So an AND gate is what I need to test the low cost version, right ?
If so, should I choose a TTL or CMOS gate ? Any model in particular (I've found this one for instance: CD4081 (CD4081 Datasheet(PDF) - Fairchild Semiconductor)) ?
Do I need something else ? like some kind of (frequency) filter to remove noise from my signal?
Is a shielded cable worth the price in my case ?