Model 8640B
TM 9-4935-601-14-7&P
WARNING
To avoid the possibility of injury or
death, the following precautions
must be followed before the
instrument is switched on:
a. If this instrument is to be
energized via an autotransformer for
voltage reduction, make sure that the
common terminal is connected to the
earthed pole of the power source.
b. The power cable plug shall only
be inserted into a socket outlet
provided with a protective earth
contact. The protective action must
not be negated by the use of an
extension cord without a protective
conductor (grounding).
c. Before switching on the
instrument, the protective earth
terminal of the instrument must b;
c4nnected to a protective conductor
of the power cord. This is
accomplished by ensuring that the
instrument's internal earth terminal is
correctly connected to the
instrument's chassis and that the
power cord is wired correctly (see
Service Sheet 22).
2-13. Mating Connectors
2-14. Mating connectors used with the Model 8640B
should be either 50 ohm-type BNC male or Type N male
connectors that are compatible with US MIL-C-39012.
2-15. Operating Environment 2-16. The operating
environment should be within the following limitations:
Temperature ..............................................0°C to +55°C
Humidity....................................................<95% relative
Altitude........................................................<15,000 feet
2-17. A forced-air cooling system is used to maintain
the operating temperature required within the
instrument. The air intake and filter are located on the
rear panel, and warm air is exhausted through
perforations in the right-hand side panel. When
operating the instrument, choose a location that
provides at least three inches of clearance at the rear
and two inches clearance at the right side. The
clearances provided by the plastic feet in bench stacking
and the filler strips in rack mounting are adequate for
the top and bottom cabinet surfaces.
2-18. Bench Operation
2-19. The instrument cabinet has plastic feet and a
foldaway tilt stand for convenience in bench operation.
The tilt stand raises the front of the instrument for easier
viewing of the control panel, and the plastic feet are
shaped to make full-width modular instruments self-
aligning when stacked.
2-20. Rack Mounting
2-21. A Rack Mounting Kit is available to install the
instrument in a 19-inch rack. Rack Mounting Kits may
be obtained through your nearest Hewlett-Packard
Office by ordering HP Part Number 5060-8740. This kit
contains all necessary hardware and installation
instructions for mounting the instrument on a rack with
19-inch spacing (see Figure 2-3).
2-22. STORAGE AND SHIPMENT
2-23. Environment
2-24. The instrument should be stored in a clean, dry
environment. The following environmental limitations
apply to both storage and shipment:
Temperature ...........................................-40°C to +75°C
Humidity....................................................<95% relative
Altitude....................................................... <25,000 feet
2-25. Packaging
2-26. Original Packaging.
Containers and materials
identical to those used in factory packaging are
available through Hewlett-Packard offices. If the
instrument is being returned to Hewlett-Packard for
servicing, attach a tag indicating the type of service
required, return address, model number, and full serial
number. Also, mark the container FRAGILE to assure
careful handling. In any correspondence, refer to the
instrument by model number and full serial number.
2-27. Other Packaging.
The following general
instructions should be used for re-packaging with
commercially available materials:
a. Wrap the instrument in heavy paper or plastic. (If
shipping to a Hewlett-Packard office or service center,
attach a tag indicating the type of service required,
return address, model number, and full serial number.)
2-3
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