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TDC1000-GASEVM: a problem about headware on TDC1000-GASEVM

Ming Zhao
Prodigy 10 points

Part Number: TDC1000-GASEVM

Hello,

When I test the TDC1000-GASEVM to set the green board to HV, the 5 pin of U2 and U3 on the green board has signal, but the single floweg throgh the resistance R12 and R22 is diapperred. Why?In addition, RX will also output a 3~5V signal  similar to pulse  , is that normal?