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Installation
Models 8672S/86720A
2-6.
Power Cable
I WARNING f
For protection against fire hazards, the
line fuse should be a 250V normal-blow
fuse with the correct rating.
Before connecting this power, the pro¬
tective earth terminal of each instru¬
ment must be connected to the protec¬
tive conductor of the (Mains) power cord.
The Mains plug shall be inserted only in
socket outlets provided with a protective
earth contact.
The protective action
must not be negated by the use of an
extension cord (power cable) without a
protective conductor (grounding). Ground¬
ing one conductor of a two-conductor
outlet is not sufficient protection.
This instrument is equipped with a three-wire
power cable. When connected to an appropriate ac
power receptacle, this cable grounds the instru¬
ment cabinet.
The type of power cable plug
shipped with each instrument is determined by
the country of destination. Refer to Figure 2-2 for
the part numbers of the power cables and plugs
available.
2-7.
HP-IB Address Selection
The HP-IB listen address is switch selectable. The
switch is located on the rear panel of the FEU as
shown in Figure 3-2. Select the desired address as
shown in Table 2-2. The address is set to decimal
28 at the factory, as shown in Figure 2-3. Refer to
Section II of the HP 8672A Operating and Service
Manual for HP-IB address selection for the Signal
Generator.
2-8,
Interconnection
Interconnection data for the Hewlett-Packard Inter¬
face Bus is provided in Figure 2-4.
2-9.
Mating Connectors
The front-panel .01 TO 18.0 GHz OUTPUT con¬
nector requires a 50-ohm Type N male mating
connector. The PULSE INPUT and 100 MHz REF
INPUT connectors require 50-ohm BNC male
mating connectors. Both types must be compati¬
ble with the specifications of US MIL-C-39012.
Additional cables are listed under ACCESSO¬
RIES SUPPLIED in this section.
2-10. Operating Environment
The operating environment should be within the
following limitations:
Temperature.0°C to 55°C
(15°C to 35°C for specified performance)
Humidity. <95% relative
Altitude.<4570 metres (15 000 feet)
2-11. Bench Operation
The instrument cabinet has plastic feet and fold-
away tilt stands for convenience in bench opera¬
tion. The plastic feet are designed to ensure proper
stacking with other instruments in similar hous¬
ings, and the tilt stands raise the front of the sys¬
tem for easier viewing of the front panel.
2-12. Rack Mounting
| WARNING I
The entire system weighs 39.5 kg
(87 lbs); therefore, care must be
exercised when lifting to a void per¬
sonal injury.
Installation instructions are provided with the
rack mounting kits.
2-13. ACCESSORIES SUPPLIED
The accessories supplied with the FEU consist of
mounting hardware, accessory cables, and han¬
dles as listed in Table 2-2.
2-14. CONNECTING THE FREQUENCY
EXTENSION UNIT TO THE SIGNAL
GENERATOR
The Signal Generator System consists of an HP
8672A Signal Generator (Option 034 or 038), an
HP 86720A FEU, and the accessories listed under
Accessories Supplied. To mechanically mount and
electrically interconnect the two instruments, per¬
form the following steps:
a. Remove the bottom feet from the Signal
Generator.
b. Attach the two Front Vertical Lock Links
MP1,2 to the top of the front frame of the FEU with
the hooks toward the front. Use four Pan Head
screws MP13-16.
c. Place the Signal Generator on top of the FEU
and slide it back to lock the front frames together.
d. If required, remove the bottom rear feet on
the Signal Generator and the top rear feet on the
FEU.
2-2
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