How the Verdict of CB144 Test Case Is Defined?

Updated Mar 25, 2020

Reported In

Hardware

  • Micropross Accessories

Other

SW : EMV PICC Analog test suite, MPManager 3

 

HW : MP500 TCL3

Issue Details

We have some FAILs in CB144 test case that would need further explanation.

Would you give us a hint how these test verdicts are generated? 

Would these results considered as PASS in a test scenario?

Solution

For each character in the ATQB, all timing intervals calculated shall be equal to (128 * n) 1/fc +/- 2/fc.

 

Here is one example of the result of a failed test:

Measuring the timing interval of character 12
Character value: 73
Interval 1 = 9.218 µs
Interval 1 = 125.0 1/fc
Interval 1 is not equal to 1 * 128 ± ε


To get a pass, the timing should be between 126 * 1/fc and 130 * 1/fc.

Moreover, if at least one timing is outside of the interval, whole CB144 test case is failed.

Additional Information

From PICC to PCD, bit boundaries within a character shall only occur at nominal positions of rising or falling edges of the subcarrier: (n × 128) ± 2/fC, with n being the considered integer number of bits since the start bit.