Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide 127
Troubleshooting
Communication Issues
Communication Issues
There are several different communication ports that the instrument can use
for remote control and communication. They are:
—GPIB
—LAN
—USB
There are also USB ports on both the front and rear of the instrument that can
be used to connect memory devices to. While all of these can be traced back
to the A5 CPU assembly, there may be other contributors to faulty
communication.
GPIB
If problems are being experienced in communicating with the instrument via
GPIB try the following in the order listed to isolate the problem:
1. Try a known good GPIB cable to communicate with the instrument.
2. Verify that the PC attempting to communicate with the instrument can
identify it using the Keysight Connection Expert.
3. Verify that the instrument GPIB address is set to the same address that the
PC trying to communicate with it is using by pressing Utility, I/O Config,
GPIB Setup.
4. Verify that the GPIB connector on the rear panel of the instrument is not
damaged. If damaged, replace the W11 connector assembly.
5. Remove the instrument outer cover and inner bottom cover and inspect
the condition of the inner GPIB ribbon cable and connection to the A3 RF
assembly. If damaged, replace the W11 connector assembly.
6. If the problem persists after the preceding steps have all been taken
replace the A5 CPU assembly.
7. If the problem persists after replacing the A5 CPU assembly replace the A3
RF assembly.
LAN
The instrument supports 100 MHz LAN communication through the rear panel
ethernet connection. If problems are being experienced in communicating with
the instrument via the ethernet connection try the following in the order listed
to isolate the problem:
1. Try using a known good CAT5 cable to communicate with the instrument.
2. With a known good active CAT5 cable connected to the instrument
ethernet connection the two LEDs on the connector should be active, one
solid and one blinking. If not, replace the A5 CPU assembly.
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