Quantum Data 980 - Page 21

980 HDMI Protocol Analyzer Application Guide – Source Compliance Test Automation Rev. A1
Page 21 Feb 14, 2013
Test ID
% of full buffer (2GB)
Resulting/Required buffer size
7-36 – High Bitrate Audio
41.492
743MB
7-37 – One Bit Audio
4.48
88MB
7-38 – 3D Video Format Timing
4.322
77MB
7-39 – 4K x 2K Video Format Timing
4.322
77MB
7-40 – Extended Colorimetry Transmission
4.322
77MB
p-scope> pcap mode all // captures all data types (video, data islands)
Pre-Capture Filter set to: No filtering
p-scope> pcap trig vsync 0 // sets the capture trigger to vsync
cap_trig: trigger basic type=0x1 position=0%
p-scope> pcap start // 980 initiates capture
Waiting for the capture trigger event to occur…
Vsync Asserted
INFO: Capture Trigger condition is satisfied
END: pcap_capture_start
Capture complete
Capturing data…
END: Capture complete, capture size 743.53MB [circular], buffer size 743.53MB
Post-Capture Processing (Metadata Phase)
p-scope> pcap timing // generating field timing information.
END: pcap_info info request type=112 complete
p-scope> pcap decode // decode the captured data.
END: decode request complete
Indexing the decode data…
p-scope> pcap index // indexing the decoded data.
Performing the Capture (Raw TMDS)
In the case of the 7-16,17,18,19 Protocol Tests, the 980 has to also look at the protocol data such as the preamble
and guard band. This requires a separate capture of “raw tmds” data. The following series of commands set up the
capture and trigger conditions, etc and then initiate the capture of the raw tmds data.
p-scope> pcap vchk enable // verifying the captured format timing.
pcap_vchk: precapture video check [enabled]
p-scope> pcap size 41.492 // set size of capture buffer to 41.492%.
Capture buffer size 743MB