Test 48, Keyboard_open, Test 49 test_cycle – Fluke 900 User Manual
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FLUKE 900 SERVICE MANUAL
b6
b5
b4
b3
b2
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bO
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1 9
TEST 48
KEYBOARD_OPEN
This test verifies that all keys are in the open state including the keys on the buffer. The last
two bytes of the individual test result will contain two set bits which may be intetpreted from
the following matrix to identify the key that was depressed.
KEYBOARD MATRIX
byte 3—> b7
2
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b2
b3
b4
b5
b6
b7
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TEST 49
TEST_CYCLE
This test verifies that:
- the following lines are not broken or shorted:
/SYNCEN
/SHORT interrupt line
/RELEN
- the following timers are good:
Test time timer
10 ms system timer
1 ms free rumiing timer
- gate and trigger work properly
3 - 1 4