Agilent Technologies E6474A Podręcznik Użytkownika Strona 102

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102 Agilent E6474A User’s Guide
6 Get Assistance, if You Need It
Troubleshooting your E6474A system
Device communication problems
Occasionally, when you probe a COM port, the error message in
Figure 49 may be displayed
Figure 49 No device error message
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.
A 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 103.
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