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Part Number: DS90CF383B
Test DS90CF383B output signal TXOUT+/-.There are several questions as below:
1.Why is the signal level different?
2.Why does a cycle have only 4bit data?
1. The signal level is not expected to be different as you are observing on your scope. Can you please confirm the frequency of TxCLKIN (input clock)? Please also check your scope and probes to make sure they are rated for the data rate you are using. Please note there will be 7 bits of data for every clock cycle.
2. As noted above, you should observe 7 bits of data for every clock. Please see the figure below that I have pasted from Figure 9 of the DS90CF383B datasheet.
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In reply to Ryan Hashimoto:
The frequency of TxCLKIN (input clock) is 65MHz.
How to investigate the problem?Any Suggestions?
In reply to mike.liu:
Can you provide your e-mail?
1.AM335X drive TxCLKIN.
2.txout_clk&data as below: isonly have 2 bits of data for every cycle.
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