ZLNB2002 datasheet(6/12 Pages) ZETEX

6 / 12 page

The following block diagram shows a typical

block diagram twin universal LNB design.

The ZLNB200X devices provides the two

polarity and two tone switches required to

decode the two independent receiver feeds.

The devices are also able detect the absence

of a receiver connected to either port of the

LNB providing an Enable signal allowing the

disabling of the port. This allows the

avoidance of unwanted signal reflections

from an unterminated down feed cable.

Additionally the front end bias requirements

of the LNB are provided by the ZNBG4000 or

ZNBG6000 offering a very efficient and cost

effective solution.

Bias Generator

ZNBG40XX

Series

ZLNB20XX Series

Dual H/V Switch

22kHz Switch

Vertical

Antenna

Horizontal

Antenna

Gain Stage

GaAs/HEMTFET

Gain Stage

GaAs/HEMTFET

IF down feed

950-1750 MHz

- Standard Band

950-2050 MHz

- Enhanced Band

H/V Output 2

H/V Output 1

Control Input

<=13V-Horizontal

>=14.5V-Vertical

Control

High Band

Horizontal

Low Band

Horizontal

High Band

Vertical

Low Band

Vertical

Diode

MUX

DC Input

13-25V

ASTRA

10.95 GHz-11.7 GHz

Standard Band

10.7 GHz-11.8 GHz

Enhanced Band

Mixer

Low Band

High Band

ZLNB2001 ZLNB2002

ZLNB2003 ZLNB2004

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