Figure 2.15 Identifying The Circuitry On The Rf Board - B And C Bands - Tait TB8100 Service Manual

Figure 2.15 Identifying the circuitry on the RF board - B and C bands
b
external reference input
c mixer and post-mixer buffer
d receiver VCO
e receiver VCO trimmer
f IF tuning elements - narrow bandwidth
g IF tuning elements - wide bandwidth
h receiver synthesizer
i IF
j TCXO
1) audio buffers
1! exciter VCO
1@ exciter VCO trimmer
1# exciter synthesizer
1$ exciter RF output
1%
FCL
1^ FCL buffers
1& power supply
1* external reference switch/internal VCXO reference
1( front end second doublet
2) front end second doublet trimmers
2! front end
2@ front end first doublet
2# front end first doublet trimmers
2$ low pass filter
2% receiver RF input
Note:
In order to show as much of the circuitry as possible in the
photograph, the SMD shields have been removed. The
photograph shows a B-band reciter. The layout of the C-band
reciter circuitry is identical.
TB8100 Service Manual
© Tait Electronics Limited September 2006
2%
2$
2#
2@
2!
2)
1(
1*
1&
1^
1%
b
c
d
e
f
g
h
i
j
1)
1!
1@
1#
1$
Reciter Circuit Description 63