Checking The Serial (Rs-232), Parallel (1284-C), Or Vga Port; Checking The Gpib Port - Agilent Technologies N5230C Service Manual

Troubleshooting
Rear Panel Troubleshooting

Checking the SERIAL (RS-232), PARALLEL (1284-C), or VGA Port

To verify the proper operation of the SERIAL, PARALLEL, or VGA port:
• Connect a known good serial, parallel, or VGA peripheral device.
• Wait 15 seconds for the analyzer to verify the device connection, and then check the operation of the
peripheral device.
• If the peripheral device performs correctly, the port is functioning properly.
• If the peripheral device does not function properly, the A15 CPU board is faulty. Refer to
Replacing the A15 CPU Board" on page

Checking the GPIB 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. On the menu, point to
System
3. In the block, click
GPIB
configure, and then click
4. On the menu, click
System
5. On the window, point to
Start Menu
open the
Measurement & Automation
6. On the left side of the
a. Click the plus sign to expand the
b. Click the plus sign to expand the
c. Right click
GPIB0 (AT-GPIB/TNT)
7. On the submenu, click
8. The state of all the peripherals found on the bus is returned.
9. If problems are detected, check the connections of all GPIB cables, and check all the GPIB addresses of
the instruments on the bus.
NOTE Address Information
• Each device must have its own unique address.
• The network analyzer's default GPIB address in the controller mode is 21.
• The address set on each device must match the one recognized by the analyzer (and
displayed).
Refer to the manual of the peripheral to read or change its address.
4-18
7-20.
and then click
Configure,
to establish the analyzer as a controller. Wait for the analyzer to
System Controller
.
OK
to open the
Windows Taskbar
Programs, National Instruments NI-488.2,
window.
Measurement & Automation
Measurement & Automation
Devices and Interfaces
to open a submenu.
to run the test.
Scan for Instruments
PNA Series Microwave Network Analyzers
. A
SCPI/GPIB SCPI/GPIB
window.
Start Menu
window under folders:
folder.
folder.
N5230C
"Removing and
dialog box is displayed.
and then click
Explore GPIB
Service Guide N5230-90024
to