The test that path of PF721 microwave horizontal stroke disturbs and eliminate -

Check further, will close only, send high frequency share, add attenuator to join through private cable directly, have a test, if the graph is shown 1 times, discover sink interference still exists; Will close only, send control to pass intermediate frequency cable to join directly partly, undertake intermediate frequency turns receive a test, if the graph is shown 2 times, discovery sends and receive two end picture signal all normal, disturb a phenomenon without generation. Apparent, interference source is in send circuit of high frequency part.

Graph one, graph 2