Tait TB9100, Installation And Operation Manual

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128 Appendix B – Inter-Module Connections TB9100 Installation and Operation Manual
© Tait Electronics Limited May 2006
100W Base Station
The connections between modules at the front of a 100W base station are
shown below.
Important
The PMU must be connected to the system control bus at
all times. The terminating circuitry for the bus is located in
the PMU, and if the PMU is disconnected, the state of
much of the bus will be undefined. This may cause
corrupted data to be present on the bus when the reciter
reads the states of the switches on the control panel. This in
turn may result in random actuations of microphone PTT,
carrier, or speaker key, causing the base station to transmit
or the speaker to be actuated incorrectly.
100W base station internal connections
b
28VDC high current output for PA
f
system control bus
c 28VDC low current output for reciter (obscured) g DC output for reciter fan
d RF output to PA h 28VDC high current input cable from PMU
e 28VDC low current input from PMU i RF input from reciter
b c d e
h
f
g
f i
PA reciter PMU