Proof of Preformance 16 Flashcards
When did the FCC create POP current standards
December 30, 1992
There are six test points for up to
12,500 subscribers
Add one test point for each additional
12,500 subscribers.
Systems with less than___customers are not required to do POP testing as long as they have a high confidence level that their network can meet the standards.
1,000
Many of the FCC POP standards require that you take measurements at the end of a
100 foot test drop.
The tests must be made on a minimum of _____ channels
four (4)
The tests must be made on a minimum of four (4) channels plus one additional channel for every
100 MHz
Hum is not frequency-specific; only ___ analog channel per test point needs to be tested.
one
FCC POP testing applies to ____channels ONLY
analog
Color Performance tests are done once every
three years.
Video Carrier Level Stability (24-hour) test are done twice a year, when?
January and July
Color Performance tests are usually performed by a
Head End Technician
A spectrum analyzer feature that allows the user to make otherwise intrusive FCC POP tests in a non-intrusive manner.
gated testing
(EIA)
Electronic Industry Association
The FCC requires that audio carrier frequency for each channel must be
4.5 MHz above the video carrier frequency, ± 5 kHz.
Before you measure In-Channel Response, you must either locate a channel that has a
quiet line with a test signal on it
The FCC requires that Carrier-to-Noise (C/N) ratio must be at least
43 dB at each test point.
Hum Modulation is a low frequency signal, which the FCC states must be
less than 3% of the video carrier level
Chrominance to Luminance Delay Inequality – Must be within
170 nanoseconds
Differential Gain (of the color subcarrier) – Must be within
± 20 %.
Differential Phase (of the color subcarrier) – Must be within
± 10 degrees
Monitor entire plant on a continuous basis. Cable system operators must maintain a log of all leaks of 20 microvolts or greater (measured from 3 meters) and repair any leaks within a reasonable timeframe.
Continuous Monitoring
Monitor entire plant once per quarter. Quarterly monitoring has the same logging and repair requirements as continuous monitoring.
Quarterly Monitoring (Rideout)
Determine a ground-based Cumulative Leakage Index (CLI) once every twelve months, based on a sampling of at least
75 % of the cable strand.
A low-pass filter that smoothes out the RF energy after it has passed through the RBW filter.
Video Bandwidth Filter (VBW)
terminal isolation should be not be less than
18dB
