This is how I've come to understand these...
Micro-reflections are typically "echos" of the primary burst-signal from a modem. The 'higher' the dBc value the better. I believe that -20dBc is a minimum to shoot for.
From what I've read, these problems occur where the upstream plant is not properly aligned (SWEEP!!), or when the upstream modem carriers are placed too close the edge of the passband (above 36 Mhz in a 5-42 system). Also any source of signal reflections in the reverse path need to be corrected.
If anyone knows any different, or can add to this, please do!!
Re: Toshiba PCX1100 & PCX1000
Member #: 19319
Registered: 1996-2001
Posted:
143
Name:
Lorne
Company:
major MSO (3rd namechange in 5 years)
Occupation:
Lead System Tech
Location:
Virginia
Personal:
60-ish
Experience:
~31 years
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