Keysight U3020AS26, User'S And Service Manual

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Keysight U3020A User’s and Service Guide 29
Service Information
There are many other repair and calibration options available from the Keysight Technologies
support organization. The options cover a range of service agreements with varying response
times. Contact Keysight for additional information on available service agreements for this product.
Electrostatic discharge protection
Electrostatic discharge (ESD) can damage or destroy electronic components. The instrument is
shipped in materials that prevent damage from static, and should only be removed from the
packaging in an anti-static area ensuring that the correct anti-static precautions are taken.
Two types of ESD protection are listed below. Purchase acceptable ESD accessories from your local
supplier.
– Conductive table-mat and wrist-strap combination
– Conductive floor-mat and heal-strap combination
Both types, when used together, provide a significant level of ESD protection. To ensure user
safety, static-safe accessories must provide at least 1 M W of isolation from ground.
Theory of operation
This section provides a general description of the U3020AS26 Test Set, followed by a more detailed
operating theory. The operation of each component group is briefly described to the assembly level
only.
Test set system operation
Figure 9 illustrates the components and interconnects of the Test Set. The main function of this
Test Set is Dual Channel Signal Distribution. The Test Set consists of six main components: a
controller module, a 39495EXT module, distribution board for RF switches, two SP6T RF switches
and a front panel LED indicator. There are no adjustments required for the Keysight U3020AS26
Test Set.
WARNING
These servicing instructions are for use by qualified personnel only. To avoid electrical
shock, do not perform any servicing unless you are qualified to do so.
NOTE
If you need to disassemble the instrument, be sure to work at an antistatic workstation and use a
grounded wrist strap to prevent damage from electrostatic discharge (ESD). See “Electrostatic
discharge protection” on page 29.