MIL-DTL-38449D
3.5.1.1 Signal pulse sensitivity. The signal pulse sensitivity shall be as shown on Figure 2 for
the classes 3 and 4 units.
FIGURE 2. Sensitivity test schematic and operating characteristics.
3.5.1.2 Coupling. The intercommunication amplifier circuitry shall be alternating-current
coupled to the coil intercommunication circuits to prevent unwanted direct-current bias voltages
from appearing in either circuit.
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