2.7.3
Adjustments
Resistor R32 is varied to adjust the VCC1 voltage applied to IC1 (TRF4900).
2.7.4
LED Indicators
-
-
-
VCC LED
If JP4 is installed, the VCC LED is illuminated when voltage is applied to
IC1.
LDET LED
The LDET LED is illuminated when the lock detect line IC1−23 (TRF4900)
is high, indicating that the PLL circuit is locked.
ENABLE LED
The ENABLE LED is illuminated when the STDBY line from the computer
is in the high state.
Connectors and Test Points
Evaluation Board
2-15