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AWR2243: Here's a curious question when I use AWR2243

Part Number: AWR2243


when I use double AWR2243 cascade, 

I did a test,

master TX1 is open,others is closed.

master 1 and 4 RX channel is unnormal. other 6 channels is normal

 

 

slave TX1 is open, others is closed.

slave 5 and 7 RX channel is unnormal. other RX channels is normal.

 

master TX1 and slave TX1 is open, others is closed.

master 1 and 4 RX , slave 5 and 7 RX channel is unnormal. other RX channels is normal. 

 

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I did another test,I just use one awr2243

TX1 is open,others is closed.

1 and 4 RX channel is unnormal. 2 and 3 RX channels is normal

 

 

 

TX2 or TX3 is open

1  RX channel is unnormal. other channels is normal

 

 

 

 I wonder what caused it