Re: [Connectivity] Motorola 5100 vs. 5120 in Comcast HSI http://www.dslreports.com/forum/r14533678 en Sun, 29 Nov 2009 02:32:30 EDT Sun, 29 Nov 2009 02:32:30 EDT Re: [Connectivity] Motorola 5100 vs. 5120 http://www.dslreports.com/forum/remark,14533940 rseiler : Ah, OK. I see that mine with the Motorola is 34dB, when it was always between 36dB and 37dB with my old RCA. I always thought it could float down to 30 or so before problems cropped up, but 33 is cutting it close.]]> http://www.dslreports.com/forum/remark,14533940 Sat, 08 Oct 2005 18:04:47 EDT Re: [Connectivity] Motorola 5100 vs. 5120 http://www.dslreports.com/forum/remark,14533908 Nerdtalker :
said by rseiler See Profile :

Could you expound on that? Noise from what? Is there something I should be keeping it away from? And what's a "modulated plant"?
Noise as in low SNR (Signal to Noise Ratio). It just isn't as good at handling excessive noise (below 33dB) when the downstream channel is using 256QAM for modulation as the SB5100's broadcom chipset is.

Plant is just a term for cable system.
--
"Some people never see the light till it shines thru bullet holes." -Bruce Cockburn

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Spam: 8800+ messages currently using 268 MB (11%) of my 2442 MB]]> http://www.dslreports.com/forum/remark,14533908 Sat, 08 Oct 2005 17:58:25 EDT Re: [Connectivity] Motorola 5100 vs. 5120 http://www.dslreports.com/forum/remark,14533870 rseiler :
said by Nerdtalker See Profile :

SB5100
• TI (Texas Instruments) chipset is more susceptible to noise related issues, especially in a 256QAM modulated plant
Could you expound on that? Noise from what? Is there something I should be keeping it away from? And what's a "modulated plant"?

Incidentally, I note that I have firmware "SB5120-2.9.2.10-SCM03-NOSH," and I've seen references to it going back to last year. If it's still current, I guess they don't update it very often.]]> http://www.dslreports.com/forum/remark,14533870 Sat, 08 Oct 2005 17:52:19 EDT Re: [Connectivity] Motorola 5100 vs. 5120 http://www.dslreports.com/forum/remark,14533678 Nerdtalker : SB5100
• Has some upstream issues in ex-attbi areas, possibly firmware related
• Broadcom chipset handles noise better, and is thus hardier in 256QAM environments

SB5120
• Doesn't have the same upstream issues the SB5100 has (as far as I know)
• TI (Texas Instruments) chipset is more susceptible to noise related issues, especially in a 256QAM modulated plant
--
"Some people never see the light till it shines thru bullet holes." -Bruce Cockburn

I'm testing Gmail's spam filters: Broadbandreports1@gmail.com
Spam: 8800+ messages currently using 268 MB (11%) of my 2442 MB]]> http://www.dslreports.com/forum/remark,14533678 Sat, 08 Oct 2005 17:19:12 EDT Re: [Connectivity] Motorola 5100 vs. 5120 http://www.dslreports.com/forum/remark,14533639 MadMANN : The 5120 is more sensitive to "noise" than the 5100.]]> http://www.dslreports.com/forum/remark,14533639 Sat, 08 Oct 2005 17:11:39 EDT Re: [Connectivity] Motorola 5100 vs. 5120 http://www.dslreports.com/forum/remark,14532938 eatnaders : One is a Broadcom Chipset (SB5100) and the other is a Texas Instruments Chipset (SB5120). Motorola builds 2 vendor chipsets in case one vendor has manufacturing problems.]]> http://www.dslreports.com/forum/remark,14532938 Sat, 08 Oct 2005 14:37:15 EDT Re: [Connectivity] Motorola 5100 vs. 5120 http://www.dslreports.com/forum/remark,14532834 Trillionare : thanks]]> http://www.dslreports.com/forum/remark,14532834 Sat, 08 Oct 2005 14:15:50 EDT Re: [Connectivity] Motorola 5100 vs. 5120 http://www.dslreports.com/forum/remark,14532795 lilhurricane : »Comcast High Speed Internet FAQ »What are the differences between the Motorola SB5100, SB5101 & SB5120? :)]]> http://www.dslreports.com/forum/remark,14532795 Sat, 08 Oct 2005 14:08:51 EDT [Connectivity] Motorola 5100 vs. 5120 http://www.dslreports.com/forum/remark,14532747 Trillionare : Recently i decided to buy a cable modem and looking aroud i found a Motorola 5100 and a 5120 is there any diffrence between them, they are both the same price, which one should i get?]]> http://www.dslreports.com/forum/remark,14532747 Sat, 08 Oct 2005 14:00:54 EDT