Node 18
IF Det 2N (IF on All phase lock after 3 MHz filter)
Perform step A11 and then press
B
~~~~~:~~~
L18)
(xl)
m
L20)
m
(j-Ref_J
~~~~~~~
.._................... i
<
::.
This node detects the IF within the low pass
IIIter/iimiter.
The
IiIter
is used
during the track and sweep sequences but never in band
l(3.3
to 16 MHz). The
low level (about -1.7
V)
means IF is in the
passband
of the
6Iter.
This node can
be used with the FRAC N TUNE and SRC TUNE service modes.
sg6272d
Figure
19-14.
Analog Bus Node 18
Node 19
IF
Det
2W
(IF
after 16
MHz
IUter)
This node detects IF after the 16 MHz
fiIter/iimiter.
The
6Iter
is used during
pretune and acquire, but not in band 1. Normal state is a flat Iine at about
-1.7 v.
Service Key Menus and Error Messages
1 O-38
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