CIRCUIT ANALYSIS
3.2.5.2 PA Key (Interface Connector pin 2)
This line is used to key and unkey the PA. UNKEY = 0 volt and KEY = 5 volts. The
driver of this line must be capable of supplying 5 volts at 1.0 mA. The appropriate key
sequence requires RF from the transmit synthesizer be input to the PA before the KEY
line is energized.
3.2.5.3 PA PWR Set (Interface Connector pin 3)
This line is used to set the RF Power Output of the PA. Minimum power output equals 4
volts and maximum power output equals 8 volts. The driver of this line must be capable
of supplying 8 volts at 1.0 mA.
3.2.5.4 Fil A+ (Interface Connector pin 6)
This line provides the filtered supply voltage for the Power Control. The driver of this
line must be capable of supplying 13.4 volts ±20% at 100 mA.
LBI-38674L
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