RT1 and RT2, and the overtemperature comparator.
It also verifies that no
false overtemperature indication exists.
e. Laser Timing
and Control Test.
This test monitors timing and
control signals for
their presence and adherence to the specifications.
After monitoring the
TOR generator for the reset signal at power turn-on,
the test ensures the
presence of the timing and control signals necessary
for:
System initialization.
Receiver enabling.
High voltage power enabling.
Internal clock.
Flashtube fire control.
Q/switch fire control.
The test procedure also checks the ability of the LD/R to discriminate
between DES, RNG1, and RNG2 operational modes.
f. Malfunction Indicator Test. The malfunction indicator test verifies
the proper operation of the, battery low fault detection circuitry and the
low laser energy fault detection circuitry. The test checks the operation
of the battery low comparator and the energy sense circuitry to ensure
generation of the appropriate alarm signals.
g. High Voltage Test.
These procedures verify the operation of the
three high voltage power supplies.
The test checks the following voltage
signals for proper timing and level:
(1) The 450 V power supply produces the power to operate
the
Q/switch, which allows the laser beam to escape from the laser cavity.
(2) The simmer power supply produces both the TRIGGER VOLTAGE pulse
and the SIMMER VOLTAGE to ionize the gases in the flashlamp.
(3) The PFN power supply outputs the voltage that discharges through
the flashlamp to cause it to flash.
h. Laser Firing Test. This test checks the laser firing operation. It
verifies the laser pulse generation, the laser output energy, the energy
sense circuitry, and the LD/R trigger operation.
i. Designating Test.
The designating test verifies the operation of
the code switches. When you fire the LD/R in the DES mode, laser pulses are
output at a rate determined by the three code switches A1W2S5, A1W2S6, and
A1W2S7. The code
41
OD1722
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