Motorola Broadband House Amplifier BHA-100K/P-R User Manual download pdf (Page 19)

3-4 Configuration and Installation

Remove the equalizer jumper and replace it with the appropriate value equalizer. The

location of the cable equalizer is shown in

Figure 3-2.

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 BHA-100*:

1. Disconnect the input cable from the amplifier

IN port.

2 Measure and record the signal level of a video channel at the high end of the bandpass,

generally a carrier near 550 MHz.

3 Measure and record the signal level of a video channel at the low end of the bandpass.

4 Reconnect the amplifier input cable.

5 Subtract the measurement of step 2 from the measurement in step 3 to obtain the input tilt.

6 Determine the proper cable equalizer for the BHA-100*.

Table 3-1 helps you choose the correct equalizer and also lists insertion loss at various

frequencies:

Table 3-1

Starline Forward Equalizers – SFE*-*

Frequency (MHz) versus Insertion Loss (dB)

Equalizer

Value

Equalizer

Slope

50 200 300 450 550 650 750 870 1003

SFE-75-

16.3 17.3 11.6 9.1 6.0 4.2 2.5 1.0

14.8 15.8 10.7 8.4 5.5 3.9 2.4 1.0

13.4 14.4 9.7 7.6 5.1 3.6 2.2 1.0

11.9 12.9 8.7 6.9 4.6 3.3 2.1 1.0

10.4 11.4 7.8 6.1 4.2 3.0 2.0 1.0

8.9 9.9 6.8 5.4 3.7 2.7 1.8 1.0

7.4 8.4 5.8 4.7 3.3 2.4 1.7 1.0

5.9 6.9 4.9 3.9 2.8 2.1 1.6 1.0

4.5 5.5 3.9 3.2 2.4 1.9 1.4 1.0

3.0 4.0 2.9 2.5 1.9 1.6 1.3 1.0

1.5 2.5 2.0 1.7 1.5 1.3 1.1 1.0

SFE-87-

16.7 17.7 12.4 10.0 7.1 5.4 3.9 2.5 1.0

15.2 16.2 11.4 9.2 6.5 5.0 3.6 2.3 1.0

BHA-100* Broadband House Amplifier Installation Manual

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Motorola Broadband House Amplifier BHA-100K/P-R User Manual Page 19

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