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605 Serial configuration readback failed This test re-sends the last 3
byte serial configuration data to all the serial path (SERDAT, SERBCK,
SERCLK). The data is then clocked back into U103 and compared against
the original 3 bytes sent. A failure occurs if the data do not match.
This tests checks the serial data path through U301, U302, and U305.
This tests does not check the serial path to the system DAC U303.
606 Waveform ASIC failed This test is the first part of test 607 (below).
This test sets up a burst modulation program of a special waveform
(a four period ramp wave) where the data at each waveform address is
the same as the last 12 bits of its address. The burst modulation
waveform is run for 1 cycle plus 1 address and the waveform data is read
back and compared. A correct result infers that the modulation program
ran correctly and halted at the correct address. This checks the ability of
U205 and U206 to correctly run a burst modulation program. This test
and test 604 give a high confidence in the modulation circuitry. This test
will fail if a trigger signal is present on the rear panel Ext Trig BNC input.
607 SYNC signal detection failure, Bessel filter path This test runs the
special waveform described in test 606 and counts transitions of the
SYNC line. The test should provide 8 transitions of the SYNC signal.
The test also checks the 7th Order Bessel filter path and U620 and U604.
An incorrect number of transitions will generate an error. This test will
fail if a trigger signal is present on the rear panel Ext Trig BNC input.
608 SYNC signal detection failure, Elliptical filter path This test runs
a special waveform and counts transitions of the SYNC line. The test
should provide 2 transitions of the SYNC line. The test checks the 9th
Order Elliptical filter path. An incorrect number of transitions will
generate an error. This test will fail if a trigger signal is present on the
rear panel Ext Trig BNC input.
625 I/O processor does not respond This test checks that communications
can be established between
U102 and U903 through the optically isolated
(
U101 and U901) serial data link. Failure to establish communication in
either direction will generate an error. If this condition is detected at
power-on self-test, the function generator will beep and the error
annunciator will be on.
626 I/O processor failed self-test This test causes the earth referenced
processor
U903 to execute an internal, ram test. Failure will generate
an error.
701 Checks that the calibration security disable jumper is removed. If the jumper
is shorted at power on, all non-volatile RAM is reset to initial factory values.
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Chapter 6 Service
Self-Test Procedures
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