Lime6002 tx pll problem

#1

Hello! I’m using your chip lime6002 and get problems with setting tx pll. The reference frequency is 40MHz, the desired 394.65MHz, the registers were set manually first, then with the GUI ‘ctr_6002dr2’. Values of registers:
0X904E
0X91EE
0X9214
0X937A
0X9488
0X95DD
0X968C
0X97E3
0X9840
0X999A
0X9A03
0X9B76
0X9C38
I get a problem: with these settings freqLO = 364.6 MHz, manually changing the registers 0h16-0h19 it is possible to get the closest to the desired frequency of 394.78MHz. BW loop filter 100KHz. The voltage is okay. What could be the problem?
also according to the algorithm from LMS6002 Programming and Calibration Guide page 42, the algorithm selects VCO3, for VCO2 Vtune = 0V. On page 28 it is written that FRANGE and SELVCO register are combinedto FREQSEL register. For my frequency of 394.65MHz FREQSEL = 110111, it conform VCO2. Why is this happening?
Best reguards!

#2

hi nano,
Did you resolved your issue