Hi, gentlemen

do you have a tools to calculate the all the Register Value for different output frequency? Initially we use the external IO set output frequency, while not flexible

if we would like to set AD9552 output frequency to increases progressively (e.x 161.132813MHz then next 161.132814MHz, then 161.132815MHz), how to quick get the DXCO / OPPLL /SDM regsiter value setting, maybe a tools or method, Could you help on this?

we could access all the register(read and write works). just to want to know how quickly get the reg value.

if we can't get the frequency output increase 1Hz by 1Hz, the following frequency is we need, could you help on PFD/PLL/SDM relate reg value.

161.1328125MHz |

168.040678MHz |

167.3316456MHz |

161.1328125MHz |

168.040678MHz |

167.3316456MHz |

173.4375MHz |

174.099823MHz |

176.0951451MHz |

176.8381626MHz |

179.1343MHz |

179.6875MHz |

187.5MHz |

Jizhong

Hz'z

Dear Jizhong,

The AD9552 evaluation software (ftp://ftp.analog.com/pub/CSS/Software/Installers/AD9551_52/) has many of the presets that you need. For instance, 161.1328125 MHz is 156.25 MHz *33/32.

By clicking on the "Calculate Device Settings" button on the AD9552 Interactive Block Diagram, you'll see many (if not all) of the common presets.

For your list of frequencies, you'll need to either input the frequency directly into the Output 1 Base Freqeuncy, or in the case above, need to enter 156.25 MHz as the base frequency, and 66/64 as the encode ratio.

-Paul Kern