Hi guys, I have a problem and am looking for a solution. I have a system that has 4 nodes (600+ subs) all agragateing on to one return path. the reason is the fiber is not continious between the headend and nodes(s). There is 4 miles of 12 count fiber that feeds a node (call it node A). Then there is 6 trunk stations between node A and the next fiber segment. At that point there is a laser in an environmental cabinet that feeds nodes B,C and D. Each node has it's own pair of fibers from the environmental cabinet.
The reason for the gap in fiber is the Forrest Service refuses to grant us permission to bury the fiber across there land, At least not without paying for impact reports and permits, ect. that we as a small company just cant afford.
The problem is there is too much system being agregated through one path (the coax). The SNR on that upchannel is typically 20dB, but if the slightest thing goes even a little south, the whole part of the system (node A and beyond) has problems. There are no real alternatives. Microwave would take at least 2 hops, there is no other fiber between (like telco or city/county).
What I am wondering is if there is a way I can convert the upchannels from nodes B,C and D from the normal 23 MHz channel to individual upchannel frequencys for the run back up the coax, like node B to 29 MHz, node C to 35 MHz and Node D to 41 MHz. And if so is there already a product out there for that (a sub-band to sub-band superhetrodine converter).
And if this would work, would I have to convert each channel (except A) back to the 23 MHz original freq for the CMTS to recognise a modem upstream (that's on a different freq then the CMTS expects?
Thanks in advance for the help. Any ideas would be appriciated.
I may not be back to check for replies for a couple days.
need upstream data help
Member #: 37209
Registered: 4/4/2005
Posted:
64
Name:
chad thomas
Name:
Chad Thomas
Company:
Cal-Neva Broadband
Occupation:
Engineer
Personal:
early 50s
Experience:
~41 years
There are 9 replies to this message
