12 Tháng

Chuyên dùng khuếch đại tín hiệu cho hệ thống truyền hình cáp, mạng tivi CATV của các tòa nhà, khách sạn, chung cư, hộ gia đình dùng nhiều tivi, tín hiệu khuếch đại ra tới các tivi đẹp, rõ nét, hoạt động ổn định, liên tục. Có thể khuếch đại cho 30 ~ 40 tivi. Thiết bị nhập khẩu chính thức, có đầy đủ giấy chứng nhận C/O, C/Q.

 Summary
WB-8130  Field Bidirectional Amplifiers are mainly used for  bidirectional trunk transmission of CATV television image signal, digital TV signal, telephone voice signals and data (or compressed data) signal.

Performance Characteristic

 One microwave low noise amplification circuits is added in each forward path forestage of WB-8130 high-performance power doubler amplifier modules are used as output ports. Its output level is high and Nonlinear Index is good.
 Import PHILIPS or MOTOROLA low noise push-pull amplification modules are used as forward path of WB-8130 amplifiers. Its output level is high and Nonlinear Index is good.
 PHILIPS or MOTOROLA return amplifier modules are used as backward path. It's distortion is little and SNR is high.
 It is more convenient to debug, because of plug-in duplex filters, plug-in fixed (or continuously adjustable) equalizers, plug-in output splitters and scientific and rational on-line detection ports.
 The equipment can work steadily outdoor under bad environmental condition, because of waterproof aluminium case, high reliability switching power supply and lightning protection system.

 4. Technique Parameter

Item Unit Technique Parameter
                         Forward Path
Frequency Range MHz 47/87 ~862
Rated Gain dB 30
Minimum Full Gain dB ≥30
Rated Input Level dBμV 72
Rated Output Level dBμV 102
Flatness in Band dB ±0.75
Noise Figure dB ≤10
Return Loss dB ≥16
C/CTB dB ≥63
C/CSO dB ≥62
Group Delay ns ≤ 10  (112.25 MHz/116.68 MHz)
Signal to Hum Ratio % < 2
Gain Stability dB -1.0 ~+1.0
                        Return Path
Frequency Range MHz 5 ~30/65
Rated Gain dB 20
Minimum Full Gain dB ≥ 20
Maximum Output Level dBμV ≥ 110
Flatness in Band dB ±0.75
Noise Figure dB ≤ 12
Return Loss dB ≥ 16
Carrier to Second-order Inter-modulation Ratio dB ≥ 52
Group Delay ns ≤ 20  (57MHz/59MHz)
Signal to Hum Ratio % < 2
                                    General Characteristic
Characteristic Impedance Ω 75
Supply Voltage V A:AC(135 ~250)V;B:AC(35 ~ 90)V
Impulse Withstand Voltage(10/700μs) KV > 5
Power Consumption W 20
Dimensions mm 260(L)x210(W)x 120(H)

 Special Notice:
The performance parameters of this manual according to GY/T 184-2002
★Testing Environment:
①There should be 79  ways PAL-D television signals in the frequency of 750MHz(112.25~743.25MHz)and  93  ways PAL-D television signals in the frequency of 862MHz(112.25~855.25MHz)when test the C/CTB and C/CSO.
②There should be 3 frequencies as f1=65MHz、f2=63MHz and f3=57MHz when test the “Maximum Output Level ”of  uplink transmission paths. ③There should be 3 frequencies as f1=10MHz、f2=60MHz and f3 =50MHzwhen test the of “Carrier to Second-order Inter-modulation ratio ”uplink transmission paths in the level of 110 dBμV.
 5. Ordering Guide
Please check: uplink and downlink crossover frequency of bidirectional paths.