Data Sheet

3
Compact Amplifier and Node Accessories
Inverse Equalizers 74190
Inverse equalizers are cable simulators and produce cable equivalent tilt. An inverse equalizer is used in the
AUX socket of the amplifier. The inverse equalizer is normally used during amplifier balancing when an
amplifier is short spaced, in order to achieve a flat input signal into the first amplifier stage. An inverse
equalizer’s “dB value” indicates the length of cable (in dB) that would produce similar tilt (loss differential from
47 MHz to 862 MHz). The values in dB are printed on the top of each inverse equalizer. The inverse equalizer
can be used at all frequencies from 5 MHz to 862 MHz with the loss values given in below table.
Typical Insertion Loss (dB) at Various Frequencies (MHz) Inverse EQ
862 MHz Value (dB)
Part Number
5 47 65 100 340 470 606 862
1.5
A
74190.1003 0.1 0.5 0.7 1.0 2.1 2.5 2.8 3.5
3.0
A
74190.1006 0.1 0.5 0.7 1.0 3.2 4.2 5.0 6.5
4.5
A
74190.1009 0.1 0.8 1.1 1.8 5.0 6.4 7.8 10.1
6.0
A
74190.1012 0.1 0.6 0.9 1.7 6.4 8.3 10.1 13.4
Pads 77140 (Attenuators)
Plug-in pads produce flat (even) loss across the forward and reverse frequency spectrums. Pads are used
during amplifier balancing to adjust amplifier signal levels as needed. The (dB) loss produced is equal to the
pad value printed on the top of the pad. The pads listed below are rated for operation to 1 GHz. Within specific
amplifier types the pads are also used as equalizers and inverse equalizers.
Pads Value (in dB) Part Number
0 A77140.0000
1 A77140.0001
2 A77140.0002
3 A77140.0003
4 A77140.0004
5 A77140.0005
6 A77140.0006
7 A77140.0007
8 A77140.0008
9 A77140.0009
10 A77140.0010
11 A77140.0011
12 A77140.0012
13 A77140.0013
14 A77140.0014
15 A77140.0015
16 A77140.0016
17 A77140.0017
18 A77140.0018
19 A77140.0019
20 dB A77140.0020
75 Ohm Terminator A77140.0075
Attenuators 77150
Plug-in attenuators produce flat (even) loss across the forward and reverse frequency spectrums. Attenuators
are used during amplifier balancing to adjust amplifier signal levels as needed. The (dB) loss produced is
equal to the pad value printed on the top of the pad. The attenuators listed below are rated for operation to
862 MHz.
Attenuator Value (in dB) Part Number
0 A74069.10
2 A77150.1002
4 A77150.1004
6 A77150.1006
8 A77150.1008
10 A77150.1010
12 A77150.1012