Tait TB8100, Руководство по обслуживанию

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TB8100 Service Manual Reciter Circuit Description 67
© Tait Electronics Limited September 2006
Figure 2.17 Identifying the circuitry on the RF board - K and L bands
b external reference input
c mixer and post-mixer buffer
d receiver VCO
e receiver VCO trimmer
f IF tuning elements
g receiver synthesizer
h TCXO
i external reference switch/internal VCXO reference
j
audio buffers
1) exciter VCO 1 trimmer
1! exciter VCO 1
1@ exciter VCO 2 trimmer
1# exciter VCO 2
1$ exciter RF output
1% exciter synthesizer
1^ FCL buffers
1&
power supply
1* FCL
1( IF
2) front end
2!
SAW filter (L band only)
2@ front end first helicals (K band only)
2# SAW filter (L band only)
2$ front end second helicals (K band only)
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 an L-band reciter. The layout of the K-band
reciter circuitry is identical except where noted.
b
c
d
e
f
g
h
1%
1&
1*
1(
2)
2@
2!
2$
i
j
1!
1)
1#
1$
1^
2%
1@
2#