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One resultant
voltage is
applied to the conductor designated A, and
the other resultant
,
an interval equivalent to
If
-28
later, is applied to con-
ductor
B
.
The voltage A sinusoid is applied to
:
( 1) the RF POWER MONI-
TOR
(tuning
eye)
,
which gives visual indication of whether the level of the
incoming
voltage is within operating limits
,
and (2) to a delayed amplitude
volume
control
amplifier
which
brings the applied voltage to the level re-
quired for
operation of
a
multiar amplitude comparator in the following
stage.
The
voltage
B sinusoid
also
is applied, through a delayed automatic
volume
control amplifier,
to a multiar amplitude comparator.
As the Voltage A sinusoid passes through zero in a negative direction,
the multiar regenerates
and a
pulse appears at its output (Fig. 6).
At a time
corresponding
to
71
-
28 degre
e
s
later, the Voltage B sinusoid passes through
zero
in
a negative
direction and the
multiar in that channel puts out a pulse.
Thus two pulses the
leading edges
of
which are
displaced by a time equiva-
lent to
11
-
ze
are
generated.
The two pulses drive a flip
-
flop.
The
meter
is
connected across the cathodes of two triodes arranged
as a flip
-
flop
circuit.
One pulse
"flips"
the
flip
~
flop
and
the second pulse
"flops
"
it
.
The
potential between the cathodes of
the two
tubes in the flip-
flop is an asymmetrical
square wave the average value of which is propor-
tional
to
8.
The
meter
scales are
so calibrated
that
with a current pro-
portional
to
e
flowing
i
n the
meter
circuit,
an indication will be given
which
i
s
the square root
of tan
e
.
-8
-
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