Node 24
2nd
LO
perform
step
A12
ad
then
press
m
~~~~~~~~~~
(241@
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
i,,_
. . . . . .
_
__....,._
:.~:.:.:.~
This node counts the 2nd LO used by the sampler/mixer assemblies to produce
the
2nd
IF of 4
kHz.
As you vary the frequency, the counter reading should
change to values very close to those indicated below:
1
F’reqnency
Entered
1
CounterReading
)
Node 25
PL
Ref
(phase
lock reference)
perform
step
A12
ad
then
press
m
~~~~~~~~
125)
Lxl]
.._;
_
~~~~~,~~~~~~~:
LMenu)
~~~~~~~~,.
L
.._............ i
i...
.::::
.:.
.
.
.
.
:.._
s.
This node counts the reference signal used by the phase comparator circuit on
the All phase lock assembly. As you vary the frequency, the counter reading
should change as indicated below:
1042
Service Key Menus and Error Messages
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