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Anything else >> General and other topics >> DRO or PLL with scpc/scpc

Message started by inspiron on Jul 2nd, 2009 at 5:05pm

Title: DRO or PLL with scpc/scpc
Post by inspiron on Jul 2nd, 2009 at 5:05pm
hi everybody

i'm new in this really great forum

can i use LNB type DRO with my service (1024/256 kbps dedicated scpc/scpc ) or i should use the PLL type. someone told me that i can, and another told me i can't. so i'm very confused.

And what about the ISP, he can provide the services ( not this service in above but in general) to both types of the LNB, right?


Title: Re: DRO or PLL with scpc/scpc
Post by Eric Johnston on Jul 4th, 2009 at 12:59pm
Use a PLL type LNB at both ends.

DRO type LNBs have very poor frequency stability, often so large as to exceed the carrier bandwidth of  1024/256 kbits carriers, so your receive modem may never find the carrier in the first place and may lose the carrier in service due to temperature changes.

If you can, use extra large antennas at both ends, BUCs operated well below their maximum ratings and advanced modems with 8-PSK or 16-QAM modulation options.  PLL LNBs are a must.   You may be able to reduce your monthly charges by half.  This saving will very quickly cover the extra initial hardware costs.

Best regards, Eric.

Title: Re: DRO or PLL with scpc/scpc
Post by TDMAMike on Jul 5th, 2009 at 12:11am
Agree with Eric, PLL all the way. You will be thankful you did.  Esp with a carrier that small (1024)

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