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Teledyne API T703 Calibrator Operation Manual General Troubleshooting & Repair
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11.1.3. 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 troubleshooting in three ways:
The technici
an 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 11-1 is an example of how to use the Signal I/O menu to view the raw voltage
of an input si
gnal or to con
trol the state of an output voltage or control signal. The specific parameter will vary
depending on the situation.
Figure 11-1: Example of Signal I/O Function
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