HP 3335A - Section II Installation; Introduction and Initial Inspection; Power and Line Voltage Setup

Model 3335A
SECTION
Section H
INSTALLATION
2-1. INTRODUCTION.
2-2. This section contains instructions for installing and
interfacing the Model 3335A Synthesizer/Level Generator.
Included are initial inspection procedures, power and
grounding requirements, line voltage selection, environ-
mental requirements, installation instructions, HP-IB con-
nection procedure and instructions for repackaging for
shipment.
2-3. INITIAL INSPECTION.
2-4. Inspect the shipping container for damage. If the ship-
ping container or cushioning material is damaged, it should
be kept until the contents of the shipment have been
checked for completeness and the instrument has been
checked mechanically and electrically. The contents of the
shipment should be as shown in Figure 1-1. This instrument
was carefully inspected both mechanically and electrically
before shipment. It should be free of mars or scratches and
in perfect electrical order upon receipt. Procedures for
checking electrical performance are given in Section IV. If
the contents are incomplete, if there is mechanical damage
or defect, or if the instrument does not pass the electrical
performance test, notify the nearest Hewlett-Packard Sales
and Service Office. If the shipping container is damaged or
the cushioning material shows signs of stress, notify the
carrier as well as the Hewlett-Packard office. Keep the
shipping materials for the carrier’s inspection. The warranty
statement is located at the front of this manual.
2-5. PREPARATION FOR USE.
2-5(a). Reference Frequency.
2-5(b). A stable frequency reference must be connected to
the 40/N MHz REFerence INPUT located on the rear panel.
If the internal 10 MHz reference is to be used, the BNC-to-
BNC Adapter (see Figure 6-2 Item 25) must be connected
from the 10 MHz REFerence OVEN output, also located
on the rear panel, to the 40/N M/Hz REFerence INPUT.
The BNC-to-BNC Adapter is packed with the accessories.
2-6. Power Requirements.
2-7. The Model 3335A Synthesizer/Level Generator
requires a power source of 100, 120, 220 or 240 V ac,
+ 5%, - 10%, 48 to 66 Hz single phase. Power consumption
is 200 VA maximum.
2-8. Line Voltage Selection.
Before switching on this instrument, be sure it
is set for the line voltage of the power source.
Also ensure the line power cord is connected to
a protective earth contact.
2-9. Line voltage and fuse selection instructions are pro-
vided on the rear panel above the ac line connector. The
line voltage is selected by the position of the two rear panel
line voltage selection switches.
NOTE
The correct fuse rating for the line voltage
selected is located on the rear panel between
the fuse location and line voltage selection
switch.
The line voltage and fuse are factory installed for 120 V
operation.
WARNING o
To maintain operator safety, the following
precautions must be followed before the instru-
ment power cable is connected:
a. Before the power cable is connected to a
power source, the protective earth terminal of
the instrument must be connected to earth
ground. This is accomplished by ensuring that
the instrument’s ac line input connector earth
terminal is correctly connected to the instru-
ment’s chassis and that the power cord ground
conductor has continuity from end to end.
b. Note that the protection provided by
grounding the instrument cabinet will be lost
if a power cable not containing a ground con-
ductor like the type supplied is used to connect
the ac line voltage to the instrument.
c. The power cable plug must be inserted into
a socket outlet provided with a protective earth
contact. The protection of the grounded instru-
ment cabinet must not be negated by the use of
an extension cord without a protective ground
conductor.
d. If this instrument is to be energized via an
auto-transformer to reduce or increase the line
voltage, make sure that the common terminal
is connected to the earthed pole of the power
SOUFCE.
2-10. Power Cable.
2-11. In accordance with international safety standards,
this instrument is equipped with a three-wire power cable.
When connected to an appropriate power line outlet, this
cable grounds the instrument cabinet. The type of power
cable plug shipped with each instrument depends on the
country of destination. Refer to Figure 2-1 for the part
numbers of the power cable plugs available.
Rev. A 2-1