need amplification. For the high-frequency RF signal haves signal attenuation, signal strength will
become weakened after adding CATV network mixer and multi output.
2.
If the signal frequency is high, the transmission attenuation is greater.
So choose low channel for
long-distance transmission. Otherwise, When the transmission distance is short (less than 100
meters), because the signal is too strong, receiver may protect and can
’t output normal.
So now you
should choose high channel or adding attenuator in coaxial cable for the signal attenuation.
3.
If the output contents of the signal source contains HDCP key, the RF signal of the modulator output
will automatically encrypted also. Then, If you use ordinary DVB-T receiver will not Decoding and
output, only use the special receiver to the output normally.
4.
With the channel set and frequency values refer to the table below, and channel selection switch
setting method is as follows:
e.g.1 CH1
（
0000 0001
）
e.g.2 CH11
（
0001 0001
）
Channel set and frequency reference table
Channel
ID
Switch Setting
（
12345678
）
Frequency
（
MHz
）
BW
（
MHz
）
Channel
ID
Switch Setting
（
12345678
）
Frequency
（
MHz
）
BW
（
MHz
）
1
0000 0001
142.5
7
41
0100 0001
634
8
2
0000 0010
149.5
7
42
0100 0010
642
8
3
0000 0011
156.5
7
43
0100 0011
650
8
4
0000 0100
163.5
7
44
0100 0100
658
8
5
0000 0101
177.5
7
45
0100 0101
666
8
6
0000 0110
184.5
7
46
0100 0110
674
8
7
0000 0111
191.5
7
47
0100 0111
682
8
8
0000 1000
198.5
7
48
0100 1000
690
8
9
0000 1001
205.5
7
49
0100 1001
698
8
10
0001 0000
212.5
7
50
0101 0000
706
8
11
0001 0001
219.5
7
51
0101 0001
714
8
12
0001 0010
226.5
7
52
0101 0010
722
8
13
0001 0011
410
8
53
0101 0011
730
8
14
0001 0100
418
8
54
0101 0100
738
8
15
0001 0101
426
8
55
0101 0101
746
8
16
0001 0110
434
8
56
0101 0110
754
8
17
0001 0111
442
8
57
0101 0111
762
8
18
0001 1000
450
8
58
0101 1000
770
8
19
0001 1001
458
8
59
0101 1001
778
8
20
0010 0000
466
8
60
0110 0000
786
8
21
0010 0001
474
8
61
0110 0001
794
8
