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A
W
G
9 1
2 2
4 2
6 2
*
I
t n
r e
o p
t a l
d e
e b
w t
e
n e
0 7
F º
* *
E
t x
a r
o p
t a l
d e
f
o r
m
0 7
F º
2. Find the first segment resistance on the vertical
axis.
3. Find the second segment resistance on the
horizontal axis.
4. Find the instance where the two points from steps
2 and 3 meet on the graph.
HDSL4 Single Pair Resistance for Span Powering Two Repeaters and an H4TU-R
1100
1000
900
800
700
600
WITHIN LIMITS
500
400
300
300
400
Figure 23. Resistance Budget Span Powering Two Repeaters
61222401L1-5C
Table 6. Single Pair Cable DC Resistance Value
R
e
s
s i
0 7
F º
6 1
4 .
5 6
3 3
0 .
6 0
2 5
4 .
8 9
3 8
4 .
5 7
a
d n
1
0 2
F º
a d
a t
a
d n
1
0 2
F º
a d
a t
Resistance Budget
Third Segment Resistance
500
600
Second Segment Resistance (ohms)
a t
n
c
e
o (
h
m
/ s
f k
) . t
0 9
F º
*
7 1
1 .
3 8
4 3
4 .
6 4
4 5
7 .
9 8
7 8
1 .
7 1
5. The point found in Step 4 must be below the
upper limit line defined by the third segment
measurement (Step 1). If the instance where these
two points is above this line, the H4TU-C cannot
span power two H4Rs and the H4TU-R.
Note that these measurements represent only one of
the two HDSL4 pairs.
OUTSIDE LIMITS
700
800
1
0 2
F º
1
0 4
8 1
2 .
1 6
8 1
6 3
6 .
6 0
8 3
8 5
2 .
5 2
0 6
2 9
5 .
1 8
6 9
900
1000
F º
* *
9 .
9 7
0 .
6 4
5 .
6 1
2 .
3 2
1100
17
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