In message <[EMAIL PROTECTED]>, Stephen M. Murphy <[EMAIL PROTECTED]> writes >Is it possible to modify the center frequencies in the XTALL software?
Yes. If you look at say Tom's XTALLV2.4p hex file then the 16 locations are in the data section i.e. 1.846 EE C2 AA 29 38 24 1.892 EE C2 BB 28 DC 12 3.546 E7 C2 BA DD 2D DC 3.846 A8 C2 B9 B1 E5 6C 7.046 E3 C2 B6 54 BD D4 7.221 46 C2 A7 3B 4A D7 10.146 44 C2 A9 B0 D1 75 14.046 05 42 B4 10 85 D7 14.271 05 42 BF 26 8C 94 18.114 23 42 C5 F1 7C 39 21.046 22 C2 C3 05 47 3F 21.321 22 C2 CC 42 4C DB 24.936 22 42 BA 15 A8 38 28.046 E0 C2 B2 EE 69 D8 28.092 E0 C2 B4 10 85 D7 28.346 E0 C2 BA 52 6E 57 1.846 EE C2 AA 29 38 24 You can replace any set of 6 with a new frequency. However if you use say the Si57x Programmer software from SiLabs your new frequency will be, from my measurements, 2-3KHz out on the calculated values entered. Tom's got a nice 'fudge' running in the software such that if I measure my Si570 output with his 2.4p code the frequencies are within 10Hz of those specified above. My unknown now is, how do I calculate more accurate hex values? Duncan -- Duncan Clark
