netmasta Posted February 15, 2005 CID Share Posted February 15, 2005 They updated the modem list a few days ago. Modem Modem Max Download Brand Model (Mbps) ----------------------------------------- Motorola SB3100 4.9 (OS: VxWorks 5.3.1) Terayon ECM615 3.8 Thompson (RCA) DCW615 5.4 I think Comcast is still troubleshooting problems with the upgrades. I still don't get the faster speeds yet either. Also, I assume you're subscribing to the 6Mb/384/Kb service ($10 extra) Quote Link to comment Share on other sites More sharing options...
organ_shifter Posted February 15, 2005 CID Share Posted February 15, 2005 Yeah, I have the 6000/768 service now. I get what I pay for when I use my Scientific Atlanta DPC2100 Series modem. It's just the SB4200 that won't get down for me. This really pisses me off. I'd rather use my surfboard . Quote Link to comment Share on other sites More sharing options...
Comcasttech Posted March 8, 2005 CID Share Posted March 8, 2005 Hi In my understanding your downstream power is the signal level you getting from your isp provider ( Cable company) in perfect world it should be in range from 0 to 7 dBmV, as of Upstream power, level is showing how much power modem has to send out to reach the CSMT. Once again in prefect world it should be in range of 40 to 50 dBmV. Please understand that all this is in perfect world with out any noise on the lines, no signal leakage. Any Q's please Ask Quote Link to comment Share on other sites More sharing options...
CA3LE Posted March 9, 2005 CID Share Posted March 9, 2005 Output Impedance . . . . . . . . . . . . . . . . . . . . 75 Ω (nominal) Off topic... but I didn't know there was a symbol for Ohm ( Ω ) on the symbol map in windows Quote Link to comment Share on other sites More sharing options...
ToWhateverEnd Posted March 9, 2005 CID Share Posted March 9, 2005 Downstream Value Frequency 693000000 Hz Signal to Noise Ratio 33 dB QAM 256 Network Access Control Object ON Power Level -5 dBmV Upstream Value Channel ID 1 Frequency 35600000 Hz Ranging Service ID 3030 Symbol Rate 3.200 Msym/s Power Level 50 dBmV Is this good? I read you're supposed to have 0-5 for the downloadstream and mine is -5. But on the speed tests I usually average 6,000-6,200 and with the overhead factored in 6400-6700. I get more than the advertised speeds for 6,000/768. Although the upload hovers around 690-715 most of the time. Quote Link to comment Share on other sites More sharing options...
dn0 Posted March 10, 2005 CID Share Posted March 10, 2005 Yes, those levels look good. -10 to +10dBmv is the good range for a Docsis modem downstream. 50dBmv is on the high end, but still good for the upstream. I see it says 3.2 Msym/s symbol rate on the return. You must be located in Europe? Quote Link to comment Share on other sites More sharing options...
dn0 Posted March 10, 2005 CID Share Posted March 10, 2005 EDIT: After looking into it a little, the symbol rates appear to be the same between DOCSIS and EuroDOCSIS even though the European channel plan consists of wider channels. I wonder if the Moto diag page has a misprint in it; maybe should be 3.2Mhz wide channel, 2.56 Msym/second. Oh well, I must be bored...... Quote Link to comment Share on other sites More sharing options...
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