DRAKE VMM860AG Handbuch - Seite 3
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BROADCAST TV CHANNEL OUTPUT FREQUENCIES
CATV
TABLE 2: BC TV
CATV
BC
TV
+100
VHF BROADCAST CHANNELS
VHF BROADCAST CHANNELS
VHF BROADCAST CHANNELS
VHF BROADCAST CHANNELS
VHF BROADCAST CHANNELS
Visual Carrier
Channel Number
Frequency (MHz)
2
55.25
61.25
3
4
67.25
77.25
5
6
83.25
175.25
7
8
181.25
187.25
9
10
193.25
199.25
11
12
205.25
211.25
13
CATV
CATV
BC
TV
+100
UHF BROADCAST CHANNELS
UHF BROADCAST CHANNELS
UHF BROADCAST CHANNELS
UHF BROADCAST CHANNELS
UHF BROADCAST CHANNELS
Visual Carrier
Channel Number
Frequency (MHz)
471.25
14
477.25
15
483.24
16
489.25
17
495.25
18
501.25
19
507.25
20
513.25
21
519.25
22
525.25
23
531.25
24
537.25
25
543.25
26
549.25
27
555.25
28
561.25
29
567.25
30
573.25
31
579.25
32
585.25
33
591.25
34
597.25
35
603.25
36
609.25
37
615.25
38
621.25
39
627.25
40
633.25
41
639.25
42
645.25
43
651.25
44
657.25
45
663.25
46
669.25
47
675.25
48
681.25
49
50
687.25
693.25
51
52
699.25
705.25
53
54
711.25
717.25
55
56
723.25
729.25
57
58
735.25
741.25
59
60
747.25
753.25
61
62
759.25
765.25
63
64
771.25
777.25
65
66
783.25
789.25
67
68
795.25
801.25
69
REAR PANEL CONNECTIONS / INTERNAL JUMPERS
R1 - VIDEO INPUT Connector
This is the nominal 1 Vp-p baseband video
input to the modulator.
R2 - AUDIO INPUT Connector
This is an unbalanced audio input to the
modulator circuits. This "RCA" (phono)
connector input accepts mono audio from 125
mVrms to 2.5 Vrms levels. If the MMTS20
stereo encoder is used, this input accepts the
composite BTSC stereo output of the MMTS20.
R3 - DC INPUT Connector
This 3-pin connector (Male) accepts the
appropriate mating DC power cable.
R1
R2
R5
VIDEO INPUT
FLAT
NORM
AUDIO INPUT
R3
+5V
+12V
GND
DC INPUT
R4
RF OUT
Figure 2
R4 - RF OUTPUT Connector
This is the modulator output.
R5 - AUDIO PRE-EMPHASIS SWITCH
This switch allows selection of either normal
audio pre-emphasis or flat audio response. For
normal mono audio, input to the modulator via
R2, set switch to NORM position. If the
MMTS20 BTSC stereo encoder is used, set this
switch to FLAT and connect stereo audio to the
MMTS20. The encoder will in turn connect to
R2.
INTERNAL JUMPER SETTING: STD, HRC, IRC
STD
HRC
IRC
Figure 3
3