Troubleshooting
Table 3-8: Digital interface board LED status indicators (cont.)
LED Status Indication
DS4811 STATUS 1 (normally off)
DS911 +1.2 V OK
Diagnostics
This section describes how to use and interpret the embedded diagnostics interface
for both the Power on self tests (POST) and the extended diagnostics tests. These
tests determine whether there has been a module failure in the instrument.
Power on self tests
The instrument runs Power on self tests automatically every time the instrument is
powered up. If a failure is detected during this process, the instrument displays the
Power-On Self Tests tab of the Diagnostics window to list which module(s) failed.
Select the Diagnostics Failure Info tab in the Diagnostics window for more
information about failures.
3–20 RSA5100B Series Service Manual