Agilent Technologies E8362B, Service Manual

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4-26 Service Guide E8364-90026
Troubleshooting PNA Series Microwave Network Analyzers
Rear Panel Troubleshooting E8362B, E8363B, E8364B
5. The analyzer attempts four cycles of communications with the indicated LAN device.
• It displays the time it took to complete each cycle.
• Each cycle times-out after one second if no communication is established and the
message,
Request timed out
, is displayed.
• It is common for the first of the four cycles to time-out even though subsequent cycles
pass.
• See below for an example output of a successful ping.
C:>ping 141.121.69.162
Pinging 141.121.69.162 with 32 bytes of data:
Reply from 141.121.69.162: bytes=32 time<10ms TTL=127
Reply from 141.121.69.162: bytes=32 time<10ms TTL=127
Reply from 141.121.69.162: bytes=32 time<10ms TTL=127
Reply from 141.121.69.162: bytes=32 time<10ms TTL=127
Ping statistics for 141.121.69.162:
Packets: Sent = 4, Received = 4, lost = 0 <0% loss>.
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms
6. The above message verifies that one way communication from the analyzer to the
network has been established
7. If the subnet mask was changed in step 2, set it back at this time.
How to Ping from the Local Area Network (LAN) to the Analyzer
Reverse communication should also be verified. Determining this, though, is dependent
upon your network setup and software. Generally, you need to issue a ping command using
the IP address of the analyzer to be tested. For example, using Windows 95, 98, 2000 and
while at a DOS prompt, type in
ping xxx.xxx.xxx.xxx
1
. Then press
Enter
on the front
panel or keyboard. If full communication can be established, then the computer display
shows the cycle time for each of four cycle attempts (similar to that in step 5). Other
software may behave somewhat differently, but basically the same.
If the analyzer can talk to the network, but the network can not talk to the analyzer, then
the computer or device used from the network may have a subnet mask that excludes
communication with the IP address chosen for the analyzer. Any subnet mask other than
0.0.0.0
will exclude operation from some addresses. Changing the subnet mask of a
computer or other device should only be attempted by a qualified network administrator.
Failure to communicate due to a subnet mask incompatibility does not indicate any failure
of the analyzer.
If the analyzer fails to ping in either direction, and assuming the subnet masks are set
properly, then the fault must be isolated to the analyzer or to the network. Contact a
qualified network administrator.
1.
The letters x represent the IP address of the analyzer.