Quantum Data 802BT, User Manual

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802BT/802R Video Test Generator User Guide 191
Troubleshooting HDCP errors
Common problems
This table describes possible solutions to problems that may occur during HDCP testing.
Running HDCP test in step mode
The generator normally runs the steps in the HDCP test automatically. If the test fails, the
test is restarted after a few seconds, which makes it difficult to read values at the step
where the test failed. Run any HDCP test in manual mode to pause the test after each
step.
To run the HDCP test in step mode:
1. At any step during an HDCP test, press the Step key.
2. Turn the Image knob to advance to the next step. If you are using an PCI-based
generator, use the commands displayed on the screen to advance to the next step.
3. Press the Step key again to return to automatic mode.
Running an HDCP self-test
An HDCP self-test checks that HDCP authentication is working properly between the
transmitter and receiver on the analyzer. This test can also be used to confirm that a cable
is not interfering with HDCP authentication, and that the DDC clock and DDC data pins,
which the I2C buss uses, are working correctly.
Problem Solution
Test fails at step 3 Transmitter could not read Bksv from the receiver, Bksv was read cor-
rectly but is a wrong value, or an I2C error occurred.
If the EdidData image loads, the I2C communication is working properly.
Verify that the Bksv value is 5 bytes (that is, 40 bits of which 20 zeros
and 20 ones) by reading the value from the test image.
HdcpProd image flashes
repeatedly at step 9 Restart the generator while holding down the Outputs key, or use the
SROP
16 command, which starts the generator in “Reset HDCP Rx by
gating clock” mode.
HdcpProd image is
unavailable The HdcpProd image requires the HDCP production key option to be
installed in the generator. To determine if this option is installed, view
the GenStats image. The HDCP option will be listed under the Options
heading if it is present.