ADTRAN T200 HDSL4 Installation And Maintenance Practice page 22
Transceiver unit for the remote end
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Also See for T200 HDSL4:
- Installation and maintenance practice (28 pages) ,
- Installation and maintenance manual (26 pages) ,
- Specifications (2 pages)
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8. Insertion Loss limits. See Table 8.
The asymmetric nature of the HDSL4 TC PAM
line code necessitates that insertion loss be
verified at 4 separate frequencies. Verifying at
only 196 kHz will not insure proper circuit
performance.
9. Simplified Loop Qualification Procedure.
See Table 9 and Table 10.
F
r
q e
u
n e
y c
(
K
H
) z
0 5
0 8
1
0 3
1
6 9
Table 9. Single Span and First Segment of Repeatered Loop
F
r
q e
u
n e
y c
k (
H
) z
R
e
o c
0 5
0 8
1
0 3
1
6 9
1
f I
a
y n
i s
g n
e l
f
e r
u q
n e
y c
n i
e s
m
u
t s
e b
>
3
0 .
d
B
Table 10. Second or Third Segment of Repeatered Loop
F
r
q e
u
n e
y c
k (
H
) z
R
e
o c
0 5
0 8
1
0 3
1
f I
a
y n
i s
g n
e l
f
e r
u q
n e
y c
n i
e s
m
u
t s
e b
>
3
0 .
d
B
22
Table 8. HDSL4 Loop Insertion Loss Values
(Based upon 26 AWG cable)
t s
1
S
g e
m
e
t n
L
o
s s
1 3
5 .
5 3
3 .
9 3
1 .
3 4
0 .
(Based upon 11.1 kft. of 26 AWG cable)
m
m
n e
d
d e
M
a
i x
m
u
m
L
o
s s
d (
1 3
5 .
5 3
3 .
9 3
1 .
3 4
0 .
i t r
n o
o l
s s
x e
e c
d e
t s
e h
m
a
i x
m
u
(Based upon 10.5 kft. of 26 AWG cable)
m
m
n e
d
d e
M
a
i x
m
u
m
L
o
s s
d (
9 2
9 .
3 3
5 .
7 3
1 .
i t r
n o
o l
s s
x e
e c
d e
t s
e h
m
a
i x
m
u
For each of the four (or three for second and third
segment) measured insertion loss values, compute the
difference between the recommended maximum loss
and the measured loss (rec minus measured). If all
differences are positive, then the loop meets the
performance criteria. If any one of the difference
values is negative (measured loss is more than rec
maximum loss), then the sum of the differences must
be at least +3dB for 1st segment or +1 dB for 2nd/3rd
segment. If neither of these criteria is satisfied, then
the loop is suspect and may not provide robust
HDSL4 deployment.
R
e
o c
m
m
n e
d
d e
M
a
i x
d (
) B
) B
M
e
s a
r u
d e
L
o
s s
1
S
u
m
D
m
l
s o
( s
e d
a t l
o l
s s
<
0
, )
h t
n e
t
e h
) B
M
e
s a
r u
d e
L
o
s s
1
S
u
m
D
m
l
s o
( s
e d
a t l
o l
s s
<
0
, )
h t
n e
t
e h
m
u
m
n
d
d r
2
3 /
S
g e
m
e
t n
L
o
s s
d (
9 2
9 .
3 3
5 .
7 3
1 .
N
A /
d (
) B
D
l e
a t
L
o
s s
d (
B
e
a t l
L
o
s s
=
u s
m
o
t f
e h
o f
r u
e d
a t l
o l
s s
a v
d (
) B
D
l e
a t
L
o
s s
d (
B
e
a t l
L
o
s s
=
u s
m
o
t f
e h
o f
r u
e d
a t l
o l
s s
a v
61222426L1-5B
) B
( )
M
a
- x
M
a e
) s
u l
s e
( )
M
a
- x
M
a e
) s
u l
s e
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