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Checking the Fuse
The type of ac line input fuse depends on the input line voltage. Use the
following fuses:
115 V operation:
230 V operation:
The line fuse is housed in a small container located on the rear-panel
power connector. The container provides space for storing a spare fuse,
as shown in the Figure 9-1 on page 672.
To check the fuse, use the tip of a screwdriver inserted into the
container slot to gently pry the cover off. Verify that replacement fuses
are installed in the correct position as illustrated in the Figure 9-1 on
page 672.
For continued protection against fire hazard, replace line fuse
WARNING
only with same type and rating. The use of other fuses or
materials is prohibited.
Power Cable
The spectrum analyzer is equipped with a three-wire power cable, in
accordance with international safety standards. When connected to an
appropriate power source outlet, this cable grounds the instrument
cabinet.
The spectrum analyzer is a safety Class 1 product. Failure to
WARNING
ground the instrument properly can result in personal injury.
Before turning on the spectrum analyzer, you must connect its
protective earth terminals to the protective conductor of the
main power cable. Insert the main power cable plug only into a
socket outlet that has a protective earth contact.
DO NOT defeat the earth-grounding protection by using an
extension cable, power cable, or autotransformer without a
protective ground conductor. If you are using an
autotransformer, make sure its common terminal is connected
to the protective earth contact of the power source socket.
Various power cables are available for the power outlets unique to
specific geographic areas. The appropriate cable is included with the
instrument when it is shipped to an area requiring one of these cables.
You can order additional ac power cables listed in Figure 9-2 on page
674 for use in different areas. Figure 9-2 also illustrates the plug
configurations and identifies the geographic area in which each cable is
appropriate.
Chapter 9
5 A 125 V UL/CSA (part number 2110-0756)
5 A 250 V IEC (part number 2110-0709)
If You Have a Problem
Power Requirements
673
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