1.4.5.1
Receiver Termination Signal Level
Each termination for a TV receiver must have a minimum signal level of 0
decibel millivolts (dBmV) (1000 microvolts) at 55 MHz and of 0 dBmV (1000
microvolts) at 750 MHz and a maximum signal of 15 dBmV or a level not to
overload the receiver for the entire system bandwidth.
1.4.5.2
Distribution System
a.
Modulation distortion at power frequencies:
4 percent or less hum
distortion;
b.
Composite third order distortion for:
(1)
CW carriers:
53 dB.
(2)
Modulated carriers:
59 dB.
c.
Subscriber terminal isolation:
18 dB or greater.
d.
Carrier to second order beat ratio:
60 dB.
e.
Amplitude characteristic shall be within a range of plus or minus
2 decibels from 0.75 MHz to 5.0 MHz above the lower boundary
frequency of the cable television channel, referenced to the
average of the highest and lowest amplitudes within these
f.
Visual, aural carrier level - 24-hour variation:
47 CFR 76.605,
subpart (a), rules (4), (5), and (6).
g.
47 CFR 76.605, subpart (a), rules
(1),(2), and (3).
1.4.5.3
All New System Tolerance
The system shall not show a serious loss of carrier to noise when the
system levels are lowered 3 dB below normal or a significant distortion
when the levels are increased 3 dB above normal, as observed on a TV set
located at the far end extremities of the system.
1.5
SUBMITTALS
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NOTE: Submittals must be limited to those necessary
for adequate quality control. The importance of an
item in the project should be one of the primary
factors in determining if a submittal for the item
should be required.
A "G" following a submittal item indicates that the
submittal requires Government approval. Some
submittals are already marked with a "G". Only
delete an existing "G" if the submittal item is not
complex and can be reviewed through the Contractor's
submittal is sufficiently important or complex in
context of the project.
SECTION 16783N
Page 7