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B) ** BER (BIT ERROR RATE) TEST METHOD: 

1. The device under test (DUT) can be either a Primary or a 
Secondary Station. But during the test, the DUT always 
plays the Secondary role.

2. The DUT will use its native IrDA hardware and native IrDA 
driver stack which implemented the Test Frame in IrLAP as 
specified in the IrDA Protocol Spec. No special test software 
is necessary during the test at the DUT side.

3. The Tester (Test Reference station) is a PC with IrDA 
hardware of controlled IR emission intensity (e.g. ACTiSYS 
IR2000B/L or IR3200M) and a special test software (e.g. ACTiSYS 
ACT-IR9003SW), but not stack testing. The Tester always play the 
Primary role.