Operating instructions
[~
[:
,-
[::
Jb-1S
FREQUENCY
ERROR
METER
BOARD
0101 (FP-Al)
POWER
SUPPLY
HARMONIC
GENERATOR
BOARD
0100
(CH-AS)
BOARD
0102 (FP-A2)
Figure
5ยท1.
CE-7
Right
Interior
View
Without
Plug-In
5.4.1
Power-Supply
Board,
Voltage
Adjustment
5.4
.2
Crystal-Gsclllator
Adjustment
Preliminary
Instructions:
Preli
rni
nary
Instructions:
Adjustments
for
the
power
supplies
a.
The
crystals
and
trimmer
capaci-
(Table
5-2)
are
on
Power
Supply
tors
for
each
of
the
23
channels
are
Board
0100 (CH-A5)
located
on
the
right
in
the
Cr
ystal
Oven
Assembly
(C H-A4).
side
of
the
instr
ument
,
see
Figure
5-1.
Access
to
the
trimmer
capacitors
is
through
the
bottom
of
the
instrument.
NOTE
See
Figure
5-2.
The
Crystal
Oven
Assembly
cover
has
a
revolving
disc
The
-12-volt
and
+20-volt
regulated
with
one
tuning
hole,
which
can
be
power
suppl
ie
s
are
factory
set
to
rotated
to
line
up
with
the
access
within
0.5
percent
of
rated
output
holes
for
each
of
the
23
crystal
voltage
and
should
not
be
changed
trimmers.
The
tuning
tool
used
to
unless
a
voltmeter
having
an
ac-
adjust
the
trimmer
capacitors
must
curacy
of
at
least
1. 0
percent
is
be an
insulated
female-slotted
tuning
used.
driver.
Refer
to
Table
5-3
for
Cry-
stal
Oscillator
Adjustment
procedures.
Test
Equipment
Required:
a.
Volt-Ohm-Milliammeter,
Simpson
b. A
separate
10-MHz
crystal,
also
Model 270
or
equivalent.
(20,000
located
in
the
Crystal
Oven
Assem-
ohms-per-volt
or
higher
sensitivity,
bly
(see
Figure
5-2),
is
used
when
1. 0
percent
accuracy,
+5V and
the
function
switch
is
in
the
CAL.
/
-50V
ranges.)
CW
position.
Its
trimmer
capacitor
access
hole
is
located
diagonally
above
b. VTVM, H
ewlett-
Packard
Model
crystal
position
21 on
the
Crystal
Oven
400H.
Assembly
cover.
5-2
5601"0015"1
R9
R27
CH-J7
F2 Fl