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5.1
FACTORY
REPAIR
wavetek maintains
a factory
repair department
for
those
customers
not
possessing
the
necessary
personnel
or
test
equipment
to
maintain the instrument.
lf
an instrument
is
returned
to
the factory
for
calibration
or
repair,
a
detailed
description
of
the specific problem
should be attached to
minimize turnaround time.
5,2
REOUIRED TEST EOUIPMENT
Spectrum
Analyzer
600 kHz
to
5
MHz
Voltmeter
Microvolt dc measurement
(0.01% accuracy)
Oscilloscope, Dual
Channel
150
MHz bandwidth
Distortion
Analyzer
To
600
kHz
Counter
To
10
MHz
$.1%
accuracy)
50S)
Load
t}j%
accuracy
5.3
REMOVING GENERATOR COVER
CAUTION
Be aware
that a circuit
board
and short
cable
are attached
to
the top
cover.
Lifting
the top
cover
too far
can damage
the
instrument.
For
main
circuit
board
access,
invert the instrument,
remove
the
four
screws
in the
cover, and
lift
off
the
bottom
cover.
5.4
CALIBRATION
After
referring
to
the following preliminary
data, perform
calibration,
as
necessary,
per table
5
1.
lf
performing partial
SECTION
CALI BRATION
calibration,
check
previous
settings
and
adjustments
for
applicability.
1.
Unless
otherwise noted,
all
measurements made
at
the
50e/
OUT
connector should
be
terminated
into
a
50S-l
(10.1%)
load.
2.
Test
Points
(TPs)
and
adjustments
are
on
the
main
board
unless
noted otherwise,
3.
Before connecting
the unit to
an ac source,
check the
ac line
circuit
to
make sure
the
1151230
and Hl/LO
switches
are
set
at
the correct position
(see
para-
graph
2.21
.
4.
Start the calibration by
setting the
front
panel switches
as
follows:
FREO
Range
X
10K
Frequency
Dial
5
FREO
VERNIER
CAL
SYMM
ETR
Y
NO
RMAL
GEN
MODE
WAVEFORM
AM PLITU
D
E
CONT
i-,
(No
of
fset)
0
AMPLITUDE
VARIABLE
Max cw
SWEEP
MODE
SWEEP
START
SWEEP
TIME
100s
Allow the
unit to
warm
up
at
least
30
minutes
for
final
calibration.
5.
Table
5-1.
Calibration Chart
Cover
the
instrument
and
allow
a
30 minute warm-up.
Keep covered
as
much
as
possible
during calibration.
5-1
Step
Check
Tester
Cal
Points
Control
Settings
Adjust
Desired
R
esu
lts
Remarks
1
Power
Su
pply
R
egu
lato
rs
Vo ltm
eter
C84
(+1
R
206
+15 Vdc
t50
mV
Ground
is
C84
(-).
2
c88
(-)
-15
Vdc 1150 mV
3
CBO
(+1
+5V 1250 mV
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