7703BPX-DC-RF
2X1 RF Protection Switch
Page 2
Revision 1.0
Figure
1-1 : 7703BPX-DC-RF
1.1.
TYPICAL CONFIGURATION
Uni-directional Bypass Switch
Figure
1-2 : Typical Application of Protection Switch in L-band Downlink Transport System
This diagram illustrates the use of the 7703BPX-DC-RF as a protection switch in an earth station L-
band satellite downlink transport system. The received Horizontal and Vertical polarizations are fed
into LNB (Low Noise Block converter) and down converted to L-band frequency (950 – 2150MHz). The
Evertz Microsystems 7707LTA L-band optical transmitter converts the RF input to an optical signal that
can be transported up to 60km from the antenna site to the Network Operations Centre (NOC). The
7707LR L-band optical receiver converts the optical signal to an RF output which can be directed to an
L-band router for switching and distribution. In this application diagram, the 7703BPX-DC-RF is used to
provide protection against router failure and directs the L-band signal to the appropriate receiver. In
case of power failure to the switch, the latching mechanism keeps the switch in the same state upon
failure.
