Telecommunications Industry Association
TR41.9-06-08-009-M
Document Cover Sheet
Project Number
PN-3-0016-RV2
Document Title
Proposed ADSL All Digital Mode Requirements for TIA-968-B
Source
Cisco Systems, Inc. / Industry Canada
Contact
Tim Lawler
170 West Tasman Dr.
San Jose, CA 95134
Phone: (408) 527-0681
Fax: (408) 526-4184
Email: tlawler@cisco.com
Matthew Mulvihill
3701 Carling Ave. Bldg. #94
Ottawa, ON, CAN K2H 8S2
Distribution
Intended Purpose
of Document
(Select one)
Phone: 613-990-5314
Fax: 613-990-4752
Email: Mulvihill.matthew@ic.gc.ca
TR-41.9
X
For Incorporation Into TIA Publication
For Information
Other (describe) -
The document to which this cover statement is attached is submitted to a Formulating Group or
sub-element thereof of the Telecommunications Industry Association (TIA) in accordance with the
provisions of Sections 6.4.1–6.4.6 inclusive of the TIA Engineering Manual dated March 2005, all of
which provisions are hereby incorporated by reference.
Abstract
There are currently no US requirements covering ADSL All Digital Mode. However, there are ADSL All
Digital Mode requirements in Industry Canada CS-03, Part VIII. For Harmonization between TIA-968
and CS-03 these requirements should be included in TIA-968-B.
ADSL All Digital Mode terminal equipment transmits power in the voiceband that is higher then ADSL
over POTS and does not support the use of analog splitting technology for coexistence on the same pair
with voiceband services. Therefore, the PSD limits for ADSL in TIA-968-A-3 are not applicable to
ADSL All Digital Mode.
The requirements in this contribution for come from ITU-T G.992.3, Annex I & J, G.992.5, Annex I & J
and CS-03, Part VIII.
v1.0 – 20050426
Telecommunications Industry Association
TR41.9-06-08-009-M
NEW CLAUSES
4.5.9.1.5
Power Spectral Density and Total Power for ADSL2 All Digital Mode
The power spectral density (PSD) and total power of the signal transmitted by the ADSL2 All
Digital Mode shall meet the following requirements:
ADSL2 All Digital Mode shall comply with one or more of the upstream spectral masks (ADLU32 to ADLU-64) defined in the following figure and tables.
ADSL2 All Digital Mode shall operate with an aggregate (total average) power not to exceed
+13.4 dBm into 100 ohm measured between the Inband peak PSD (3 kHz < f < f1).
-20
-30
-40
-60
-70
-80
-90
-100
-110
Frequency (kHz)
Figure 4.XX PSD Mask for ADSL2 All Digital Mode
Page 2
30
00
0
16
30
12
21
f2
f1
3
1.
5
-120
0
PSD MASK (dBm/Hz)
-50
Telecommunications Industry Association
TR41.9-06-08-009-M
Table 4.XX PSD Mask Definition for ADSL2 All Digital Mode
Frequency Band (kHz)
0.2 < f ≤ 1.5
1.5 < f ≤ 3
3 < f ≤ f1
f1 < f ≤ f2
f2 < f ≤ 1221
1221 < f ≤ 1630
1630 < f ≤ 30000
PSD (dBm/Hz)
-46.5
-46.5 + (inband peak PSD + 46.5) x log2 (f/1.5)
inband peak PSD
inband peak PSD -48 log2 (f/f1)
-90
-90 peak, with max power in the [f, f + 1 MHz] window of
(-30 - 48 x log2 (f/1221)) dBm
-90 peak, with max power in the [f, f + 1 MHz] window of
-50 dBm
NOTE 1 – All PSDs measurements are into a 100 ohm.
NOTE 2 – The breakpoints in the table shall be connected by linear straight lines on a dB/log(f) plot.
NOTE 3 – Above 3 kHz, the peak PSD shall be measured with a 10 kHz resolution bandwidth. Below 3
kHz, the peak PSD shall be measured with a 100 Hz resolution bandwidth.
NOTE 4 – The power in a 1 MHz sliding window is measured in a 1 MHz bandwidth, starting at the
measurement frequency.
Table 4.XX Inband peak PSD Mask Designator for ADSL2 All Digital Mode
Designator
ADLU - 32
ADLU - 36
ADLU - 40
ADLU - 44
ADLU - 48
ADLU - 52
ADLU - 56
ADLU - 60
ADLU - 64
Inband peak PSD
(dBm/Hz
-34.5
-35
-35.5
-35.9
-36.3
-36.6
-36.9
-37.2
-37.5
Frequency f1
(kHz)
138
155.25
172.5
189.75
207
224.25
241.5
258.75
276
Page 3
Frequency f2
(kHz)
307
343
379
415
450
485
520
554
589
Telecommunications Industry Association
4.5.9.1.6
TR41.9-06-08-009-M
Power Spectral Density and Total Power for ADSL2+ All Digital Mode
The power spectral density (PSD) and total power of the signal transmitted by the ADSL2+ All
Digital Mode shall meet the following requirements:
ADSL2+ All Digital Mode shall comply with one or more of the upstream spectral masks (ADLU32 to ADLU-64) defined in the following figure and tables.
ADSL2+ All Digital Mode shall operate with an aggregate (total average) power not to exceed
+13.4 dBm into 100 ohm measured between the Inband peak PSD (3 kHz < f < f1).
-30
-40
PSD MASK (dBm/Hz)
-50
-60
-70
-80
-90
-100
-110
-120
0
1.5
3
f1
fint
686
1411
1630
5275
Frequency (kHz)
Figure 4.XX PSD Mask for ADSL2+ All Digital Mode
Page 4
30000
Telecommunications Industry Association
TR41.9-06-08-009-M
Table 4.XX PSD Mask Definition for ADSL2+ All Digital Mode
Frequency (kHz)
0.2
1.5
3
f1
f_int
686
1411
1630
5275
30000
PSD (dBm/Hz)
-46.5
-46.5
inband peak PSD
inband peak PSD
PSD_int
-100
-100 and -100 with a 1 MHz Measurement Bandwidth
-100 and -110 with a 1 MHz Measurement Bandwidth
-100 and -112 with a 1 MHz Measurement Bandwidth
-100 and -112 with a 1 MHz Measurement Bandwidth
NOTE 1 – All PSD measurements are in 100 ohm.
NOTE 2 –The breakpoints in the table shall be connected by linear straight lines on a dB/log(f) plot.
NOTE 3 – MBW specifies the measurement bandwidth. The MBW specified for a certain breakpoint with
frequency fi is applicable for all frequencies satisfying f i< f ≤ fj, where fj is the frequency of the next
specified breakpoint.
NOTE 4 – The power in a 1-MHz sliding window is measured in a 1-MHz bandwidth, starting at the
measurement frequency, i.e., power in the [f, f + 1 MHz] window shall conform to the specification at
frequency f.
Table 4.XX Inband peak PSD Mask Designator for ADSL2+ All Digital Mode
Designator
Inband peak PSD
(dBm/Hz)
Frequency f1
(kHz)
ADLU - 32
ADLU - 36
ADLU - 40
ADLU - 44
ADLU - 48
ADLU - 52
ADLU - 56
ADLU - 60
ADLU - 64
-34.5
-35
-35.5
-35.9
-36.3
-36.6
-36.9
-37.2
-37.5
138
155.25
172.5
189.75
207
224.25
241.5
258.75
276
Page 5
Intercept
Frequency f_int
(kHz)
242.92
274
305.16
336.4
367.69
399.04
430.45
461.9
493.41
Intercept PSD
Level PSD_int
(dBm/Hz)
-93.2
-94
-94.7
-95.4
-95.9
-96.5
-97
-97.4
-97.9
Telecommunications Industry Association
TR41.9-06-08-009-M
Longitudinal Output Voltage
4.5.9.1.4 Longitudinal Output Voltage
ADSL modems shall meet the voiceband longitudinal voltage limitations of 4.5.4.1 as well as the
limitations of 4.5.5.2.1 for a center frequency of 8 kHz, which covers the frequency span from 4
to 12 kHz. In addition, using the illustrative longitudinal output voltage measurement circuit in
Figure 4.5, ADSL and ADSL All Digital Mode modems shall limit longitudinal output voltage to
the values shown in the table below:
Table 4.12 (Transverse Balance Requirements)
Append the following row to Table 4.12:
ADSL All Digital Mode
0.2 to 2425
500/90
Page 6
100