HP 8444A - Page 5

Model 8444A
General Information
SECTION I
GENERAL INFORMATION
1-1. INTRODUCTION
1-2. This manual contains all information required
to install, operate, test, adjust and service the
Hewlett-Packard Model 8444A Tracking Genera-
tor. This section covers instrument identification,
description, options, accessories, specifications and
other basic information.
1-3. Figure 1-1 shows the Hewlett-Packard Model
8444A Tracking Generator with accessories sup-
plied.
1-4. The various sections in this manual provide
information as follows:
SECTION at INSTALLATION, provides infor-
mation relative to incoming inspection, power
requirements, mounting, packing and shipping,
etc.
SECTION HI, OPERATION, provides informa-
tion relative to operating the instrument.
SECTION IV, PERFORMANCE TESTS, pro-
vides information required to ascertain that the
instrument is performing in accordance with
published specifications.
SECTION V, ADJUSTMENTS, provides infor-
mation required to properly adjust and align
the instrument after repairs are made.
SECTION VI, REPLACEABLE PARTS, pro-
vides ordering information for all replaceable
parts and assemblies.
SECTION VI, MANUAL CHANGES, nor-
mally will contain no relevant information in
the original issue of a manual. This section is
reserved to provide back-dated and up-dated
information in manual revisions or reprints.
SECTION VIII, SERVICE, includes all infor-
mation required to service the instrument.
1-5. SAFETY CONSIDERATIONS
1-6. General
1-7. This is an International Electrotechnical Com-
mission Safety Class I instrument. This instrument
has been designed and tested according to IEC Pub-
lication 348, “Safety Requirements for Electronic
’
Measuring Apparatus,’
safe condition.
and has been supplied in
1-8. Operation
1-9. BEFORE APPLYING POWER, make sure the
instrument’s ac input is set for the available ac line
voltage, that the correct fuse is installed, and that
all normal safety precautions have been taken.
1-10. Service
1-11. Although the instrument has been designed
in accordance with international safety standards,
the information, cautions, and warnings in this
manual must be followed to ensure safe operation
and to keep the instrument safe. Service and ad-
justments should be performed only by qualified
service personnel.
1-12. Adjustment or repair of the opened instru-
ment with the ac power connected should be
avoided as much as possible and, when inevitable,
should be performed only by a skilled person who
knows the hazard involved.
1-13. Capacitors inside the instrument may still
be charged even though the instrument has been
disconnected from its source of supply.
1-14. Make sure only fuses of the required current
rating and type (normal blow, time delay, etc.) are
used for replacement. Do not use repaired fuses or
short circuit the fuse holders.
1-15. Whenever it is likely that the protection has
been impaired, make the instrument inoperative
and secure it against any unintended operation.
WARNINGS |
If this instrument is to be energized
through an autotransformer (for voltage
reduction), make sure the common termi-
nal is connected to the earthed pole of
the power source.
BEFORE SWITCHING ON THE IN-
STRUMENT, the protective earth termi-
nals of the instrument must be connected
to the protective conductor of the mains
power cord. The mains plug shall only be
inserted in a socket outlet provided with
1-1