Texas Instruments LMK04131 Clock Jitter Cleaner with Cascade PLL LMK04131EVAL/NOPB LMK04131EVAL/NOPB 데이터 시트
제품 코드
LMK04131EVAL/NOPB
L M K 0 4 1 X X - R E V 3 E V A L U A T I O N B O A R D O P E R A T I N G I N S T R U C T I O N S
SNLU099
36
Changing from VCXO to Crystal Resonator
If the board has been setup to use the VCXO for PLL1, the VCXO may be disabled and the
crystal enabled as described on the following pages:
Summary
crystal enabled as described on the following pages:
Summary
1. Remove power from VCXO
2. Disconnect VCXO RF path and connect Crystal RF path
3. Connect charge pump output from PLL1 to Crystal Loop Filter (B1) and Crystal
4. Connect charge pump output from PLL2 to Crystal Loop filter (B2)
2. Disconnect VCXO RF path and connect Crystal RF path
3. Connect charge pump output from PLL1 to Crystal Loop Filter (B1) and Crystal
4. Connect charge pump output from PLL2 to Crystal Loop filter (B2)
Procedures
1. Remove power from VCXO
a. Remove 0 ohm resistor in R26 (near the VCXO)
Figure 16