Signal Equalizer Settings for Non Recommended Cable or Unknown Cable Lengths, Continued
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| 3. cont | The next strongest signal is on port 6. 4.8/1.25 = 3.84 | ||||
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| 20 log of 3.84 = 11.7 dB | ||||
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| ratio of 3.84 | ||
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| Since this signal is 11.7 dB stronger than the signal on port 4, | ||||
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| the attenuator board on port 6 needs to be set to selection 5 | ||||
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| (11 dB loss). This should put this signal at about 0.7 dB | ||||
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| above the signal on port 4. (Selection 6 could also be used | ||||
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| for 12.3 dB loss if several of the other boards had been set | ||||
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| for signals slightly below the port 4 signal level.) | ||||
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4. | Ensure that the responses on all ports are within 3 dB of each | |||||
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| Port # | Resulting signal level refer- | ||
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| enced to port 4 |
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| 1 | + 2.1 dB | |||
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| 2 | - 0.6 dB | |||
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| 4 | 0 dB | |||
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| 6 | + 0.7 dB | |||
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| 8 | + 0.1 dB | |||
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Installation • 41 |
