Service manual

Self Tests The power-up self test is automatically performed upon applying power to the
logic analyzer. Since the performance tests require test equipment, self tests may
be performed individually to provide a higher level of confidence that the
instrument is operating properly. A message that the instrument has failed the test
will appear if any problem is encountered during the test. The individual self tests
may be performed for functions listed in the self test menu which is invoked via the
I/O menu. The HP 1650B/51B self test is located on the operating system disk and
is required to run the tests.
Power-up Self Test The power-up self test is automatically invoked at power-up of the HP 1650B/51B
Logic Analyzer. The revision number of the operating system firmware is given in
the upper right of the screen during the power-up self test. As each test
completes, either passed or failed is printed in front of the name of the test in the
following manner:
PERFORMING POWER-UP SELF TESTS
passed ROM test
passed RAM test
passed Interrupt test
passed Display test
passed Keyboard test
passed Acquisition test
passed Threshold test
passed Disk test
LOADING SYSTEM FILE
As indicated by the last message, the HP 1650B/51B automatically loads the
operating system disk in the disk drive. If the operating system disk is not in the
disk drive, the message SYSTEM DISC NOT FOUND is displayed at the bottom
of the screen and NO DISK is displayed in front of disk test in place of "passed".
If the above message appears, turn off the instrument, insert the operating system
disk into the disk drive, and again apply power.
Performance Tests HP 1650B/1651B
3-2 Service Manual