Configuration and Installation |
2Remove the equalizer jumper and replace it with the appropriate value equalizer. The location of the cable equalizer is shown in Figure
If system drawings are unavailable, use the following procedures to determine and install the appropriate equalizer. This procedure assumes normal input signal is present and the amplifier is operational. Measure the amplifier input signal at the input cable (IN) and measure the amplifier output signal at the amplifier output connector (OUT).
Determining the Equalizer
To determine the appropriate equalizer for use in the
1.Disconnect the input cable from the amplifier IN port.
2Measure and record the signal level of a video channel at the high end of the bandpass, generally a carrier near 550 MHz.
3Measure and record the signal level of a video channel at the low end of the bandpass.
4Reconnect the amplifier input cable.
5Subtract the measurement of step 2 from the measurement in step 3 to obtain the input tilt.
6Determine the proper cable equalizer for the
Table
Table
Starline Forward Equalizers –
Frequency (MHz) versus Insertion Loss (dB)
Equalizer | Equalizer | 50 | 200 | 300 | 450 | 550 | 650 | 750 | 870 | 1003 |
Value | Slope |
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22 | 16.3 | 17.3 | 11.6 | 9.1 | 6.0 | 4.2 | 2.5 | 1.0 |
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20 | 14.8 | 15.8 | 10.7 | 8.4 | 5.5 | 3.9 | 2.4 | 1.0 |
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18 | 13.4 | 14.4 | 9.7 | 7.6 | 5.1 | 3.6 | 2.2 | 1.0 |
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16 | 11.9 | 12.9 | 8.7 | 6.9 | 4.6 | 3.3 | 2.1 | 1.0 |
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14 | 10.4 | 11.4 | 7.8 | 6.1 | 4.2 | 3.0 | 2.0 | 1.0 |
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12 | 8.9 | 9.9 | 6.8 | 5.4 | 3.7 | 2.7 | 1.8 | 1.0 |
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10 | 7.4 | 8.4 | 5.8 | 4.7 | 3.3 | 2.4 | 1.7 | 1.0 |
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8 | 5.9 | 6.9 | 4.9 | 3.9 | 2.8 | 2.1 | 1.6 | 1.0 |
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6 | 4.5 | 5.5 | 3.9 | 3.2 | 2.4 | 1.9 | 1.4 | 1.0 |
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4 | 3.0 | 4.0 | 2.9 | 2.5 | 1.9 | 1.6 | 1.3 | 1.0 |
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2 | 1.5 | 2.5 | 2.0 | 1.7 | 1.5 | 1.3 | 1.1 | 1.0 |
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22 | 16.7 | 17.7 | 12.4 | 10.0 | 7.1 | 5.4 | 3.9 | 2.5 | 1.0 |
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20 | 15.2 | 16.2 | 11.4 | 9.2 | 6.5 | 5.0 | 3.6 | 2.3 | 1.0 |
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