Zlnb2013 – Diodes ZLNB2013 User Manual

Page 5

The following diagram shows a typical block diagram

for a twin universal LNB design. The ZLNB2013 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 ZNBG fixed bias range offering a

very efficient and cost effective solution

ISSUE 1 - AUGUST 2005

ZLNB2013

Bias Generator
ZNBG Series

ZLNB2013

Dual H/ V Switch

22kHz Switch

Vertical
Antenna

Horizontal
Antenna

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

PIN
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