Kitz Forum
Broadband Related => ADSL Issues => Topic started by: Weaver on November 28, 2020, 11:39:54 AM
-
Take a look at the picture below showing all the spikes in the QLN for my line #4, compared with the other lines, in which almost all are absent:
How can the pictures be different? The lines run along the same route, with the slight exception of line 2 which is not an EO line, so we believe?
Any idea if these are radio stations or some such and if so what?
The bits per bin graph for line 4 indicates that the spikes above tone 170 don’t matter anyway because zero bits are allocated to those higher bins.
Line 4:
(https://i.postimg.cc/4dDMYq4c/B055-F537-E47-E-4619-9-F42-FDEE6-B6205-CC.png)
And for comparison:
Line 1:
(https://i.postimg.cc/FFcWzTMy/D3667-B98-C331-4-BE6-8235-7-AD632272-E3-A.png)
Line 2:
(https://i.postimg.cc/X7CjD6BR/89-C9-DF1-D-BFF0-469-F-81-CC-51151-D51047-F.png)
Line 3:
(https://i.postimg.cc/XJdLzJ3Z/733184-BE-A9-B0-4-BD3-B390-87-A3245-E30-D7.png)
Bits per bin for line 4:
(https://i.postimg.cc/KcHTXbqQ/E0-D94-B7-E-C83-C-4-F11-88-A7-AA03-ABDA3-C45.png)
-
Take a look at the picture below showing all the spikes in the QLN for my line #4, compared with the other lines, in which almost all are absent:
How can the pictures be different?
It's a mystery. I cannot think of any reason.
The lines run along the same route, with the slight exception of line 2 which is not an EO line, so we believe?
When I last checked on the status of the four lines, that of number two, which was provisioned with the aid of a pair-divert and originally mentioned PCP10, was no longer associated with that cabinet.
Any idea if these are radio stations or some such and if so what?
It's very difficult to determine from the plot. Use the raw data, locate the maximum, multiply the sub-carrier index of each maximum by 4.3125 kHz and you will have the frequency for each one. Now visit this site (http://www.mediumwaveradio.com/uk.php) and see if you can find a match.
-
Thank you very much for that link, just what I was looking for.
-
For reference purposes, here are the five URLs that I have stored under a "Radio" heading --
https://rsgb.org/main/operating/band-plans/
http://www.frequencyfinder.org.uk/
https://tx.mb21.co.uk/
http://www.mediumwaveradio.com/
https://www.short-wave.info/
-
I can’t seem to find out what tone 122 is - any suggestions ? I can’t seem to find anything listed at around 526.125 kHz.
-
So the frequency in question is approximately 526 kHz - 527 kHz. That's an odd one. I can't find any potential candidate transmitter.