3 — ONT and MDU general and interface technical specifications
Alcatel-Lucent 7302 ISAM | 7330 ISAM FTTN | 7360 ISAM FX ONT R04.06.02 November 2013 3-17
3FE 55873 AAAA TCZZA Edition 01
ONT Product Information Guide
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 3-7.
Table 3-7 Typical cable attenuation loss value based on frequency
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.
Frequency (MHz) RG-6 coaxial per 100 ft (30.48
m) (dB)
RG-59 coaxial per 100 ft (30.48
m) (dB)
50 1.9 2.4
100 2.7 3.4
200 4.1 4.9
400 5.9 7.0
700 8.1 9.7
900 9.4 11.1
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.
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