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海事案例

Satellite Communications Functional Specification for A5 LNB

Product Overview

•The A5 free running DRO LNB is designed for TVRO purpose for reception of commercial satellite television.

Features and Benefits

•The A5 LNB has an outdoor and low profile design to be used in a small area on antenna or feed. It is used for Ku band satellite service on 12.2GHz~12.7GHz band.

•The A5 LNB has dual waveguide input port for vertical and horizontal polarized signal. The different polarized signal will be stacked to a single output port to 2 different band of 0.95GHz~1.45GHz and 1.525GHz~2.025GHz.

A5 LNB Functional Details

Parameter	Functions
Supported Satellites or Constellations	The A5 LNB is able to down convert any Ku Band signal from the satellite within the coverage using the 12.2GHz~12.7GHz band range. Usage is on TVRO purpose (commercial television receiving).

1.Physical Characteristics

1.1 A5 LNB Physical Characteristics

Housing Dimensions	160mm x 77mm x 19mm
Unit Weight	0.25Kg
RF Connectors	Female F-Type 75 Ohm
Input	Linear polarized(Horizontal and Vertical)

1.2 Power Specification

Parameter	Specification
Input DC Voltage Range	8V
Power Consumption	250mA max. @8V(Typ.)

1.3 System Performance

Output Connector Impedance	75 Ohm
Image Rejection	40 dB (Min.)
Ku Band Input Frequency Range	12.2GHz ~ 12.7GHz
LO Frequency	LO1 = 10.675GHz LO2 = 11.25GHz
Ku Band Noise Figure	0.9 dB (Typ.)
Ku Band Conversion Gain	50 dB (Min.) 62 dB (Max.)
Ku Band Gain Flatness	± 0.5 dB / 27 MHz
1dB Gain Compression Point	0 dBm (Min.)
Output Spurious	- 60 dBm
Operating Temperature	- 30°C ~ 65°C

2.Environmental Specification Tested

Operating Temperature	25°C ~ +65°C
Non-Operating/Survival Temperature Range	- 35°C ~ +70°C
Humidity	+40°C, 95% Humidity
Vibration	Operational: Random vibration of 1.05g rms in each of three mutually perpendicular axes. The spectrum of the vibration is as follows: 5 to 20 Hz: 0.02g2/Hz 20 to 150 Hz: -3dB/octave. Survival: Random vibration of 1.7g rms for a period of two hours in each of three mutually perpendicular axes (six hours total). The spectrum of the vibration is as follows: 5 to 20 Hz: 0.05g2/Hz 20 to 150 Hz: -3dB/octave
Shock (Survival)	10G, 11ms half sine, 18 shocks total, 6 shocks in each axis, 3 positive and 3 negative.
Salt Fog	With the input and outputs properly sealed, sprayed with a 5% salt solution for 2 hours, maintained at 40 ºC, 95% humidity over 7 days, repeated 4 times

3.A5 LNB

LNB Block Diagram

Description	Frequency
Ku Band Horizontal	12.2GHz~12.7GHz
Ku Band Horizontal	12.2GHz~12.7GHz
Output port	Low Band = 0.95GHz~1.45GHz High Band = 1525GHz~2025GHz