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7.5.2 Power & I/O Connector
7.5.2
Power & I/O Connector
25-pin "D" Male Mounted on the rear panel
7.5.3
Test Connector
9-pin "D" Female mounted on the front panel
A
Engineer ing Diagr ams
Most Eclipse transmitter modules contain two PCBs, a motherboard with the control
and signal generation circuitry (the exciter board), and an RF Power Amplifier board.
Certain models are equipped with optional functions on piggyback PCBs atop the
exciter motherboard. The exciter PCB typically has a few components whose values
vary from model to model depending upon operating frequency and local regulatory
constraints. The RF PA PCB varies from model to model but to a greater extent. At
least two different PCB layouts, and numerous variations, exist. This manual presents
the circuits and parts lists for two representative variants. When ordering spare parts be
sure to specify the model exactly, in case the part you require is different in value from
that specified in this manual.
Older models (predating this manual) may not be covered by this manual. However,
advances are evolutionary, and the information in this manual will be sufficient in most
cases to permit understanding and servicing of all models, past and present.
Versions of more detailed circuit schematics, printed on A3 paper, may be inserted or
bound with this manual towards the end. It is sometimes easier to work with these fold-
out diagrams because of their larger format. In case the inserts/fold-outs are missing or
damaged, the reader is advised that information in the figures included with the text
should be identical.
A.1
Block Diagr am
Figure 1 shows the block signal flow diagram.
A.2
Cir cuit Diagr ams
Figure 2 shows the detailed circuit diagram with component numbers and values for the
main (exciter) PCB. Figure 3 shows the detailed circuit diagram with component
numbers and values for the higher-power PA variation. Figure 4 shows the detailed
circuit diagram with component numbers and values for the lower-power PA variation.
Page 28
A ENGINEERING DIAGRAMS
RF Technology T220
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