EXFO CableSHARK P3 VF/DSL Cable Qualifier - Manual (Page 116)

VF / DSL Cable Qualifier
104
Example of a ADSL2+ ATU-C (downstream) mask (non-overlapped spectrum)
PSD in
dBm/Hz
36 dB/octave
–97.5 peak
+15 dBrn
0-4 kHz
–36.5 dBm/Hz peak PSD
–65 dB/octave
–100 dBm/Hz peak PSD
in 10 kHz window
peak PSD
in 1 MHz window
above 3750 kHz
0 4 138 1104 2208 12000
Frequency
in kHz
3175
1622 3001.5
2500
7225 3750 4545
–18 dB/octave
–3 dB/octave
–78 dB/octave
–46.5 dBm/Hz
–47.8 dBm/Hz
–59.4 dBm/Hz
–80 dBm/Hz
–110 dBm/Hz –112 dBm/Hz –100 dBm/Hz
80
–92.5 dBm/Hz
–72.5 dBm/Hz
–44.2 dBm/Hz
4.63 dB/octave
Example of a ADSL2+ ATU-R (downstream) mask (non-overlapped spectrum)
PSD in
dBm/Hz
21.5 dB/octave
–97.5 peak
+15 dBrn
0-4 kHz
–34.5 dBm/Hz peak PSD
-72 dB/octave
–100 dBm/Hz peak PSD
in 10 kHz window
peak PSD
in 1 MHz window
above 3750 kHz
0 4 25.875 138 686 12000
Frequency
in kHz
5275 1411 1630
-15 dB/dec
–92.5 dBm/Hz
-93.2 dBm/Hz
–110 dBm/Hz –112 dBm/Hz –100 dBm/Hz
243