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Reverse Path Amplifier

Reverse Path Amplifier

The age of high-speed data communications and multimedia application have dawned on cable television. It has brought with it a myriad of services such as high-speed data, video on demand, IP telephony, status monitoring, impulse pay-per-view and internet access to name a few. A cable plant must be two-way ready to carry this high-speed data traffic from a variety of sources.

                                   Item

Unit

Technique Parameter

                  Forward Path

Frequency Range

MHz

52 ~ 862

Rated Gain

dB

28

Minimum Full Gain

dB

≥28

Rated Input Level

dBµv

72

Rated Output Level

dBµv

100 ~ 102

Fitness in Band

dB

1

Noise Figure

dB

≤10

Return Loss

dB

≥14

C/CTB

dB

≥58

C/CSO

dB

≥56

Signal to Hum Ratio

%

<2

Gain Stability

dB

 -1.0 ~ + 1.0

                 Return Path

Frequency Range

MHz

5 ~ 40/52

Rated Gain

dB

12 ~  18

Minimum Full Gain

dB

≥18

Rated Output Level

dBµv

≥110

Fitness in Band

dB

±0.75

Noise Figure

dB

≤12

Return Loss

dB

≥16

Carrier to second order Inter modulation ratio

dB

≥52

Signal to Hum Ratio

%

<2

          General Characteristics

Characteristic Impedance

75

Supply Voltage

V

A: AC (135 ~ 250);

Power Consumption

W

20

 

 

 

  • Return amplifiers are employed to carry the reverse path signals (5 – 42 MHz)(signal as per customer demand)
  • Diplex filters are used to separate the reverse signals from the forward path.
  • A diplex filter is a Low-pass and High-pass combination.
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