One of the working RF board , suddenly stopped working ,PLL unlocked and PLL status register is read in 0x508 and found 0xe6.
Please help me to debug further on this.
We debug further and below is the observation.
1.Pin 15 LDO_VCO measured 2.5V
2.REF A clock input is fine , as per Datasheet values.
3.Supply voltage 3.3 V @ VDD's are fine.
4.Ripple measured on 3.3V is 140 mv
5.Read and Write values of SPI register of AD9528 is fine.Below values written.
adi_rfspi_write $n 0x031E 0x00
adi_rfspi_write $n 0x031F 0x00
adi_rfspi_write $n 0x0320 0x13
adi_rfspi_write $n 0x0321 0x00
adi_rfspi_write $n 0x0322 0x00
adi_rfspi_write $n 0x0323 0x13
adi_rfspi_write $n 0x0324 0x40
adi_rfspi_write $n 0x0325 0x00
adi_rfspi_write $n 0x0326 0x01
adi_rfspi_write $n 0x0327 0x00
adi_rfspi_write $n 0x0328 0x00
adi_rfspi_write $n 0x0329 0x04
adi_rfspi_write $n 0x032A 0x00
adi_rfspi_write $n 0x032B 0x00
adi_rfspi_write $n 0x032C 0x00
adi_rfspi_write $n 0x032D 0x00
adi_rfspi_write $n 0x032E 0x00
adi_rfspi_write $n 0x0400 0x00
adi_rfspi_write $n 0x0401 0x02
adi_rfspi_write $n 0x0402 0x00
adi_rfspi_write $n 0x0403 0x90
adi_rfspi_write $n 0x0404 0x04
adi_rfspi_write $n 0x0500 0x10
adi_rfspi_write $n 0x0501 0xF4
adi_rfspi_write $n 0x0502 0x0F
adi_rfspi_write $n 0x0503 0xFF
adi_rfspi_write $n 0x0504 0xFF
adi_rfspi_write $n 0x0505 0x07
adi_rfspi_write $n 0x0506 0x01
adi_rfspi_write $n 0x0507 0x0C
adi_rfspi_write $n 0x000F 0x01
