²úÆ·½éÉÜ
¸ÃϵÁеçÀ½ÓÄÉÍâµ¼Ìå±àÖ¯×Ý°ü¹¤ÒÕ£¬¹ã·ºÓ¦ÓÃÓÚCATV¡¢ÎÀÐǽÓÊÕ¡¢HFCÍøÂç´«Êäϵͳ¡¢ÖÕ¶ËÓû§·ÖÅÉϵͳ£¬Ò²¿ÉÓÃÓÚ¿íƵ´øÍøÂçÖд«ÊäÊý¾Ý¡¢µçÊÓ¡¢µç»°ºÍÅÌËã»úµÈͨѶϵͳ¡£
²úÆ·Ìصã
¸ÃϵÁвúÆ·¾ßÓд«Ê书ÂÊ´ó¡¢µçѹפ²¨±ÈµÍ¡¢´«ÊäËðºÄµÍ£¬ÈáÈí¶È¸ß¡¢ÍäÇúÐÔÄܺã¬ÄͺòÐԺõÈÌص㡣
¼¼Êõ²ÎÊý
ÐͺÅ
RG59
RG6
RG11
ÄÚµ¼Ì壨mm£©
0.81
1.02
1.63
¾øÔµ£¨mm£©
3.66
4.57
7.11
Íâµ¼Ì壨mm£©
4.5
5.41
8.71
»¤Ì×£¨mm£©
6.1
6.93
10.4
×ԳеõÏߣ¨mm£©
1.3
1.83
¹«³Æ±àÖ¯ÁýÕÖÂÊ
60%-95%
µçÆøÐÔÄܵçÈÝ£¨Nf/km£©
50¡À3
×迹£¨¦¸£©
75¡À3
´«ÊäËÙÂÊ£¨%£©
83
84
ƵÂÊ
Ë¥¼õ£¨dB/100M£©
5MHz
2.82
1.9
1.25
55MHz
6.73
5.25
3.15
211MHz
12.47
10
6.23
250MHz
13.45
10.82
6.72
300MHz
14.6
11.64
7.38
350MHz
15.75
12.63
7.94
400MHz
16.73
13.61
8.53
450MHz
17.72
14.43
9.02
500MHz
18.7
15.29
9.51
550MHz
19.52
16.08
9.97
750MHz
22.87
18.54
11.97
870MHz
24.85
20.04
13.31
1000MHz
26.64
21.49
14.27
1450MHz
32.22
25.89
17.36
1750MHz
35.83
28.67
2050MHz
38.78
31.04
21.13
2250MHz
40.62
32.51
22.18
2500MHz
42.81
34.25
23.36
3000MHz
46.92
37.53
25.62
¸ÃϵÁеçÀ½ÓÄÉÍâµ¼ÌåÂÁ¹ÜÕûÌå¼·³ö¹¤ÒÕ£¬Ö÷ÒªÓÃ×÷CATVÖ÷¸ÉÏß¹¤³Ì£¬×÷ΪÐźŴ«ÊäÏß¡£
¸ÃϵÁвúÆ·¾ßÓд«Ê书ÂÊ´ó¡¢µçѹפ²¨±ÈµÍ¡¢´«ÊäËðºÄµÍ£¬ÍäÇúÐÔÄܺã¬×èË®ÐÔÄܺᢲ»Ò×Êܳ±µÈÌص㡣
LB412
LB500
LB565
LB625
LB750
2.26
2.77
3.28
3.48
4.24
9.19
11.43
13.20
14.35
17.27
10.46
12.70
15.88
19.05
12.07
14.22
15.86
17.40
20.83
4.78
75¡À2
87
Ë¥¼õ£¨dB/100m£©
0.65
0.52
0.46
0.43
0.36
1.77
1.54
1.51
1.21
4.62
3.58
3.12
3.02
2.43
5.05
3.94
3.38
2.66
5.57
4.30
3.71
3.54
2.92
6.13
4.69
4.04
3.87
3.18
6.46
5.02
4.33
4.17
3.45
6.92
5.35
4.59
4.43
3.67
7.34
5.67
4.89
7.71
6.27
5.12
5.18
9.12
7.09
6.07
5.84
4.86
9.87
7.68
6.56
6.33
5.28
10.73
8.27
7.12
6.79
5.71
¸ÃϵÁеçÀ½ÓÄÉÍâµ¼ÌåÂÁ´øº¸½Ó¹¤ÒÕ£¬Ö÷ÒªÓÃ×÷CATVÖ÷¸ÉÏß¹¤³Ì£¬×÷ΪÐźŴ«ÊäÏß¡£
Lb540
Lb715
Lb860
4.22
5.16
13.03
17.42
21.03
13.72
18.16
21.84
15.49
19.94
24.38
0.3
1.18
1.05
2.1
2.3
2.49
4.03
2.72