Filter
Top Products
Self-Test Descriptions
The following self-tests check the major components of the HP 16532A oscilloscope module as well as all
associated circuitry. When the self-tests have all been completed with a "PASS" status, the major data and
control pipelines in the HP 16532A oscilloscope module are functioning properly.
Data Memory Test
This test verifies the correct operation of the FISO (fast-in/slow-out) data memory on each board. Test
patterns are written into the memory and then read and compared with known values.
Timebase Test
The pre-trigger and post-trigger delay modes are first tested by programming a predetermined time
interval in the trigger counters. At the end of the time intervals, the arm, trigger, and run status bits are
read and compared with known values. The coarse and fine interpolators are then checked by reading
the values of the interpolator counters after a simulated acquisition. The counter values are then com-
pared with a known value. Finally, the sample clock is checked by programming a sample clock
frequency and then reading the status of the clock to detect when one clock period has elapsed. The
clock period time interval is then compared with a known value.
A/D Test
This test verifies the correct operation of the A/D convertor on each board. A check of the trigger in
Trigger Immediate mode is first made. The A/D convertors are then exercised by setting the reference
voltage and channel offset such that a simulated acquisition obtains data in the extremes and middle of
the quantization range of the A/D convertor. After each simulated acquisition, the data is compared with
known values.
D/A Test
This test verifies the correct operation of the D/A convertor on each board. Both the offset and trigger
level D/A convertors for each channel are set to a reference level and then changed. The logic trigger IC
is programmed to detect the changes. The detection of a correct trigger indicates that the D/A convertor
is operating normally.
Trigger Test
This test verifies the correct operation of the trigger components on each board. First, the logic trigger
memory is checked by writing and then reading known patterns. The logic qualifiers, logic trigger output,
and trigger holdoff are checked.
IMB Test
This test verifies the correct operation of the oscilloscope card interface to the intermodule bus.
All Tests
This will automatically execute each test, one at a time, until all tests are done.
HP 16532A - Service
6-9