Originally Posted by yukon04
Thanks for you response. The Comcast system is optical cable up to distribution box, then copper coax to individual homes. I have a single coax copper input split 8 ways with an EDA-2800 splitter I purchased on-line. It seems to work fairly well, but one of the room outlets has problems with lower level analog channels (2 thru 4). Could be the wall connection, it has not been upgraded since house was built.
Last night there were intermittent drop-outs of very short duration, barely noticeable. I plan to visit the attic and switch some of the connections around. The wall connection, outlet cable and the HDMI cable are new. The HDMI cable is 6' long. I have had Comcast out several times to check out signal strength and most of the connections were well above minimum. One outlet was 10db higher than normal? I may ask for another check in the near future.
Comcast is switching from Scientific Atlanta boxes to Cisco boxes (since Cisco bought out SA). Cisco boxes are very compact, black in color and have no clock, sort of like my old Pioneer DVD player. Has anyone had experience with these?
So, with the 8300HD's Diag screen, you can check the levels yourself (and not have to wait for Comcast or believe what they tell you ... or be able to check your work as you change things around). It's just as accurate as the handheld computerized checker they use. The handheld unit is nice because it's completely portable so it can easily be used on the side of the house where the service enters the residence. You can run a short piece of RG-6 or RG-6 quad-shield out the window to connect the 8300HD directly to the side of the house to check it there. Or, if the cable comming into the EDA-2800 is nice, new and perfect, short and comes directly from the side of the house ... you can just check it there (on the input side ... temporarily removing the EDA-2800 from the system). Again, the (QAM & FDC) signal that hits the house should be as close to Zero as possible. Slightly Positive is ok also to survive splitting and the addition of more coax (as it is split, it works it's way toward 0). If the signal is bad/weak, the EDA-2800 will only amplify and send a stronger bad signal. Most power boosters are only powered so that after IT splits the signal so many times, all the outputs can be close to the same as the original input.
Here are my levels:
Current Levels (with powered booster) 2-2010
Main Living Room DVR (original/oldest one)
Name Freq. Level
QAM 723.0Mhz .. +1 dBmV
FDC .. 75.0Mhz ... 0 dBmV
RDC 16.750Mhz .. +39dBmV
Range and Desc.
Tuner1 (QAM): -12 to +15 ... 256QAM or normal encrypted digital video
FDC: ............ -15 to +15 ... QPSK Software DL and program guide.
RDC: ............ +25 to +53 ... QPSK reverse carrier (error checking back-channel upload)
FDC(Forward Data Channel) - RDC(Reverse Data Channel)
FDC: RoadRunner Cable Modem frequency is close to this one.
FDC: If out-of-range, your cable modem is likely also having a hard time holding a connection.
RDC: Verifies data and programming code was uploaded properly (probably by sending checksums back)