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ADV7343 ED/HD TEST PATTERNS can not detect by the monitor

Hi team.

we went to use ADV7343 to generate SD and HD video synchronous. The SD video output is OK, but we get problem in the HD video. So we use HD only mode to do some test.

we use ADV7343 to generate a 1080i/30 video to the monitor. But the monitor can not detect and lock the signal.

So we try to output the ED/HD TEST PATTERNS in the ADV7343 to the monitor. The problem is same.

We sent 74.25MHz to the CLKIN_A,and configure the ADV7343 like the datasheet.

{0x56, 0x00, 0x1c}

{0x56, 0x01, 0x10}

{0x56, 0x30, 0x68}

{0x56, 0x31, 0x05}

we can see the video signal and the sync signal in G channel, but the R and B channel is 1.4V.

we don't know was wrong in here.