Phase detector of the HMC807LP6CE does not work - 2

To Marty Richardson
Hello Marty,
Thank you for your help. Could you help a bit more?
I've attached here the loop filter schematic. Our carrier frequency is 12800 MHz and the REF frequency is 10 MHz. I put the register writting sequence below.
 
On PowerUp I write:

Register 6
0x0D08, 0x450E

Register 3
0x0600, 0x0A00

Register 9
0x13F8, 0x0000

Register B
0x1600, 0x10F4;
 
After reset I write:

Register 0
0x0000, 0x0002;
 
then I write the same that on PowerUp
 
Thanks in advance,
best regards, Dmitry
Parents
  • +1
    •  Analog Employees 
    on May 6, 2019 4:33 PM over 1 year ago

    Hi Dmitry, 

    You really should write all registers at power up to initialize them to a known state. When doing so please follow the proper sequence as shown in the evaluation board register files (the sequence listed above is incorrect).

    • I may be able help if you can confirm the comparison frequency. 
    • I've attached an FAQ which may help in the meantime.

    PDF

    Best regards,

    Marty 

Reply
  • +1
    •  Analog Employees 
    on May 6, 2019 4:33 PM over 1 year ago

    Hi Dmitry, 

    You really should write all registers at power up to initialize them to a known state. When doing so please follow the proper sequence as shown in the evaluation board register files (the sequence listed above is incorrect).

    • I may be able help if you can confirm the comparison frequency. 
    • I've attached an FAQ which may help in the meantime.

    PDF

    Best regards,

    Marty 

Children
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