zlnb2004 Zetex Semiconductors plc., zlnb2004 Datasheet - Page 6

• Manufacturer Part Number: zlnb2004
• Description: Zlnb2004 - Dual Tone And Polarity Switch Lnb Multiplex Controller
• Manufacturer: Zetex Semiconductors plc.

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
ASTRA
10.95 GHz-11.7 GHz
Standard Band
10.7 GHz-11.8 GHz
Enhanced Band
ZLNB2001 ZLNB2002
ZLNB2003 ZLNB2004
Horizontal
Antenna
Vertical
Antenna
Gain Stage
GaAs/HEMTFET
Gain Stage
GaAs/HEMTFET
Bias Generator
ZNBG40XX
Series
2
1
4
3
High Band
High Band
Low Band
Low Band
Mixer
Mixer
+
+
+
+
Control Input
<=13V-Horizontal
>=14.5V-Vertical
86
ZLNB20XX Series
Dual H/V Switch
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.
22kHz Switch
&
High Band
Horizontal
Low Band
Horizontal
High Band
Vertical
Low Band
Vertical
Control
PIN
Diode
MUX
IF down feed
950-1750 MHz
- Standard Band
950-2050 MHz
- Enhanced Band
DC Input
13-25V
H/V Output 1
H/V Output 2