Self-Tests Descriptions; Clock Source Test - Agilent Technologies 16522A User Manual

Self-Tests Descriptions

The following section contains a description of each of the the Agilent
16522A self tests. In a multi-card master/expander module, the tests
are performed on all cards unless otherwise indicated.

Clock Source Test

The Clock Source Test checks that the internal clock sources are functioning
by verifying the presence of a given clock source. The test toggles each clock
source in the following fashion. First the board is stopped and outputs are
disabled. Module RAM is loaded with zeros, then the module is placed in the
respective mode for the given clock and the clock source is selected. The
module is then started and the main status checked to see that the pipeline is
running. The board will then be stopped and the status checked to see that
the pipeline did stop.
Passing the Clock Source Test implies that the module internal clock sources
are functioning properly, and that the other dependent subcircuits of the
module respond to the clock signal.
DIAGNOSTIC INTEGER VALUE:
This test is only valid for signals on the master board of the configuration.
The values returned from the expanders will be zero. The integer returned
will have the following bit format:
BIT #: 15, 14,13, 12 11, 10, 9, 8
200M clk 100M clk
Each nibble of the output corresponds to one of the clock sources. The bit
pattern of each nibble has the following definition:
0 — passed
1 — failed to run
2 — failed to stop
3 — failed to both run and stop
4–14
7, 6, 5, 4 3, 2, 1, 0
50M clk PLD clk