DataNET Hub Signal Equalizer Board, Continued
Table | Selec- |
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Equalizer Board Settings |
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tion | Ratio | loss |
| SW1 |
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| SW2 |
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| 1 | 2 | 3 | 1 | 2 | 3 | 1 | 2 | 3 |
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| 1 | 1 | 0 | on | on | off | on | on | off | on | on | off |
| 2 | 1.5 | 3.5 | off | off | on | on | on | off | on | on | off |
| 3 | 2.2 | 6.8 | on | on | off | off | off | on | on | on | off |
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| 4 | 3 | 9.4 | off | off | on | off | off | on | on | on | off |
| 5 | 3.5 | 11 | on | on | off | on | on | off | off | off | on |
| 6 | 4.1 | 12.3 | off | off | on | on | on | off | off | off | on |
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| 7 | 4.8 | 13.6 | on | on | off | off | off | on | off | off | on |
| 8 | 5.2 | 14.3 | off | off | on | off | off | on | off | off | on |
Sample Calculations
Calculation One:
Assume connections to Port 1 and Port 2 only.
Port 1 cable = 1000 ft. in length
Port 2 cable = 4000 ft. in length (3000 ft. difference)
Result:
Based on Table
Port 1 requires compensation for 3000 ft. Selection 4
Calculation Two:
Assume connections to Port 1, Port 2, and Port 6 Port 6 cable = 5000 feet
Port 1 cable = 1000 ft. (5000 ft. - 1000 ft. = 4000 ft. difference) Port 2 cable = 4000 ft. (5000 ft. - 4000 ft. = 1000 ft. difference)
Result:
Based on Table
Port 6 requires no compensation. Selection 1 (0 dB loss)
Port 1 requires compensation for 4000 ft. Selection 6 (3500 - 4500) Port 2 requires compensation for 1000 ft. Selection 2 (500 - 1500 ft.)
Note that the lengths of Port 1 and Port 2 cable are the same as in Cal- culation One, however, with the addition of a longer length for Port 6, new settings are required for Port 1 and Port 2.
36 • Installation |
