Agilent Technologies 85309B, Руководство пользователя

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2-2 Service Guide 85309-90082
Operating Information LO/IF Distribution Unit
Electrostatic Discharge Protection 85309B
Electrostatic Discharge Protection
Protection against electrostatic discharge (ESD) is essential while removing assemblies from or connecting
cables to the 85309B. Static electricity can build up on your body and can easily damage sensitive internal
circuit elements when discharged. Static discharges too small to be felt can cause permanent damage. To
prevent damage to the instrument:
• always have a grounded, conductive table mat in front of your test equipment.
• always wear a grounded wrist strap, connected to a grounded conductive table mat, having a 1 M
W
resistor in series with it, when handling components and assemblies or when making connections.
• always wear a heel strap when working in an area with a conductive floor. If you are uncertain about the
conductivity of your floor, wear a heel strap.
• always ground yourself before you clean, inspect, or make a connection to a static-sensitive device or
test port. You can, for example, grasp the grounded outer shell of the test port or cable connector briefly.
• always ground the center conductor of a test cable before making a connection to any static-sensitive
device. This can be done as follows:
1. Connect a short (from your calibration kit) to one end of the cable to short the center conductor to the
outer conductor.
2. While wearing a grounded wrist strap, grasp the outer shell of the cable connector.
3. Connect the other end of the cable to the test port and remove the short from the cable.
Figure 2-1 shows a typical ESD protection setup using a grounded mat and wrist strap. Refer to Chapter 6 for
part numbers.
Figure 2-1 ESD Protection Setup