DBTEL Incorporated
DB-6568 Service Manual Level 1 ~ 3
2003.11.13
DBTEL Copyright Reserved
Page 49 of 66
4.10 U61 13MHz CRYSTAL
1. PIN 4 consumed 2.4
±
0.1 V , and is supplied by VCC_REF converted from U87 .
2. The 1.1
±
0.8 V of PIN 1 is generated by AFC of U301 ;the adjusted range is
±
10 ~
±
20
PPM
。
3. The output of PIN 3 is 13 MHz / 0.8 Vp-p signal.
4.11 U301 MCP
Содержание DB-6568
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