Oscilloscope Method
You need not use the oscilloscope method unless the analog bus is
non-functional or any of the signals fail the specifications listed in mble 7-2.
If the analog bus is non-functional or the previous check has revealed
questionable signals, observe the signal(s) with an oscilloscope.
‘Pdble
7-3
identifies a convenient test point and a plot for the five signals listed.
able
7-3.
Al2
Reference Frequencies
Mnemonic
Signal
LOCdi0n
Description
FN1OOkIiZREF
100
kH2
Reference
AlSTPb
RF2 Phase Lock
AllTP9
Reference
REP
Phase Lock
AllTP9
Reference
mm*
Fractional-N
Lo
A14J2
4MHzREF
4
MHZ
Reference Al2TP9
2ND
Lo+/-
Second
Lo
AEPl-2,4
2ND
Lo+/-
Second
M
Al2Pl-2,4
Not an
Al2
signal, but required for
Al2
lowband operation.
see
Analyzer
Fh3=e
htting
Figure
7-8
any
Figure
7-9
216MHzCW
Plgure
7-10
6MHzCW
F?gure
7-11
1oMHzcw
F?gure
7-12
any
F?gure
7-1s
>lSMHzCW
pisure
7-14
14MHzcw
Source Troubleshooting 7-15
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