Quantum Data 881 - Manual (Page 432)

414 Chapter 12 CEC Compliance Testing
CEC Device Bridge- Model TPA-CEC-4R.
Use the table below to determine the correct test device needed for each test.
Load Application
1 Connects CEC line to DDC/CEC ground via a 1 MegOhm +/-5% resistor
2 Connects CEC line to 3.63V via a 27kohm ±5% resistor (multimeter in parallel with the
resistor to measure the voltage drop; alternate (preferred) position for measuring the CEC
line leakage current
3 Connects CEC line to 3.3v via a 27kohm ±5% resistor
4 Connects CEC line to DDC/CEC Ground via 1kO ±5%
5 Connects CEC line to 3.63V via a 27kohm ±5% resistor (multimeter in series with the
resistor to measure the CEC line leakage current)
6 Measures open-circuit voltage across the CEC bus with the Multimeter (debugging only
and does not correspond to any official HDMI CTS test)
Test ID Test Device
7-1: CEC Bus Logic ‘0’ and ‘1’ Voltage Level TPA-CEC-RR
7-2: CEC Maximum Rise Time and Fall Time TPA-CEC-RR
7-15: CEC Line Degradation TPA-CEC-R
8-14: CEC Line Degradation TPA-CEC-R
CEC Device Bridge
Model TPA-CEC-4R
Port 3 Port 1 Port 2 Port 4
Source
Sink
DUT
DUT TE In 1
TE Out 1
TE Out 2
TE Out 2
TE Out 1
TE In 1