Signal Leakage (Signal Leakage Measurements)

Question 1

Ingress

Answer 1

Noise and RF energy getting into the cable system

Question 2

Signal leakage measurement

Answer 2

microvolt per meter

Question 3

Leakage limits between 54 and 216 MHz

Answer 3

20 microvolts at 10 feet/3 meters

Question 4

Leakage limits between 0 and 54 MHz and above 216 MHz

Answer 4

15 microvolts @ 100 feet/30.48 Meters

Question 5

CLI

Answer 5

Cumulative leakage index

Question 6

How often should the CLI rideout be done

Answer 6

Quarterly

Question 7

54-216 MHz

Answer 7

20 uV/M at 10 ft

Question 8

0-54 MHz and above 216 MHz

Answer 8

15 uV/M @ 100 ft

Question 9

All leaks at or greater than __ µV/m must be logged and fixed

Answer 9

20

Question 10

Only leaks above __ µV/m are used in the CLI calculation.

Answer 10

50

Question 11

This measurement is made with an off-air receiver with a 50-ohm characteristic impedance and is the standard unit of measure for the Cumulative Leakage Index

Answer 11

microvolts per meter (µV/m)

Question 12

states that any leakage source which produces a field strength of 20 uV/m or greater at a distance of 3 meters in the aeronautical radio frequency bands shall be noted and such leakage sources shall be repaired within a reasonable period of time.

Answer 12

FCC part 76.614