“Wires-only” VDSL2 Modem Test Plan - NICC

Level (dBm/Hz)
Level (dBm/Hz)
20
NICC ND 1436 V1.1.2 (2013-09)
performance if the splitter filters used at each of the line are compliant with ETS 101 952-1 [16] or
ETS 101 952-3 [17].
B.1.2.3 Crosstalk
The VDSL2 “Stockholm Lite” noise model shall be used as it includes the US0 band whereas the
noise models defined in TR-114 do not currently include this frequency band (25 to 138kHz). This
is representative of the noise ensemble that can be expected in a typical NGA cable binder.
A separate pair of noise files (upstream and downstream) is generated for each distance. In
addition, a set of noise files is required for each of the 27 CAL (Cabinet Assigned Loss) values
defined in the ANFP [6] as the DPBO shaping impacts the transmit PSD of the VDSL2 signal
launched at the cabinet. The noise files for a 500m length of 0.5mm copper cable (equivalent to an
electrical loss of 10dB measured at 1MHz) are shown below for CAL values of 10, 30 and 50dB.
-80
Downstream NGA Noise (kl0=10dB)
-90
-100
-110
CAL=10dB
CAL=30dB
CAL=50dB
-120
-130
-140
10,000 100,000 1,000,000 10,000,000 100,000,000
Frequency (Hz)
Figure B.1 : Downstream NGA Noise Spectrum (500m)
-80
Upstream NGA Noise (kl0=10dB)
-90
-100
-110
CAL=10dB
CAL=30dB
CAL=50dB
-120
-130
-140
10,000 100,000 1,000,000 10,000,000 100,000,000
Frequency (Hz)
Figure B.2 : Upstream NGA Noise Spectrum (500m)
These noise files can be generated and injected using a noise generator/injector unit.
NICC Standards Limited