Keysight Technologies 85309B LO/IF, User'S And Service Manual

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1
Keysight 85309B
LO/IF Distribution Unit
User’s and Service Guide
2 Operating Information
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 Ω 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.