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980 DP 1.4 Video Generator / Analyzer - User Guide
2. Enable HDCP using the Enable radio button. Then hit the Refresh button. View the results and status of the
test through the HDCP Test screen as shown below.
3.13.2 Understanding the HDCP test
The DP HDCP test sequence performed by the 980 DP Video Generator is listed below.
1. Reset the transmitter HDCP engine.
2. Initialize the transmitter.
3. Check Bcaps over the DDC bus to determine if the sink is a receiver or a repeater and generate a new An
value (8 byte random session number) in the transmitter.
4. Transmitter writes An to the receiver using the DDC bus.
5. Transmitter writes Aksv to the receiver using the DDC bus.
6. Read Bksv from the receiver over the DDC bus and validate that it has exactly 20 zeroes and 20 ones in it. You
can query this value with the following command:
7. The display may return a value such as the following which is:
07BE05CEA9
Page 68
Rev. A1
June 16, 2017
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