-50.000
-
0.00000
*es
50.000
“se.2
I-*
II
-
,nn
n
-..^>~~,.4*.,
nrr--r
-
0. MO
vo
sg613s
Figure 7-20. LO OUT
Waveform
at
A14J2
4. Vary the voltage at
A14TP14
from + 10 to -5 volts either by:
a. Connecting an appropriate external power supply to
A14TP14,
or
b. First jumping the + 15 V internal power supply from
A8TP8
to
A14TP14
and then jumping the -5.2 V supply from
ASTPlO
to
A14TP14.
5.
Conhrm
that the VCO frequency changes from approximately 30 MHz or less
to 60 MHz or more.
6. If this procedure produces unexpected results, the
Al4
assembly is faulty.
7. If this procedure produces the expected results, continue with the
“Al4
Divide-by-N Circuit Check”.
7-28
Source Troubleshooting
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