Arbiter Systems 1040C - ROM Test; RAM Test; Phase Test; A;D Test

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processor so that it is able to function, at least in a limited way, to perform the following control
tests:
2.8.2.2.1 ROM Test
A check sum test is performed on the control ROM to verify that the control program is intact. All
of the bytes for the control program, present in the ROM, are added to form a sum, which is
compared with a stored value in the ROM. A FAIL message is displayed if a difference is
detected.
2.8.2.2.2 RAM Test
All bytes in the RAM are exercised to verify correct operation. A FAIL message is displayed in
the event a fault is detected.
2.8.2.2.3 Phase Test
The frequency generation and phase control circuitry are checked in this test. The test is restricted
to the signal generation circuits and does not include operation of the AC voltage and alternating
current output amplifiers. A FAIL message at the end of this test would indicate a fault in the
processor phase control or frequency generation circuitry.
2.8.2.2.4 A/D Test
The analog to digital converter test measures the internal precision 100mV reference and verifies
the operation of the sample and hold circuitry. A FAIL message is displayed if these tests are not
correctly performed.
2.8.2.3 CURRENT OUTPUT TEST
The message CURRENT TEST is displayed during the performance of the current output tests. A
FAIL message is displayed if defective operation is detected.
The low current output amplifier and current measurement circuitry are tested first for correct
operation. If a fault is detected, the CURRENT TEST FAIL message is displayed. The high
current output amplifier is tested following successful completion of the low current test. Again, a
FAIL message is displayed if a fault is detected; otherwise, the voltage function tests are
performed. The low and high current tests are performed at 400 Hz in order to exercise extensive
portions of the AC and DC sections of the PMC measurement circuitry.
2.8.2.4 VOLTAGE OUTPUT TEST
The message VOLTAGE TEST is displayed during the performance of the voltage output tests.
The low voltage DC output amplifier and voltage measurement circuitry are tested first for correct
operation. If a fault is detected the VOLTAGE TEST FAIL message is displayed. The high
voltage output amplifier is tested following successful completion of the low voltage test. Two
voltages are tested, 100 V and 1000 V. Again, a FAIL message is displayed if a fault is detected
in either of the tests; otherwise, a PASSED FUNCTION TEST message is briefly displayed
signifying successful completion of the function tests. The PMC is placed in the Reset mode and
DC, 60 Hz or 400 Hz is displayed. This indicates that the PMC is ready for service.