CABLE TV CHANNELS
Channel
Number
Center of
EIA/NCTA
Numeric
Equivalent
Frequency
in MHz
3
4
5
63
69
79
96
97
98
99
105
111
15
16
17
129
135
141
20
21
159
165
8
9
10
11
12
183
189
195
201
207
24
25
26
225
231
237
29
30
31
255
261
267
33
34
35
285
291
CABLE TV CHANNELS
Channel
Center of
Channel
EIA/NCTA
Numeric
Equivalent
Frequency
in MHz
38
39
40
309
315
321
42
43
44
45
339
345
351
48
49
50
369
375
381
53
54
55
399
405
411
57
58
59
60
429
435
441
62
63
64
65
459
465
471
68
69
70
489
495
501
73
74
75
519
525
531
78
549
Channel
Center of
EIA/NCTA
Numeric
Equivalent
Frequency
in MHz
80
81
82
561
567
573
85
86
87
591
597
603
90
91
92
621
627
633
100
101
102
651
657
663
104
105
106
107
675
681
687
693
110
111
112
711
717
723
115
116
117
741
747
753
120
121
122
771
777
783
125
126
127
801
807
813
130
131
132
831
837
843
CONNECTIONS AND CONTROLS
All connections to and from each upconverter
are made thro ugh the rear panel.
DESCRIPTION
Figure 3 sho ws a typical installation utilizing 4
DUC864 upconverters used with 4 TMQAM
modulators. A PS8 power supply module is
used to power all units.
RACK MOUNTING
Adequate ventilation is very important in
multichannel installations. Units should be
spaced apart by at least o ne panel height
wherever possible, and some air movement is
mandatory in enclosed rack cabinets. Exces-
sive heat will shorten component life and
modulator performance will be degraded
without
proper cooling.
DUC864
UPCONVERTERS
QAM MODULATOR
UNITS
IF IN
POWER
+12 V
GND
+5 V
44 MHz
IF O U T P UT
ASI T RANSPO RT
STREA M
INPUT
POWER
IF IN
POWER
+12 V
GND
+5 V
44
MHz
IF O U T P UT
ASI T RANSPO RT
STREA M INP UT
POWER
IF IN
POWER
+12 V
GND
+5 V
44 MHz
IF O U T P UT
ASI T RANSPO RT
STREA M
INPUT
POWER
IF IN
POWER
+12 V
GND
+5 V
44 MHz
IF O U T P UT
ASI T RANSPO RT
STREA M
INPUT
10 0- 240
V
~
50 /6 0 Hz
85
WATTS
PO WE R
DC O UTPUT S X 8
12V GND 5V
RF O UT
+12 V
GND
+5 V
RF O UT
+12 V
GND
+5 V
RF O UT
+12 V
GND
+5 V
RF O UT
+12 V
GND
+5 V
DC
OUTPU T
RAT ING.
TOTAL
OF ALL OUTPUT S:
+5V:6 A
MAX.
+12V:2.5A
MAX.
FROM SATELLITE
DEMODULATOR OR
OTHER ASI DATA
STREAM
TO QAM
DISTRIBUTION
Figure 3
AC POWER
CONNECTOR
(8 paginas)
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