ZLNB2012 View Datasheet(PDF) - Zetex => Diodes

Part Name

Description

Manufacturer

ZLNB2012

DUAL TONE AND POLARITY SWITCH LNB MULTIPLEX CONTROLLER

Zetex => Diodes 

ZLNB2012

The following diagram shows a typical block diagram

for a twin universal LNB design. The ZLNB2012 device

provides the two polarity and two tone switches

required to decode the two independent receiver

feeds. The device is also able to detect the absence of a

revceiver connection to either port of the LNB

providing all outputs to go high hence 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

Horizontal Gain Stage

Antenna GaAs/HEMTFET

1

3

ASTRA

10.95 GHz-11.7 GHz

Standard Band

10.7 GHz-11.8 GHz

Enhanced Band

Bias Generator

ZNBG40XX

Series

Control Input

<=13V-Horizontal

High Band >=14.5V-Vertical

+

Mixer

+

Low Band

High Band

Horizontal

Low Band

Horizontal

ZLNB2012 Series

Dual H/V Switch

&

22kHz Switch

Control

PIN

Diode

MUX

DC Input

13-25V

H/V Output 1

IF down feed

950-1750 MHz

- Standard Band

950-2050 MHz

- Enhanced Band

2

4

Vertical Gain Stage

Antenna GaAs/HEMTFET

High Band

+

Mixer

+

Low Band

High Band

Vertical

Low Band

Vertical

H/V Output 2

PROVISIONAL ISSUE A - OCTOBER 2001

5

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