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Teledyne API T703/T703U Calibrator Operation Manual General Troubleshooting & Service
167
8.1.3. USING THE DIAGNOSTIC SIGNAL I/O FUNCTION
The Signal I/O parameters found under the DIAG Menu combined with a thorough
understanding of the instruments Theory of Operation (found in Section 9) are useful for
troubleshooti
ng in three ways:
The technician can view the raw, unprocessed signal level of the calibrator’s critical
inputs and outputs.
Many of the components and functions that are normally under algorithmic control
of the CPU can be manually exercised.
The technician can directly control the signal level Analog and Digital Output
signals.
This allows the technician to observe systematically the effect of directly controlling
these signals on the operation of the calibrator. Figure 8-1 is an example of how to use
the Signal I/O menu to view the raw voltage of an input signal o
r to control the state of
an output voltage or control signal. The specific parameter will vary depending on the
situation.
07223C DCN6572