SNLA419 October   2022 TDP1204 , TMDS1204

 

  1.   Abstract
  2.   Trademarks
  3. 1Introduction
  4. 2Test Setup
  5. 3Test Procedure
    1. 3.1 AEQ Configuration
    2. 3.2 Verify AEQ Configuration
  6. 4AEQ Functional Tests
  7. 5Summary
  8. 6References

4 AEQ Functional Tests

Three tests were conducted using the procedure outlined in this document. These three tests with corresponding results are summarized in Table 4-1.

Table 4-1 AEQ Testing and Results
Test ID Test Conditions Results Summary
Enabled AEQ Test 1 Cable into P1: 10’ HDMI 2.1 Cable
Cable out P2: 6’ HDMI 2.1 Cable
  • AEQ selected the EQ value of 8
  • Display Res. = 7680 x 4320 @ 60Hz
  • Bit Depth = 8 bit
Enabled AEQ Test 2 Cable into P1: 6’ HDMI 2.1 Cable
Cable out P2: 10’ HDMI 2.1 Cable
  • AEQ selected the EQ value of 4
  • Display Res. = 7680 x 4320 @ 60Hz
  • Bit Depth = 8 bit
Disabled AEQ Test Cable into P1: 10’ HDMI 2.1 Cable
Cable out P2: 6’ HDMI 2.1 Cable
  • Manual selection of EQ value of 7 through 10
  • Some screen flickering observed at EQ values 7 and 10
  • EQ values 8 and 9 appeared to produce the same screen quality as seen in AEQ Test 1

The test results show that using the TDMS1204 EVM with longer cables at the P1 port drives the AEQ algorithm to select a higher EQ value. Additionally, with the AEQ disabled, the manual selection shows that signal quality degrades when not selecting the EQ option determined by the AEQ algorithm.