其中:
VC1,VC10,VC2,VC20,VC3,VC30,VC40,VC50分别为数据控制端
RF1和RF2分别为信号输入输出端。表2所列是AT-280的真值表。
表2 AT-280真值表
控 制 输 入 | ||||||||
VC5 0 | VC4 0 | VC3 0 | VC3 | VC2 0 | VC2 0 | VC1 0 | VC 1 | 衰减(dB) |
1 | 1 | 1 | 0 | 1 | 0 | 1 | 0 | 参考 |
0 | 1 | 1 | 0 | 1 | 0 | 1 | 0 | 0.5dB |
1 | 0 | 1 | 0 | 1 | 0 | 1 | 0 | 1.0dB |
1 | 1 | 0 | 1 | 1 | 0 | 1 | 0 | 2.0dB |
1 | 1 | 1 | 0 | 1 | 1 | 1 | 0 | 4.0dB |
1 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 8.0dB |
0 | 0 | 0 | 1 | 1 | 1 | 0 | 1 | 15.5dB |
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