187
FCC Rules
Cumulative Leakage Index
Cumulative Leakage Index (CLI), also referred to as a “figure
of merit” measurement, is a method for assessing the leakage
integrity of a cable plant. The cable operator demonstrates
compliance with a cumulative signal leakage index by showing
either that:
and where:
r = Distance in meters (m) between the leakage source and
the center of the cable system.
ø = Fraction of the system cable length actually examined for
leakage sources. The fraction is equal to the strand miles
tested divided by total strand miles.
R = Slant height distance (m) from leakage source i to a point
3,000 meters above the center of the cable system.
E = Electric field strength in microvolts per meter (µV/m)
measured 3 meters from leak i.
n = Number of leaks found with a field strength ≥ 50 µV/m.
using either:
where:
Summary of Contents for AMM-806
Page 86: ...79 TVCB PC Installation ...
Page 93: ...86 SMI Installation Torque Patterns 1 Start Here 2 3 4 5 6 1 Start Here 2 3 4 4 PORT 8 PORT ...
Page 125: ...118 Fiber Optics Fiber Loss vs Path Length Single Mode 1550 nm ...
Page 156: ...149 Cable TV Channel Format NTSC NTSC Composite Video Waveform ...
Page 157: ...150 US Frequency Spectrum ...
Page 158: ...151 FCC Aeronautical Band Frequencies Used for Communication and Navigation ...
Page 175: ...168 Common CATV Symbols ...
Page 176: ...169 Common CATV Symbols ...
Page 177: ...170 Digital L Band Distribution Symbols ...
Page 178: ...171 Digital L Band Distribution Symbols ...
Page 183: ...176 Typical Cable Attenuation Chart in dB 100 Feet 68 F 20 C ...
Page 187: ...180 Echo Rating Graph ...
Page 188: ...181 Signal to Interference Limits Non Coherent Carriers ...
Page 190: ...183 Heterodyne Modulator Analog ...
Page 191: ...184 Heterodyne Processor Analog ...
Page 213: ...206 Multiplexers ...
Page 285: ...Rev 8 0 ...