Proof-of-Performance


Facts and Fiction


These are the facts. Click on the Rule of your choice and
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additional facts or myths about these tests.

RULE STANDARD NUMBER of CHANNELS TEST REPETITION
76.605(a)(3)
Aural Carrier
Frequency
4.5MHz +/- 5KHz headend
to subscribers terminal
Minimum of 4 channels
5 channels to 216MHz
6 channels to 300MHz
+1 per 100MHz above 300
Biannual
Not to exceed 7 months
76.605(a)(4)
Minimum Visual
Carrier Level
0dBmv at sub. terminal
3dBmv at end of 100'
drop connected to tap
All Channels Biannual
76.605(a)(5)
Visual carrier level
24 hour variation
Not to vary more
than 8dB within any
6 month interval
All Channels July or August. December
or January. 1 test each
channel every 6 hours
for each 24 hour test.
76.605(a)(5)( i )
Maximum visual signal
level of adjacent
channel
Within 3dB of
any visual carrier
within 6MHz
All Channels July or August. December
or January. 1 test each
channel every 6 hours
for each 24 hour test.
76.605(a)(5)( ii )
Min/Max bandwidth
visual carrier level
Within 10dB to
300MHz +1dB per
100MHz above 300
All Channels July or August. December
or January. 1 test each
channel every 6 hours
for each 24 hour test.
76.605(a)(5)( iii ) A maximum level that
will not overload the
sub's receiver
All Channels Biannual
76.605(a)(6)
Aural carrier level
10 to 17dB below
the associated visual
signal level. Baseband
converter: 6.5 to 17dB
All Channels Biannual
76.605(a)(7)
Amplitude characteristic
of a single CATV
channel
( in-channel response )
+/-2dB from .75 to
5MHz at tap. At sub's
terminal after 12/30/99
Minimum of 4 channels
5 channels to 216MHz
6 channels to 300MHz
+1 per 100MHz above 300
Biannual
76.605(a)(8)( iii )
Carrier-to-Noise
Carrier-to-Noise shall
not be less than 43dB
Minimum of 4 channels
5 channels to 216MHz
6 channels to 300MHz
+1 per 100MHz above 300
Biannual
76.605(a)(9)( i )
Visual signal-to-
coherent Beats
Not less than 51dB for noncoherent systems Minimum of 4 channels
5 channels to 216MHz
6 channels to 300MHz
+1 per 100MHz above 300
Biannual
76.605(a)(10)( ii )
Terminal Isolation
Not less than 18dB (mfg.
specs.) and prevents
subscriber reflections
All Channels Provide specs. in proof
76.605(a)(11)
Hum
Not to exceed 3%
of the signal level
1 channel Biannual
76.605(a)(12)( i )
Chroma-Luma Delay
Within 170nS Minimum of 4 channels
5 channels to 216MHz
6 channels to 300MHz
+1 per 100MHz above 300
Biannual
76.605(a)(12)( ii )
Differential Gain
Not to exceed 20% Minimum of 4 channels
5 channels to 216MHz
6 channels to 300MHz
+1 per 100MHz above 300
Biannual
76.605(a)(12)( iii )
Differential Phase
Not to exceed +/-10 deg. Minimum of 4 channels
5 channels to 216MHz
6 channels to 300MHz
+1 per 100MHz above 300
Triennial
76.605(a)(13)
Signal Leakage
less than 54MHz
=15mv/m at 30m
54-216=20mv/m at 3m
greater than 216MHz
=15mv/m at 30m
All Channels Quarterly

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