QEI 675 - Page 10

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Use
FREQ
ADJ
control
R2
to fine tune Exciter
to
exact frequency.
Remember
that
a phase locked Exciter
does
not
exhibit
the
drift
of
a frequency lock-
ed
exciter.
Be
sure
that
any
frequency
error
is
in the Exciter
and
not in
the measuring instrument before
you
attempt
to
tune the
Exciter.
Use
signal
levels
in Section 3-2 to get approximate
100%
levels
and
use
an
FCC
Type
Approved
modulation monitor
QEI
Model
671
(with
Model
771
for
stereo)
or
equivalent
for
exact determination
of
modulation.
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