Wavetek 188 Manual page 21

5.1 FACTORY REPAIR
Wavetek maintains a factory repair department for
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 of the specific
problem should be attached to minimize turnaround
time.
5.2 REQUIRED TEST EQUIPMENT
Voltmeter . Millivolt dc measurement (196 accuracy)
OScIIOSCODONS nee z 60 MHz bandwidth
(SUN рана ae tee Тов 4 MHz (0.1% accuracy)
БОБО АЛИ c E TS + 1% accuracy, 2W
ПОЈЕО От а уде m Ж LETT То 400 КН2
86580 Coax Cable ... 3 ft length BNC male contacts
5.3 REMOVING GENERATOR COVERS
e 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 con-
trols.
3. When alignment is complete, secure the bottom
cover with four screws.
NOTE
Remove the cover only when it is neces-
sary to make adjustments or measure-
ments.
SECTION 5
ALIGNMENT
5.4 ALIGNMENT
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. See figures 5-1 and
5-2 for alignment control location.
1. All measurements made at the FUNCTION OUT
connector must be terminated into а 500 (+ 1%)
load.
2. Start the alignment by connecting the unit to an
appropriate ac power source and setting the
front panel switches as follows.
POWER oscars в um a aa ON
RrequencyDial УСЕЛИ 4.0
EREQ MULKE ТТТ x1K
MODECONTA TT CONT (released)
FUNCTION E Yap A "lo
DO ORFSETS. "pee OFF
AMPLITUDE A tomes ТГ PR MAX
WN OGRE niece мз ш LIN (released)
SWEEBSCON И CONT (released)
SWPISTORS MS и STOP (released)
3. Allow the unit to warm up at least 30 minutes for
final alignment. Keep the instrument cover on to
maintain heat. Remove cover only to make ad-
justments or measurements.
5-1