Alcatel-Lucent 7330 Product Information Manual page 91

For example: +18 - 8 - 7 = +3 dBmV.
+ 18 dBmV (at the ONT at 870 MHz) - 8 dB (splitter) - XX dBmV (RG-59
cable loss at the highest frequency based on cable type, for example
870 MHz would be -11 dB) = Final dBmV (at set-top box or TV)
For example: +19 - 8 - 11 = -1 dBmV.
The cable attenuation loss is based on the frequency and the type of cable used, as
listed in Table 3-6.
Frequency (MHz)
50
100
200
400
700
900
Be sure to properly plan and design the RF video deployment at the customer site.
The following is an example of a properly planned and designed RF video
deployment. Based on 900 MHz frequency and 100 ft (30.48 m) of cable length, 0.6
dBmV is reached at the set-top box using RG-6 coaxial cable:
+18 dBmV - 8 dB - 9.4 dB = + 0.6 dBmV
The following is an example of an improperly planned and designed RF video
deployment. Based on 900 MHz frequency and 100 ft (30.48 m) of cable length, -
1.1 dBmV is reached at the set-top box using RG-59 coaxial cable:
+18 dBmV - 8 dB - 11.1 dB = -1.1 dBmV therefore should not be used.
Alcatel-Lucent 7330/7302 ISAM FTTN R04.02.41
3FE 54017 AAAA TCZZA
3 — ONT and MDU general and interface technical specifications
Table 3-6 Typical cable attenuation loss value based on frequency
RG-6 coaxial per 100 ft (30.48
m) (dB)
1.9
2.7
4.1
5.9
8.1
9.4
Note —
It is the responsibility of the customer installation crew to
ensure proper on-site layout of video distribution by verifying that the
output power at the end devices, such as the TV, VCR, and STB, is
between 0 to the limit of the ONT or MDU receiver's dBmV.
December 2010
Edition 01 ONT Product Information Guide
RG-59 coaxial per 100 ft (30.48
m) (dB)
2.4
3.4
4.9
7.0
9.7
11.1
3-15