Alignment; Factory Repair; Removing Generator Covers - Wavetek 188 Instruction Manual

SECTION
W
ALIGNMENT
5.1
FACTORY REPAIR
5.4
ALIGNMENT
Wavetok
maintains a
factory repair
department
tor
those customers not possessing
the
necessary per-
sonnel
or test
equipment
to
maintain
the
instrument
If
an
instrument
is
returned
to
the
factory
for
alignment
or repair,
a detailed description ot the
specific
problem
should be attacned
to
minimize turnaround
time,
5.2
REQUIRED
TEST
EQUIPMENT
Voltmeter Millivolt
dc
measurement
(1
%
accuracy)
Osoiloscopo *60
MHz
bandwidth
Counter
4
MHz
(0
1%
accuracy)
500 Feedthru
s
i
%
accuracy.
2W
Distortion
Anaiyzor
To
400
kHz
RG58UCoax
Cable
3
ft
length
BNC
male contacts
After referring
to
the following preliminary data, per-
form
alignment, as necessary, per
table 5-1
If
per-
forming
partial
alignment,
check
previous
settings
and adjustments
for
applicability
Soo
figures 5-1 and
5-2
for
alignment
control location
1
Ail
measurements
made
at
the
FUNCTION OUT
connector must be
terminated
Into a
500
(
±
i
%)
load
2 Start
the alignment
by connecting
the
unit
to
an
appropriate ac
power source and
setting
the
front
panel switchos as
follows
5.3
REMOVING GENERATOR COVERS
1.
invert the
instrument
and remove
the lou-
se
re
ws
in
the
bottom
cover.
2.
Turn the
Instrument
upright:
remove
the too
cover
for
access
to
generator alignment
con-
trols
3
When
alignment
is
complete, secure
the
bottom
cove' with four screws
NOTE
Remove
me
cover only
when
it
is
neces-
sary
to
make adiostments or
measure-
ments
POWER
Frequency
Dial
FREO MULT
(Hz)
MODECONT
FUNCTION
DC
OFFSET
AMPLITUDE
LIN/LOG
SWEEP SCONT
SWP/STOP
ON
40
X1K
CONT
(released)
a.
OFF
MAX
LIN
(released)
CONT
(released)
STOP
(released)
3
Allow
the
unit
to
warm up
at least
30 minutes
tor
final
alignment Keep the instrument
cover
on
to
maintain heat
Remove
cover
only
to
make
ad-
justments
or
measurements.