1261B User Manual
Using The Enhanced Monitoring System 4-46
Racal Instruments
Ó
1995
of the self-test failure. The meaning of the replies to this
query are discussed later in this section.
C
Turn VXI mainframe power on. After the resource manager
program has executed (MXI/VXI and embedded computer
interfaces), or after a five second delay (GPIB/VXI slot 0
interface), send the following command to the EMS over
the VXIbus:
SYST:ERR?
Read the reply to determine the cause of the self-test failure.
The meaning of the replies to this query are discussed later in
this section.
The “Self Test Failed!” message will continually be displayed
until it is cleared. This message may be cleared using the
following command:
DISP:TEXT:CLEAR
The self-tests may also be initiated with an ASCII command over
either the RS-232 or the VXIbus interface. The command:
*TST?
initiates the self-test. The self-test will complete after
approximately 3 seconds. Upon completion of the self-test, the
result may be read via the VXIbus (the result will automatically
be sent over the RS-232 interface if the command was received
on the RS-232 interface).
The result of the self-test will be one of the following:
0
The self-test has passed
-1 The checksum of the ROM which contains the
firmware does not match the checksum stored in the
ROM itself.
-2 The EEPROM checksum does not match the
checksum stored in the EEPROM itself; the
EEPROM is possibly corrupt.
-3 One of the VXI mainframe sensors routed to the
EMS’s A/D converter has failed. The measured
value on one of the sensors has measured
extremely high, indicating that the sensor is
disconnected. The sensor(s) at fault is indicated in
the reply to the “SYST:ERR?” query.
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