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|  56. If. Step Attenuator AT501
u a t o r subassembly, for coupling through
connector plug P513 to the input of the 42-
This attenuator is identical and inter-
m c if. amplifier subassembly.
changeable with the if. step attenuator pre-
v i o u s l y described for tuning unit 2 (para
57. If. Amplifier, Detailed Analysis
and fig. 30). The output of the 42-mc if.
The 42-mc if. amplifier circuit analysis
is identical with that for tuning unit 3 (para
preamplifier is coupled through connector
plugs P511 and P512, at opposite ends of
coaxial cable assembly W502, to input jack
out only the difference in reference
J1 on if. step attenuator subassembly
symbols between the two if. amplifiers so
AT501. The attenuated if. signal is avail-
that identical functioning parts can easily
able at output jack J2 on the if. step atten-
be located.
80
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