HP 8340b User Manual

A52 POSITIVE
REGULATOR
The
A52
positive
regulator contains
circuitry
for the:
+20V
supply
+12V
supply
+5.2V
supply
Voltage
accuracy
sensing
circuitry
ON/STANDBY
and
SHUTDOWN
functions
The
+20V
supply
is
a
self-starting
regulator,
with
a
precision
reference
to accurately set
the
output
voltage.
With
the
exception
of the
independent
+22V
standby
supply
(see
the
A35
assembly),
all
supplies
are
dependent
on
the
+20V
output.
NOTE:
The
+20
and
+5.2V
supplies
are
critical,
low noise supplies
with
a
specified periodic and
random
deviation
(PARD)
less
than
100
nV
peak.
The
+12V
supply
is
non-critical,
with
a
specified
PARD
less
than
5
mV
peak.
ASS
NEGATIVE REGULATOR
The
A53
assembly contains
all
circuitry
for
the
—10V,
—5.2V,
and
—40V
power
supplies, as
well
as
voltage
sensing
circuitry to
flag
the
A52
positive
regulator
assembly
if
one
of
these
supplies
goes
out
of
tolerance.
NOTE: The —10
and —40V
supplies
are
critical,
low-noise supplies.
They
are
limited to
a
periodic
and
random
deviation
(PARD)
of
less
than
100
nV
peak.
The
—5.2V
supply
is
primarily a
digital (ECL)
supply,
and
has
a
PARD
specification
of
5mV.
A56
-15V
REGULATOR
The
A56
assembly contains
the —15V
regulator
and voltage
sense
circuitry
to
flag
the
A52
positive
regulator
if
an
out-of-tolerance
condition
occurs
in the
supply.
POWER
SUPPLIES
The
20V
secondary
is
rectified
and
used
by both
the +20
and +22V
regulators.
The +22V
supply
is
used
for
things
that
require
power
when
the
instrument
is
in
standby
(the
10
MHz
standard
oven,
standby
relay,
and
memory
backup).
+20V
is
used
to:
•
Power
the
reference
oscillator
supply.
•
Power
the+12V
supply.
•
Provide
a
reference
voltage for
the
+5.2,
—10,
and
—40V
supplies.
The
—10V
supply
powers
the
—5.2V supply.
The
—40V
supply
powers
the —15V
supply.
1-4
Power
Supplies/Fan
Theory
of
Operation
HP 8340B/41B

HP 8340b Specifications

General

Brand	HP
Model	8340b
Category	Inverter
Language	English