I've read about difference between signal attenuation and line attenuation:
On this page I've read that line attenuation is measured on DSLAM. However my router give me both signal attenuation value as well as line attenuation.
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adsl: ADSL driver and PHY status Status: ShowtimeRetrain Reason: 8000Channel: FAST, Upstream rate = 1229 Kbps, Downstream rate = 15383 Kbps Down UpSNRM(dB): 5.3 6.9 LATN(dB): 25.0 14.8SATN(dB): 25.0 14.1 TxPwr(dBm): 18.6 12.1
I'm curious whether SATN is depended on power output or other constraints. I've noticed my SATN for download is always the same for download as LATN, however my SATN for upload is often lower than LATN. I'm noticed also that on upstream I often have higher SNR margin and lower SATN despire higher synchronization rate, lower power output value and the same used tones. I'm very suprised by that. I suspect my router sometimes erronously report Power Output for upstream and SATN is lower if power output is higher. Do I think rightly?
In order to be accurate I'm going to give some datas. I have for example: at 1229 kbps continously SNR margin 6.8-7.0 dB and power output 12.1 dBm and SATN 14.1 dB or 1221 kbps, continously SNR margin 6.4-6.6 dB, power output 12.3 dBm and SATN 14.7 dB. Sometimes at the same power output at higher synchronization rate I have lower SATN and higher SNR margin.
Edited by konrado5 (Thu 07-Nov-13 21:00:15)