4-5. DESCRIPTION OF ELECTRICAL TEST PANEL (Cont)
FILTERS FL1-FL3 Remove unwanted electrical signals and noise from prime power input lines (through circuit breaker
CB1). Provide clean ac power to T1 and K1.
TRANSFORMER T1 Uses prime power from filters FL1-FL3 for primary input. Outputs three secondary voltages (7.4
Vac, 8.1 Vac, and 26 Vac) to power supply regulator module 1A3.
RELAY K1 Connects prime ac power from filters FL1-FL3 to signal processor under test. Energized by +28 Vdc from
power supply regulator module.