Section Alignment; Factory Repair; Required Test Equipment; Removing Generator Covers - Wavetek 182A Instruction Manual

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. If an instru­
ment is returned to the factory for alignment or repair,
a detailed description of the specific problem should be
attached to minimize turnaround time.
5.2

REQUIRED TEST EQUIPMENT

VoltmeterMicrovolt dc measurement (1
Oscilloscope. . ... �60 MHz bandwidth
Counter. . .4 MHz (0.1
.......... ±
50Q Feedthru. .
Distortion Analyzer. . . . . . . . . . . .
RG58U Coax Cable: . . 3 ft length BNC male contacts
5.3

REMOVING GENERATOR COVERS

1. Invert the instrument and remove the four screws
in the bottom cover.
2. Turn the instrument upright; remove the top cover
for access to generator alignment controls.
3. When alignment is complete, secure the bottom
cover with four screws.
NOTE
Remove the cover only when it is necessary
to make adjustments or measurements.
Step Check Tester
1 Power Voltmeter
Supply
2
3
4
5 Capacitor
Multiplier
I
Zero
5.4
After referring to the following preliminary data, perform
alignment, as necessary, per table 5-1. If performing par­
tial alignment, check previous settings and adjustments
for applicability. See figure 5-1 for alignment control
location.
The completion of these calibration procedures returns
the instrument to correct calibration. All limits and
tolerances given in these procedures are calibration
guides and should not be interpreted as instrument
%
accuracy)
specifications. Instrument specifications are given in
section 1 of this manual.
%
accuracy)
%
1 accuracy, 2W 1.
. . To 400 kHz
2.
3.
5·1 .
Table Alignment Procedure
Test
Point Control Setting
C4+ Paragraph 5.4, Step 2
C5-
C7+
C6-
SW3-8
Wiper
SECTION
ALIGNMENT
Ali measurements made at the FUNCTION OUT con­
nector must be terminated into a 50Q
Start the alignment by connecting the unit to an
appropriate ac power source and setting the front
panel switches as follows:
POWER . . .
Frequency Dial. . . . . . . . .
FREQ MULT ( Hz) . .
MODE . . . .... .. .
. . .
FUNCTION . . ...... .
DC OFFSET.
AMPLITU DE.
Allow the unit to warm up at least 30 minutes for final
alignment. Keep the instrument cover on to main­
tain heat. Remove cover only to make adjustments
or measurements.
Adjust Result
Verify.
+ 15 ± .75V
± 15V should track
within 30 mV
-15 ± .75V
+5 ± .25V
-5 ±.25V
o
Rgo ±2 mV
I
I
5
ALIGNMENT
(± %)
1 load.
.. ON
. . 4.0
.
. x1K
.. CO NT
.. .
. OFF
. . . .. . .. MAX
Remark
5-1