Testing Procedures; Basic Counter Unit Testin G Pro Cedu Res; Installation Tests; Performance Tests - IBM 360 Manual

Testing Procedures

This section contains testing procedures for the IBM Basic
Counter Unit and the IBM 1057/1058 Card Punch.

BASIC COUNTER UNIT TESTIN G PRO CEDU RES

Testing procedures for the Basic Counter Unit consist of:

Installation Tests

Performance Tests

Operational Control Patch Panel Test
Lamp Test
Installation Tests
After the Basic Counter Unit has been placed in position
and before it is attached to a unit to be monitored, perform
the following tests to ensure that the unit is functioning
correctly.
Ones Retention Test
1. Activate the following hubs: TEST 2, FORCE CARRY
9-8, 8-7, 7-6, 6-5, 5-4,4-3, 3-2, and 2-1.
2. Press MACHINE RESET.
3. Press START nine times. Visual display should read
99.999.999.900 for all 16 counters.
4. Activate INH ADD and move wire from TEST 2 to
TEST 1.
5. Press START; allow the Basic Counter Unit to run for
30 minutes.
6. Press STOP; check the visual display for a reading of
99.999.999.9xx on all 16 counters. (The value xx is
indeterminate but should be equal for all 16 counters.)
Zeros Retention Test
1. Activate TEST 1 and INH ADD hubs.
2. Press MACHINE RESET and START; allow the Basic
Counter Unit to run for 30 minutes.
3. Stop the Basic Counter Unit; check visual display for
00.000.000.0xx in all counters. (The value xx is
indeterminate but should be equal for all 16 counters.)
High Speed Count 1 Test
1. Activate TEST 1 and FORCE CARRY 6-5 hubs.
2. Press MACHINE RESET.
3. Press START; allow the Basic Counter Unit to run for
30 minutes.
4. Press STOP; note that digits 2 ,3 ,4 , 5, and 6, 7, 8 ,9 are
equal.
5. Check that all 16 counters are equal.
22
IBM Internal Use Only
High Speed Count 2 Test
1. Activate TEST 1 and FORCE CARRY 5A hubs.
2. Press MACHINE RESET.
3. Press START; allow the Basic Counter Unit to run for
15 minutes.
4. Press STOP; note that digits 1 ,2 , 3 ,4 , and 6 ,7 , 8 ,9 $re
equal.
5. Check that all 16 counters are equal.
Performance Tests
Broadside Count to AH Counters
This test checks that all counters run automatically at a rate
of 1 MHz.
1. Connect patch wire from TEST 1 hub on the opera­
tional control maintenance panel to one of the ACVT
BUS hubs.
2. Press POWER ON, MACHINE RESET and START.
3. Allow the Basic Counter Unit to operate for 2 minutes;
then press STOP.
4. Rotate the counter select switch; note that all counters
contain the same value.
5. Press MACHINE RESET.
6. Rotate the counter select switch; note that all counters
equal zero.
Force Carry to All Counters
1. Connect patch wires from FORCE CARRY hubs 7-6
and 4-3 and TEST 1 hub to ACVT BUS hubs.
2. Press MACHINE RESET, then START; allow counters
to run for 2 minutes.
3. Press STOP; check that all counters contain the same
value.
Force Carry to All Counters by Single Stepping
This test is similar to the preceding test except that the
counters are stepped manually each time START is pressed.
Because the change in the displayed counter value may be
easily seen, this test also checks that the digital display
lamps are functioning.
1. Connect patch wires from all eight FORCE CARRY
hubs to ACVT BUS positions.
2. Connect patch wires from TEST 2 hub to an ACVT BUS
hub.
3. Press MACHINE RESET, then START.
4. Rotate the counter select switch; note that all counters
contain the same value.