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标题：L-PAD
1楼
helen0507 发表于：2008-8-22 21:09:30請教各位DX, 哪裡有L-PAD銷售？
2楼
XLB 发表于：2008-8-23 10:02:12L-PAD为何物
3楼
Acoustics 发表于：2008-8-24 18:23:05  |
For attenuation A use here a negative dB value as convention.
Calculate the resistor network
The calculator below needs a positive value for A in dB
Calculate the attenuation
| dB | Z | R1 (ohms) | R2 (ohms) |
| -3 | 4 | 1.17 | 9.70 |
| -6 | 4 | 2.00 | 4.02 |
| -9 | 4 | 2.58 | 2.20 |
| -12 | 4 | 3.00 | 1.34 |
| -15 | 4 | 3.29 | 0.87 |
| -3 | 8 | 2.34 | 19.39 |
| -6 | 8 | 3.99 | 8.04 |
| -9 | 8 | 5.16 | 4.40 |
| -12 | 8 | 5.99 | 2.68 |
| -15 | 8 | 6.58 | 1.73 |
4楼
helen0507 发表于：2008-8-25 15:27:03在哪裡可以買到？
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