CATV Transmission Equipment--UVINS

- Products - CATV Transmission Equipment - Outdoor Bidirectional Trunk Amplifier

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This is our newly designed field bidirectional AGC with high gain amplifier. It is adopt optimized circuit design and scientific and rational process. High performance AGC control circuit inside is useful for stable gain and low distortion. It's the best choice for large and medium-sized bidirectional CATV transmission network.

* Forward path pre-stage adopts the original low noise GaAs push-pull module to make sure good performance

* Return path adopts original reverse dedicated amplify module to achieve low distortion and high SNR.

* Plug-in duplex filter, fixed equalizer and attenuator and plug-in output splitter which more easy to debug

* With AGC or MGC optional

* With aluminum waterproof housing, high reliability switching power supply and strict lightning protection system

Item	Unit	Technique Parameter
Downlink Transmission Path
Frequency Range	MHz	47/85 ~860/1000
Rated Gain (@FZ110)	dB	30		34		36	38
Minimum Full Gain(@FZ110)	dB	≥30		≥34		≥36	≥38
Rated Input Level	dBμV	72
Rated Output Level	dBμV	106/108
Flatness in Band	dB	±0.75
Noise Figure	dB	≤ 10
Return Loss	dB	≥ 16
Attenuation	dB	1-18 (Fixed insert,1dB stepping, according to user requirements)
Equilibrium	dB	1-15(Fixed insert,1dB stepping, according to user requirements)
C/CTB	dB	≥69			Test condition: 79 channels signal, output level: 53MHz/550MHz/750MHz. 99dBuV/105dBuV/108dBuV
C/CSO	dB	≥67
AGC Pilot Carrier Frequency	MHz	168.25（or up to users）
AGC Characteristic	dB	±4（Input）/±0.5（Output）
Group Delay	ns	≤ 10 (112.25 MHz/116.68 MHz)
Signal to Hum Ratio	%	< 2
Gain Stability	dB	-1.0 ~ +1.0
Uplink Transmission Path
Frequency Range	MHz	5 ~ 42/65
Rated Gain (@FZ110)	dB	12		16		20	24
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	Test Condition: Output level is 110dBuV, test points: F1=10MHz, f2=60MHz, f3=f2-f1=50MHz
Group Delay	ns	≤ 20 (57MHz/59MHz)
Signal to Hum Ratio	%	< 2
General Characteristic
Characteristic Impedance	Ω	75
Test Interface	dB	-20±1
Supply Voltage	V	A：AC（135 ~ 250）V；B：AC（35 ~ 90）V
Impulse Withstand Voltage（10/700μs）	kV	> 5
Power Consumption	W	22
Dimensions	mm	247205123

Solution Reference

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