Motorola BHA-100S/P-R Benutzerhandbuch

3-4 

2 

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

). 

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: 

 

 

 

 

 

 

 

 

 

 

 

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   

 

 

 

 

 

 

 

 

 

 

 

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