through-rate, high gain amplifier with a differential
input.
This has a very good linearity as negative-
biased by
the
voltage detected from
the
current
flowing through
the
Meter load. In switching, this
provides a sufficiently wide frequency band so
that
the
high-frequency
phase
correction
circuit
is
reset.
8. Attenuator Control
A logic control circuit comprised
of
a diode matrix
and
output
buffer. transistors. This encodes a 12-bit
signal
from
the
RANGE slector switch
to
6-bit
signals, which control
the
F:
·
.-st,
Second, and Third
Attenuators.
The
remote
control
connector
is
con-
nected
to
this circuit.
9. RANGE Selector
A
12-contact
rotary switch for selecting a desired
measurable voltage range. This feeds a signal corre-
sponding
to
the
range into
the
Attenuator
Control.
10.
RELATIVE REF Control
A
control
for
setting a reference voltage
in
measuring
a relative value with use
of
the
dB scales
and
the
like.
This
is
capable
of
varying
up
to
10
dB.
11.
Power Supply
6
A power source
of
converting
the
AC
1
OV
input
to
±5V
DC
outputs
to
supply. This has a
sit
icon diode
bt
idge
tot full-wave rectification, high-capacitance
electrolytic capacitors for smoothing, and an
IC
regulator
for
stabilization.
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