Deployment Guidelines
61180105L1-5C
27
Deployment Guidelines
The
Total
Reach
DDS
‐
DP
and
DDS
‐
R
use
technology
intended
to
eliminate
the
need
for
repeaters
and
concerns
over
impairments
caused
by
typical
noise
and
bridged
tap.
describes
cable
loss
for
the
Total
Reach
DDS
Nyquist
frequency
of
13.3
kHz,
while
measures
the
DDS
insertion
loss.
Listed
below
are
the
loop
design
guidelines
for
Total
Reach
DDS:
• All
loops
must
be
nonloaded.
• Actual
measured
loss
(AML)
should
not
exceed
50
dB
at
13.3
kHz
(135
Ω
termination),
the
Nyquist
frequency
of
Total
Reach
DDS.
NOTE
The
50
dB
AML
limit
includes
6
dB
of
signal
margin
to
account
for
potential
near
‐
end
cross
talk
(NEXT)
from
other
digital
services
that
may
be
provisioned
in
the
same
binder
group.
• Loop
length
should
not
exceed
50
kft.
• Bridged
tap
length
should
not
exceed
12
kft.
• Background
noise
level
should
not
exceed
34
dBrn.
• Impulse
noise
level
should
not
exceed
‐
40
dBm,
(+50
dBrn).
Table 8. Cable Type and Temperature Loss Data @ 13.3 kHz
Plastic Cable
dB Loss/kft
Paper Cable
dB Loss/kft
19
Gauge
PIC
(0°
F)
19
Gauge
PIC
(70°
F)
19
Gauge
PIC
(120°
F)
0.5302
0.6083
0.6610
19
Gauge
PULP
(0°
F)
19
Gauge
PULP
(70°
F)
19
Gauge
PULP
(120°
F)
0.5616
0.6415
0.6955
22
Gauge
PIC
(0°
F)
22
Gauge
PIC
(70°
F)
22
Gauge
PIC
(120°
F)
0.912
1.0258
1.1015
22
Gauge
PULP
(0°
F)
22
Gauge
PULP
(70°
F)
22
Gauge
PULP
(120°
F)
0.9454
1.0606
1.1370
24
Gauge
PIC
(0°
F)
24
Gauge
PIC
(70°
F)
24
Gauge
PIC
(120°
F)
1.2571
1.3982
1.4917
24
Gauge
PULP
(0°
F)
24
Gauge
PULP
(70°
F)
24
Gauge
PULP
(120°
F)
1.2900
1.4324
1.5268
26
Gauge
PIC
(0°
F)
26
Gauge
PIC
(70°
F)
26
Gauge
PIC
(120°
F)
1.6751
1.8469
1.9608
26
Gauge
PULP
(0°
F)
26
Gauge
PULP
(70°
F)
26
Gauge
PULP
(120°
F)
1.6823
1.8568
1.9718
Table 9. Total Reach DDS Insertion Loss Measurements
Line Configuration
@13.3 kHz
@ 28 kHz
27
kft
26
AWG
50.12
dB
65.35
dB
36.25
kft
24
AWG
50.00
dB
62.50
dB
50
kft
22
AWG
50.24
dB
59.33
dB
