[Solved] Scaling issue #14 again?

janh / go-dsl

Library and application for reading xDSL stats

Mozilla Public License 2.0

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[Solved] Scaling issue #14 again? #17

Closed thatso closed 4 months ago

thatso commented 4 months ago

I'm experiencing scaling issues which resemble the ones solved with #14: the graphs seem to be cut off on the right border relative to the legends.

My modem is a Technicolor DGA4132 with custom firmware based on the Broadcom chipset with xdslctl.

janh commented 4 months ago

I assume what you mean is that the data in the graph already stops at around carrier 7770 / 33.5 MHz? This is not a scaling issue, it is the actual data. Some network operators (like Deutsche Telekom) don't actually make use of the entire frequency range. You can check the band values reported by xdslctl info --pbParams and compare them with the graph to make sure it is correct.

The previous issue #14 affected only the Hlog (channel characteristic) graph on Fritzboxes. If you look at the screenshot in that issue, the problem were the two lines around 2.5 MHz and 5 MHz which actually belong in the green (upstream) area.

thatso commented 4 months ago

Thank you for your fast reaction and spot-on explanation. :+1: The relevant output of xdslctl info --pbParams gives:

Medley Phase (Final) Band Plan
US: (7,60) (871,1205) (1972,2771) 
DS: (65,859) (1216,1961) (2793,7751)

As you suspected, I was focussing on what looked like a missing frequency range as I did not expect my network operator to make a hard cut at the upper end. :open_mouth: Happily closing this as resolved. :smile: