Carrier loop filter gain (D term)

The loop damping factor is given by the following equation:

ζ =

2 * CR_KD *

where

ωn = natural frequency in radians / second

Rs = QPSK symbol rate.

VP306 Datasheet(PDF) 40 Page - Mitel Networks Corporation

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