User's Manual

1.3.2.15 Extender Board Block Diagram Theory
Refer to Figure 1-21. The Extender (Logic) CCA provides the means for a service technician to extend an
RMS, Facilities, Monitor/Interrogator, or RTC CCA outside of the Low Power Backplane card cage so that
measurements can be taken.
The Extender (Logic) CCA extends a 96 pin DIN41612, a 60 pin hybrid DIN41612, and four RF signals
through conformable conductors. The Extender (Logic) CCA can only extend the RMS, Facilities,
Monitor/Interrogator, or RTC CCAs.
The 96 pin (P1 and P3) and 60 pin hybrid (P2 and P4) connectors are bussed straight across the CCA. The
RF connectors (P2 and P4: D, E, F, and G) route straight across the CCA via conformable conductors.
Test points TP1 and TP2 allow test equipment connection to circuit ground.
Figure 1-21 Extender Board
1.3.2.16 Low Noise Amplifier (LNA) Theory
Refer to Figure Error! Reference source not found.. The low noise amplifier assembly consists of a
single MMIC amplifier that is performance maximized for the RF band from 1025 to 1150 MHz. In the
system it is located on the preselector filter output and helps to greatly reduce the receiver noise figure by
amplifying the received interrogations before they are split and sent to the receivers. The module uses
5Vdc that is fed from either RTC down the RF coax cables.