Keysight Technologies E4981A, Service Manual

Page: 57 / 152

Chapter 4 55
Troubleshooting
Function Specific Troubleshooting
4. T
roub
lesho
o
ting
Function Specific Troubleshooting
If the E4981A exhibits a failure symptom that is related to a specific function or control
such as a front panel key control, display, data storage, remote control interface, external
trigger, isolate the trouble using the Function Specific Troubleshooting procedures
described below. The major functions of the E4981A and the troubleshooting procedure for
each function are shown in
Table 4-4 .
Table 4-4 Major functions and troubleshooting procedures
Function Description Troubleshooting
Front panel keys All the E4981A functions can be set and controlled
via the front panel keys. Refer to “To Check the Front
Panel” on page 56 .
LCD Almost all the information including the
measurement value, setup state, result data
processing, menu bar, softkey label and others are
indicated on the LCD. Refer to “To Check the
LCD” on page 56 .
Front USB port The USB port is used to save data in a USB
memory. Refer to “To Check the Front
USB port” on page 56 .
External trigger input The external trigger input terminal (BNC) on the
rear panel allows an external trigger source to be
used for measurement trigger. Refer to “To Check the
External Trigger Input” on
page 57
.
LAN port The LAN interface port on the rear panel allows
the E4981A to be connected to 10/100 Base-T
Ethernet. Refer to “To Check the
LAN” on page 57 .
GPIB Interface The GPIB compatibility allows the E4981A to be
operated as a talker/listener on IEEE 488 interface
bus. Refer to “To Check the
GPIB” on page 59 .
USB (USBTMC)
Interface Through this port, you can control the E4981A via
external controllers. It is equivalent to control via
GPIB. Refer to in “To Check the
USB (USBTMC) Interface”
on page 60
.
Handler interface The interface is for data exchange with an
automatic machine (handler) used on production
line. Refer to in “To Check the
Handler Interface Function”
on page 60
.
Scanner interface The interface to connect a scanner to perform up to
128 sets of multi-channel correction and
measurements. Refer to in “To Check the
Scanner Interface Function”
on page 64
.