bi-directional catv amplifier outdoor Bidirectional catv signal amplifier

Field Bidirectional Amplifiers are mainly used for bidirectional trunk transmission of CATV television image signal, digital TV

1. Summary  

SNP8100(K)-00,SNP7100(K)-00 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.

2. Feature

One microwave low noise amplification circuits is added in each forward path forestage of SNP8100K-00,SNP7100K-00 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 SNP8100-00,SNP7100-00 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 aluminum case, high reliability switching power supply and lightning protection system.

3. Block Diagram

4. Technique Parameter

Item	Unit	Technique Parameter
		SNP8124- XX	SNP8128- XX	SNP7124- XX	SNP7128- XX	SNP8127K -XX	SNP8130K -XX	SNP7127K -XX	SNP7130K -XX
Forward Path
Frequency Range	MHz	47/87~ 862		47/87 ~ 750		47/87 ~ 862		47/87 ~ 750
Rated Gain	dB	24	28	24	28	27	30	27	30
Minimum Full Gain	dB	≥24	≥28	≥24	≥28	≥27	≥30	≥27	≥30
Rated Input Level	dBμV	72
Rated Output Level	dBμV	96	100	96	100	99	102	99	102
Flatness in Band	dB	±0.75
Noise Figure	dB	≤10
Return Loss	dB	≥16
C/CTB	dB	≥67	≥63	≥70	≥66	≥67	≥63	≥70	≥66
C/CSO	dB	≥64	≥62	≥66	≥64	≥64	≥62	≥66	≥64
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	12		16		20		24
Minimum Full Gain	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
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 <Specifications and methods of measurement on analog optical fiber amplifiers used in CATV system>.

Testing Environment:

There 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.

There should be 3 frequencies as f1=65MHz,f2=63MHz and f3=57MHz when test the “Maximum Output Level ”of uplink transmission paths. There 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.

bi-directional catv amplifier outdoor Bidirectional catv signal amplifier