Cisco Cisco 1 GHz GainMaker Amplifier データシート
Data Sheet
Page 6 of 9
Reverse Equalizers
Reverse equalizers produce a tilted frequency response opposite of that produced by coaxial
cables. They are normally used during station balancing to counteract the tilt produced by coaxial
cables, in order
to achieve desired tilt. An equalizer’s “dB value” indicates the amount of tilt (in dB
at rated high frequency) the equalizer is designed to offset. The dB value and rated high frequency
(40, 42, 55, or 65 MHz) are printed on the top of each equalizer. The amount of tilt (in dB) that the
equalizer produces from low to high frequency is printed on the side of each equalizer.
Table 7.
Reverse Equalizers - 42 MHz EQs are used in GainMaker amplifiers with either a 40/52 or 42/54
MHz reverse/forward bandsplit. Both the 42 MHz and the 40 MHz EQ values are printed on the top
of each 42 MHz reverse equalizer.
MHz reverse/forward bandsplit. Both the 42 MHz and the 40 MHz EQ values are printed on the top
of each 42 MHz reverse equalizer.
EQ Value
(dB)
40 MHz
40 MHz
EQ Value
(dB)
42 MHz
(dB)
42 MHz
Part
Number
Typical Insertion Loss (dB)
5 MHz
40 MHz
42 MHz
0
0
712719
-
-
-
1
1
589628
1.7
1.0
1.0
2
2
589629
2.3
1.0
1.0
3
3.1
589630
3.0
1.0
0.9
4
4.1
589631
3.6
1.0
0.9
5
5.1
589632
4.3
1.0
0.9
6
6.1
589633
4.9
1.0
0.9
7
7.2
589634
5.6
1.0
0.8
8
8.2
589635
6.2
1.0
0.8
9
9.2
589636
6.9
1.0
0.8
10
10.2
589637
7.5
1.0
0.8
11
11.3
589638
8.2
1.0
0.7
12
12.3
589639
8.9
1.0
0.7
Table 8.
Reverse Equalizers - 55 MHz EQs are used in GainMaker amplifiers with a 55/70 MHz
reverse/forward bandsplit.
reverse/forward bandsplit.
EQ Value
(dB)
Part Number
Typical Insertion Loss (dB)
5 MHz
55 MHz
0
712719
-
-
1
712679
1.7
1.0
2
712680
2.4
1.0
3
712681
3.1
1.0
4
712682
3.8
1.0
5
712683
4.5
1.0
6
712684
5.2
1.0
7
712685
5.9
1.0
8
712686
6.7
1.0
9
712687
7.4
1.0
10
712688
8.1
1.0
11
712689
8.8
1.0
12
712690
9.5
1.0