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AD9371 PA not working

Question asked by swaxman on May 18, 2018
Latest reply on May 23, 2018 by swaxman



I generated the AD9371 configuration file ("myk.c") file using TES (connected to board. Other than some AGC settings I see no difference between generating the configuration file generated with TES connected vs. not connected to board).


I have no timing violations and startup sequence looks clean:

Please wait...
RX_XCVR initialization OK
TX_XCVR initialization OK
RX_OS_XCVR initialization OK
MCS successful
CLKPLL locked
AD9371 ARM version 5.1.1
PLLs locked
Calibrations completed successfully
DeframerStatus = 0x61
dac_setup dac core initialized (200 MHz).
adc_setup adc core initialized (100 MHz).


I added the MYKONOS_enableTxNco to first debug RX path. I have 2 TX and 2 RX antennas connected.

RX MGC is at full gain (by default) and TxNco is configured to 0 TX attenuation.

The ILA capture shows very weak sine wave signal as shown below: 


I could not find a register/configuration which results normal transmit level. I am starting to suspect the internal PA is dead and board needs to be substituted.


Help !