“Wires-only” VDSL2 Modem Test Plan - NICC

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NICC ND 1436 V1.1.2 (2013-09)
Carrier Set Designation
Upstream Carrier Sets
Tone
Numbers
Maximum
power
level/carrier
(dBm)
Downstream Carrier Sets
Tone
Numbers
Maximum
power
level/carrier
(dBm)
A43 9 17 25 -1.65 40 56 64 -3.65
A43c 9 17 25 -1.65 257 293 337 -3.65
Table B.4 : Carrier Sets A43 and A43c
Note that the use of additional tone-sets (B43, B43c, V43 etc.) is not permitted as these may cause
the spectral limits defined in Parts B and C of the BT ANFP [6] to be breached.
Test Procedure – The Test Configuration shown in Figure B.4 shall be used for this test.
1) Set the spectrum analyser for a start frequency of 10kHz and a stop frequency of 5MHz.
2) Configure the DSLAM to implement an E-side electrical length (ESEL) value of 30dB and the
default band profile.
3) Connect the CPE modem to DSLAM using the Test Configuration shown in Figure B.4.
4) Set the line simulator to a loop length of 100m of TP-100 cable with noise injection disabled
(i.e. noise free).
5) During train-up, capture the handshake tones generated by each end of the transmission
system.
6) Compare the tones against those defined for A43 and A43c.
7) Repeat for a minimum of two other ESEL values (nominally 10dB and 50dB).
Expected Outcome – This test will be deemed a “Pass” only if A43/A43c tone sets are being used.
R.VDSL2.7 Support of UPBO
Description – The CPE modem shall support Upstream Power Back Off (UPBO) as defined in
G.993.2 [3].
Test Procedure – See R.VDSL2.4.
Expected Outcome – If the upstream transmit spectrum complies with Part C of the BT ANFP [6]
over the various loop lengths tested then this will be deemed a “Pass” as this requires UPBO to be
implemented correctly, else the result will be a “Fail”.
R.VDSL2.8 Support of U0 Band
Description – The CPE modem shall support the use of the upstream band (US0) between 25kHz
and 138kHz.
NICC Standards Limited