COM Port Test, Questions RTS/CTS and DSR/DTR

[sedrix]

I enabled the RTS/CTS and DSR/DTR test phase and get the following problem, between the DSR and the RTS was a shortcut circuit, but the BiT doesn’t detect it. How does the test work or what’s the problem in this case.

The second question, why does the RI pin not be included in the test, here it is also possible the have some short circuits to other lanes?

[Tim (PassMark)]

Currently the test works like this (at the end of each cycle);
- Clears RTS and check that CTS is low (otherwise error 130)
- Sets RTS and check that CTS is high (otherwise error 131)
- Clears DTR and check that DSR is low (otherwise error 132)
- Sets DTR and check that DSR is high (otherwise error 133)
it doesn't check if each action has affected the other pins.

So yes if there was a short circuit and a signal on one line affected another it's unlikely an error would be generated in BurnInTest in this situation. We'll look into adding an extra check of the pin state for each action to generate such an error in the next version.

When the plugs were first designed there is no standardized/easy way to loop the RI pin on a DB9 plug so it has never been included as part of the the test.