HDM8513 datasheet(60/67 Pages) HYNIX

Part #	HDM8513

Description	DVB/DSS Compliant Receiver

PDF	67 Pages

Scroll/Zoom	100%

Manufacturer	HYNIX [Hynix Semiconductor]

Direct Link	http://www.skhynix.com/kor/main.do

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60 / 67 page

Figure A2 illustrates the transient response of the carrier tracking loop with the same loop

bandwidth settings at high signal-to-noise ratio. The phase step for this test corresponds to 45

degrees. The actual bandwidth of the carrier loop is greater than that of the symbol loop for the

same settings because the carrier loop must cope with greater dynamics (such as frequency offset

and drift). Figure A3 illustrates the transient response of the carrier phase tracking loop under the

same conditions at minimum signal-to-noise ratio (Eb/N0 of 4 dB with rate 1/2 coding). The

highest bandwidth case will pull in with a carrier frequency error of + or - .005 of the symbol rate at

this minimum signal level. Higher loop bandwidth may be programmed to provide greater pull-in

with higher signal-to-noise ratio conditions.

FIGURE A2: CARRIER PHASE RECOVERY TRANSIENT RESPONSE

HDM8513 Datasheet(PDF) 60 Page - Hynix Semiconductor