Thread: Superhub Power levels too high?
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Old 05-09-2012, 20:08   #22
sollp
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Re: Power levels too high?
Quote:
Originally Posted by scaseman View Post
I fitted a 10Db Forward Path Attenuator and now get the following. Are these power levels still ok.

Downstream Channels
Lock Status Channel ID Frequency Modulation Rx Power SNR Pre RS Errors Post RS Errors
Locked 43 315000000 Hz QAM256 -4.3 dBmV 41.4 dB 98 0
Locked 40 291000000 Hz QAM256 -3.4 dBmV 41.4 dB 22 0
Locked 41 299000000 Hz QAM256 -3.6 dBmV 41.8 dB 40 0
Locked 42 307000000 Hz QAM256 -4.1 dBmV 41.8 dB 46 0
Unlocked Unknown 0 Hz Unknown 0.0 dBmV 0.0 dB Unknown Unknown
Unlocked Unknown 0 Hz Unknown 0.0 dBmV 0.0 dB Unknown Unknown
Unlocked Unknown 0 Hz Unknown 0.0 dBmV 0.0 dB Unknown Unknown
Unlocked Unknown 0 Hz Unknown 0.0 dBmV 0.0 dB Unknown Unknown
Upstream Channels
Lock Status Channel ID Frequency Modulation Tx Power Mode Channel Bandwidth Symbol Rate
Locked 1 35800000 Hz ATDMA 40.5 dBmV 16QAM 6400000 20480 Kbits/sec
Unlocked 0 0 Hz Unknown 0.0 dBmV Unknown Unknown 0 Kbits/sec
Unlocked 0 0 Hz Unknown 0.0 dBmV Unknown Unknown 0 Kbits/sec
Unlocked 0 0 Hz Unknown 0.0 dBmV Unknown Unknown 0 Kbits/sec
Even though the recieve levels are better the upstream TX Power should not have been attenuated, so something is still not quite right. After having another look, you were originally locked onto 27.40mhz but since the levels have been adjusted and HDU fitted it's now locked onto 38.50mhz with a 5dB variance so could well be incorrect return levels in the network?
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