Kitz Forum
Broadband Related => ADSL Issues => Topic started by: konrado5 on November 11, 2014, 12:00:38 AM
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I have curious observations related to my Hlog.
1. First Hlog is Hlog on TP-Link WD-8950ND. Second Hlog is Hlog on D-Link DSL-2740B. Both Hlogs were measured on the same lenght of circuit. On the second graph attenuation is lower on the beginning of downstream, from around 250th tone to 511th tone. However, attenuation is slightly higher on around 70th tone and about 220th tone (lowest part of graph between 200th to 250th tone).
(https://forum.kitz.co.uk/proxy.php?request=http%3A%2F%2Fs25.postimg.org%2Fn75e7v6ej%2Fhlogtplink.jpg&hash=829c3ab59b4d8f340f030793ed465f882d8c24e6) (http://postimg.org/image/n75e7v6ej/)
(https://forum.kitz.co.uk/proxy.php?request=http%3A%2F%2Fs25.postimg.org%2Fxihr0iy3v%2Fhlogdlink.jpg&hash=e129fd9de952601ba5df5210f16b721c72f75538) (http://postimg.org/image/xihr0iy3v/)
2. Both Hlog were measured on D-Link DSL-2740B. First was measured when 12 meters long cable was connected to the socket, second were measured when 1 meter long cable was connected to the socket. Attenuation was slightly lower on 33th to around 180th tone. It was also lower on 250th to 400th tone. However, it was slightly higher on 180th tone to 238th tone and on the end of graph.
(https://forum.kitz.co.uk/proxy.php?request=http%3A%2F%2Fs25.postimg.org%2Frvle31vl7%2Fhlog_dlugi.jpg&hash=80832c627578ec1e902f4232d47602bf60fd377e) (http://postimg.org/image/rvle31vl7/)
(https://forum.kitz.co.uk/proxy.php?request=http%3A%2F%2Fs25.postimg.org%2F5864wwg17%2Fhlog_krotki.jpg&hash=274f8dce25206c0bc47143569470e5601a4978bb) (http://postimg.org/image/5864wwg17/)
3. Both Hlogs were measured on D-Link DSL-2740B. First was measured before cutting down about 20-30 meters of cable. Second was measured after cutting down. Details are here:
http://forum.kitz.co.uk/index.php?topic=14397.30 (reply #31)
On the second Hlog, attenuation is sligthly lower until 180th tone, significantly lower on 250th to 400th tone. However it is significantly higher on 180th to 238th tone and on the end of graph.
(https://forum.kitz.co.uk/proxy.php?request=http%3A%2F%2Fs25.postimg.org%2Fhwh4uuuqz%2Fhlogdiagmode5.jpg&hash=59f2fcbd9218ba569674866c4cd309378efe8b05) (http://postimg.org/image/hwh4uuuqz/)
(https://forum.kitz.co.uk/proxy.php?request=http%3A%2F%2Fs25.postimg.org%2F4gu45em97%2Fhlogdiagmode6.jpg&hash=4054a5e2b26408a53052a6e114a070f099032c7a) (http://postimg.org/image/4gu45em97/)
4. Conclusions: both changing the router to better and shortening the circuit causes lower attenuation at 250th to 400th tones and higher attenuation about 220th tone. Shortening the circuit causes lower attenuation at 250th to 400th tones and higher attenuation at 180th to 238th tones and on the end of graph.
How is it possible? JGO said something about capacitance and inductance in the other thread.
http://forum.kitz.co.uk/index.php?topic=14397.45 (reply #45)
Best regards
konrado5
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I'd like to tick some parts of graph. What linux program could do it?
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I'd like to tick some parts of graph. What linux program could do it?
Gimp (http://en.wikipedia.org/wiki/GIMP), the GNU Image Manipulation Program [1], will allow you to modify an image.
Please do not ask me how to use gimp. It is not something that I have mastered.
[1] http://www.gimp.org/
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I'd like to tick some parts of graph. What linux program could do it?
Gimp (http://en.wikipedia.org/wiki/GIMP), the GNU Image Manipulation Program [1], will allow you to modify an image.
Please do not ask me how to use gimp. It is not something that I have mastered.
[1] http://www.gimp.org/
See http://www.gimp.org/tutorials/
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I attach these Hlogs with highligths. Green means higher attenuation than on the second graph. Red means lower attenuation than on the second graph.
I attach in the above order.
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12 meter cable Hlog and 1 meter cable Hlog.
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Hlog before cutting down of the cable and after cutting down the cable.