Service Guide N5227-90001 4-17
PNA Series Microwave Network Analyzers Troubleshooting
N5227A Rear Panel Troubleshooting
Rear Panel Troubleshooting
Each rear panel connector is associated with a hardware group in the analyzer. You can use the data at these
rear panel connectors to help troubleshoot these hardware groups in addition to testing the connectors.
The connectors discussed in this section are:
•USB x 4
•Monitor (VGA)
• GPIB (0) CONTROLLER
• GPIB (1) TALKER/LISTENER
•LAN
Checking the USB Ports
To verify proper operation of any rear panel USB port:
• Connect a known good USB device, such as a USB mouse.
• Wait 15 seconds for the analyzer to verify the device connection, and then check the operation of the
USB device.
• If the device performs correctly, the USB port is functioning properly.
• If the device does not perform correctly, remove the non-working USB device, wait 15 seconds, and then
reconnect the device to the rear panel USB port.
• If the USB device still does not work and has been verified to work elsewhere, then the A21 CPU board is
faulty. Refer to “Removing and Replacing the A21 CPU Board Assembly” on page 7-18.
Checking the CONTROLLER Port
The network analyzer uses a National Instruments 488.2 GPIB controller and associated driver software.
This software includes a test utility that scans the GPIB bus and returns the status of all the connected
peripherals.
To run the test utility software and check the GPIB status:
1. Connect a known good peripheral to the analyzer using a known good GPIB cable.
2. Press UTILITY , then , then . A
SICL/GPIB/SCPI dialog box is
displayed.
3. In the
GPIB block, click System Controller to establish the analyzer as a controller. Wait for the analyzer to
configure, and then click
OK.
4. If the Window Desktop is not displayed, press UTILITY , then , then
to view the
Windows Taskbar menu at the bottom of the display.
5. On the
Windows Taskbar menu, click Start then point to Programs, National Instruments NI-488.2, and then
click
Explore GPIB to open the Measurement & Automation window.
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