User`s guide

130 Agilent E6474A User’s Guide
6 Get Assistance, if You Need It
Solving Problems with Your System
Device Communication Problems
Occasionally, when you probe a COM port, the error message in
Figure 53 may be displayed
Causes
This message is displayed for the following reasons:
• The Direct Connect Hub or a device connected to a serial port
is not powered on.
• The device has a defective interface cable.
• The serial port has no device connected to it.
• An iDEN phone is communicating at the wrong baud rate.
• The device itself is defective.
Remedies
• Before using the Refresh Port command to probe the COM
port to identify the devices, verify that all devices are
connected and powered on. Devices include the Direct
Connect Hub (if equipped), phones, scanner, receivers, and
navigator. Refer to Chapter 3 for cable connection details.
• If you have an iDEN phone, perform the procedure under
“Setting an iDEN Phone’s Baud Rate" on page 131.
Figure 53 No device error message