China 1GHz Field Bi-Directional CATV Trunk Amplifier

Performance Characteristic
N The forward preceding stage adopts PHILIPS or NEC low noise push pull amplifier modules or GaAs push pull amplifier modules, output stage adopts PHILIPS or NEC Power-Double amplifier modules or GaAs amplifier modules. Output level is high and nonlinear index is good. The backward adopts PHILIPS return dedicated amplifier module. The distortion is low and Signal to Noise Ratio is high.
N It is more convenient to debug, because of plug-in duplex filter, plug-in fixed (or adjustable) equalizer and attenuator, plug-in output splitter and scientific and rational on-line detection ports.
N Built-in optimized high performance AGC control circuit, make the control more accurate and the link signal working more stable.
N The equipment can work steadily outdoor under bad environmental condition, because of waterproof aluminium case, high reliability switching power supply and lightning protection system.

ItemUnitTechnique ParameterDownlink Transmission PathFrequency RangeMHz53/85~862Rated GaindBFP204OUT1: ≥ 36FZ110OUT1: ≥ 40OUT2: ≥ 36OUT2: ≥ 30Minimum Full GaindB≥ 36Rated Input LeveldBμ V72Rated Output LeveldBμ V106/108Flatness in BanddB± 0.75Noise FiguredB≤ 10Return LossdB≥ 16Attenuation RangedB1-18(Fixed insert, 1dB stepping)According to user requirementsEquilibrium RangedB1-15(Fixed insert, 1dB stepping)C/CTBdB≥ 67Test condition:79 channels signal,output level:53MHz/550MHz/750MHz
99dBuV/105dBuV/108 dBuVC/CSOdB≥ 69AGC Pilot Carrier FrequencyMHz168.25(Or up to users)AGC CharacteristicdB± 4(Input)/± 0.5(Output)Group Delayns≤10 (112.25 MHz/116.68 MHz)Signal to Hum Ratio%<2Gain StabilitydB-1.0 ~ +1.0Uplink Transmission PathFrequency RangeMHz5 ~ 42/65Rated GaindB12162024Maximum Output LeveldBμ V≥ 110Flatness in BanddB± 0.75Noise FiguredB≤ 12Return LossdB≥ 16Carrier to Second-order Inter-modulation RatiodB≥52 Test Condition:Output level is 110dBuV,test points:F1=10MHz,F2=60MHz,F3=f2-f1=50MHzGroup Delayns≤20 (57MHz/59MHz)Signal to Hum Ratio%< 2General CharacteristicCharacteristic
ImpedanceΩ75Test InterfacedB-20± 1Supply VoltageVA: AC(135 ~ 250)V; B: AC(35 ~ 90)VImpulse Withstand Voltage(10/700μ s)kV>5Power ConsumptionW25Dimensionsmm247*205*123