Motorola BT100 operation manual STARLINE Cable Simulators, Frequency, Cable slope in dB

Amplifier Setup 3-5

When selecting an equalizer, choose the next lower value if the exact value is not available or in cases where the calculated value makes two choices possible.

To determine the proper cable for bench testing, subtract the interstage equalizer value (14 dB) from the cable connected to its input. The output is flat with a flat signal source.

Because of errors in cable attenuation, slope in passive devices, and other independent variables, you may need to change the final value of the equalizer before you install the BT100.

STARLINE Cable Simulators

STARLINE cable simulators, model SCS-*, are used in place of fixed equalizers in systems where: (1) the amplifiers are located close together, (2) there are large amounts of flat loss from passive components, or (3) it is necessary to compensate for reverse cable tilt. The simulators fit in the same location as the equalizers.

Table 3-2 and Figure 3-2 help you choose the correct simulators:

Table 3-2

Starline cable simulators

SCS-*	1	2	3	4	5	6	7	8	9	10
Frequency
					Cable slope in dB
40 MHz	0.0	0.1	0.1	0.1	0.2	0.2	0.3	0.3	0.3	0.4
45 MHz	0.0	0.0	0.1	0.1	0.1	0.1	0.1	0.1	0.2	0.2
50 MHz	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0
72 MHz	-0.1	-0.2	-0.2	-0.3	-0.4	-0.4	-0.5	-0.6	-0.7	-0.7
108 MHz	-0.1	-0.3	-0.4	-0.5	-0.6	-0.8	-0.9	-1.0	-1.2	-1.3
150 MHz	-0.2	-0.5	-0.7	-0.9	-1.2	-1.4	-1.6	-1.9	-2.1	-2.3
211 MHz	-0.3	-0.7	-1.0	-1.4	-1.7	-2.1	-2.4	-2.8	-3.1	-3.5
250 MHz	-0.4	-0.8	-1.2	-1.7	-2.1	-2.5	-2.9	-3.3	-3.7	-4.1
300 MHz	-0.5	-1.0	-1.5	-1.9	-2.4	-2.9	-3.4	-3.9	-4.4	-4.9
350 MHz	-0.6	-1.1	-1.7	-2.2	-2.8	-3.3	-3.9	-4.4	-5.0	-5.5
400 MHz	-0.6	-1.2	-1.8	-2.5	-3.1	-3.7	-4.3	-4.9	-5.5	-6.2
450 MHz	-0.7	-1.4	-2.0	-2.7	-3.4	-4.1	-4.7	-5.4	-6.1	-6.8
550 MHz	-0.8	-1.6	-2.4	-3.2	-4.0	-4.8	-5.5	-6.3	-7.1	-7.9
750 MHz	-1.0	-2.0	-3.0	-4.0	-5.0	-6.0	-7.0	-8.0	-9.0	-10.0
870 MHz	-1.1	-2.2	-3.3	-4.4	-5.5	-6.7	-7.8	-8.9	-10.0	-11.1
1003 MHz	-1.2	-2.5	-3.7	-4.9	-6.2	-7.4	-8.7	-9.9	-11.1	-12.4
50 MHz loss (typical)	-1.0	-1.0	-1.0	-1.0	-1.0	-1.0	-1.0	-1.0	-1.0	-1.0

BT100 Installation and Operation Manual