Configuration Recommendations; 14 Dbmv Rf Video Receivers - Alcatel-Lucent 7302 Information Manual

3 — ONT and MDU general and interface technical specifications

Configuration recommendations

You can control the quality of the output signal to the subscriber by specifying a
number of parameters:
•
If the ONT operates in AGC mode, you can specify the measurement offset to
control the gain of the output signal, which ensures some measure of
performance.
•
You can set high and low optical power level thresholds for the downstream
signal. An alarm is raised if either the high or the low optical power level
threshold is crossed.
Consider the following before configuring RF video services:
ONTs supporting RF video come with a 75 Ω (F-type) coaxial interface
•
connector. You may have to install the 75 Ω coaxial F connector on the video
cable.
•
The F-type coaxial interface is typically connected to a four-way splitter in the
home.
•
You must use either RG-6 or RG-59 coaxial cable within the home.
•
Ensure proper attenuation is inserted at the coaxial output to guarantee the
following at the end of any coaxial drop:
•
•
•
Tilt is a measure of the gain at the highest frequency relative to the lowest
frequency. For example, if a receiver has a tilt of 5 dB, the RF level at 50 MHz
may be 16 dBmV, the RF level at 450 MHz will be about 18 dBmV, and the RF
level at 870 MHz will be (16 dBmV + 5 dB) = 21 dBmV. Tilt is an attempt to
provide more gain at higher frequencies, to compensate for the higher loss at
higher frequencies of typical RG-6 or RG-59 coaxial cable.
RF video service configuration requires the use of TL1 commands. These commands
are issued at the P-OLT craft terminal.

14 dBmV RF video receivers

Table
RF video features
RF output level
RF slope correction (tilt)
Optical power range
CNR
CSO/CTB
MER
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3-18 November 2013
video signal is below 15.5 dBmV
audio signal is below 2.55 dBmV per channel
3-8 lists RF video interface specifications for ONTs with a 14 dBmV receiver.
Table 3-8 RF video service specifications for ONTs with 14 dBmV receivers
Alcatel-Lucent 7302 ISAM | 7330 ISAM FTTN | 7360 ISAM FX ONT R04.06.02
Specifications
+14 dBmV @ 450 MHz using a per analog channel
measurement at the ONT output
5 to 8 dB from 50 to 870 MHz
+ 1.0 to –6.0 dB
45 dB
53 dB
32 dB
Edition 01 3FE 55873 AAAA TCZZA
ONT Product Information Guide
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