Table of Contents
Advertisement
Model 492A/494A
SECTION II
INSTALLATION
Section II
Paragraphs 2-1 to 2-13
/
2-1. MECHANICAL INSPECTION.
2-2. Unpack the instrument upon receipt and inspect
it for signs of phy ical damage such as scratched
panel surfaces, broken knobs, etc.
If
there is any
apparent damage, file a claim with the carrier and
refer
to
the warranty page in this manual.
2-3. POWER REQUIREMENTS.
2-4. The Model 492A and Model 494A require a power
source of 115 volts
±
10%, single phase, 50 to 60 cps,
which can deliver approximately 225 watts.
2-5. POWER CABLE.
2-6. For the protection of operating personnel, the
ational
Electrical
Manufacturers'
Association
(NEMA) recommends that the instrument panel and
cabinet be grounded.
This instrument is equipped
with a three-prong conductor power cable which, when
plugged into an appropriate receptacle, grounds the
instrument. The offset pin on the power cable three-
prong connector is the ground pin.
2-7. To preserve the protection fearure when opera-
ting the instrument from a two-contact outlet, use a
three-prong
to
two-prong adapter and connect the
green pigtail on the adapter
to
ground.
2-8. I NST ALLATION.
2-9. The only special precaution necessary for in-
stalling the twt amplifiers is that they should not be
operated close to very large magnetic fields, such as
60-cycle fields, unless externally shielded.
While
the twt amplifiers are shielded within the cabinet,
complete protection against large low-frequency fields
would require more shielding than is practical to in-
clude in the design.
2-10. To operate, connect the instrument to a 115-
volt ac power source, check and adjust rube operating
00144-2
currents as described in preliminary operating pro-
cedure, section 1Il, and connect to the external equip-
ment with coaxial cables terminated in standard UG-
21D/U, type
connectors.
2-11. In section
V,
beginning with paragraph 5-32,
is a list of performance checks for this instrument.
These procedures make a good test as part of incom-
ing quality-control inspection following initial rurn-on.
2-12. REPACKAGING FOR SHIPMENT.
2-13. The following list is a general guide for re-
packaging an instrument for shipment.
If you have
any
questions, contact your authorized Hewlett-
Packard sales representative.
a.
If
possible, use the original container designed
for the instrument,
b. Wrap the instrument in heavy paper or plastic
before placing it in the shipping container.
c. Use plenty of packing material around all sides
of the instrument and protect the panel with card-
board strips.
d. Use heavy cardboard carton or wooden box to
house the instrument and use heavy tape or metal
bands to seal the container.
e. Mark the packing box with "Fragile", "Delicate
Instrument", etc.
Note
If
the instrument is to be shipped to Hewlett-
Packard Company for service or repair, at-
tach to the instrument a tag identifying the
owner and indicating the service or repair to
be accomplished. In any correspondence be
sure to identify the instrument by model
number, serial prefix, and serial number.
2-1
Advertisement
Table of Contents
