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Re: Mysterious behavior (ADF4350)

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Hi rbrennan

I changed the setting of register to the recommended settings you have mentioned

But the problem still appeared.

 

I will write down the setting I've used, because the value of the register can not

Describe the setting very clearly:

(Note: these setting used for the output frequency we state in the previous discussion)

This setting is for integer mode and the same for the fractional mode with the needed settings:

R0: INT = 1001 | Frac = 0 | address = 0

R1: MOD = 2 (modified) | Phase = 1 (modified) | Address = 1

R2: Counter reset disable | charge pump three state disabled |

     Power down disabled | positive phase detector | LDP = 10ns |

     LDF_INT (integer mode)| Charge current setting 5mA | Double buffer enabled|

     Reference divider disabled | reference double disabled| muxout digital lock detect

     Reserved | address = 2.

R3: clock divider = 0 | clock divider off | cycle slip reduction disabled

     Address = 3.

R4: output power +5dB| RF output enabled | Aux output power +5dB|

     Aux RF output disabled | Aux output select fundamental | mute till lock disabled|

     vco DC power on | band select clock divider = 20 | RF divider select DBB 4 |

     Fedd back select divided mode | address = 4.

R5:  lock detect pin is digital lock detect | address 5.

 

When i send these information i have lock and both led I am  using in the design are on.


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