Synchronize NI 6221 and absolute encoder

[Cold]

I need to synchronize my NI USB 6221 with a single turn absolute encoder in serial configuration. The encoder has 2 clocks inputs (+ and -) and I don?t know  which number of line of Digital/IO that I have to use. How can I synchronize the NI acquisition data with encoder? I惴 just a student and I don愒 know very much about this type of equipments ( I don愒 speak English very well too) so all kind of information will be very good for me.Thanks.

Obs.: I?m using MATLAB for make the program?s interface of acquisition.

[Napoleao]

Hi Cold
 I attach three links for you can start your application:
- Quadrature Encoder Measurements: How-To Guide:
<a href="http://zone.ni.com/devzone/cda/tut/p/id/7109" target="_blank">http://zone.ni.com/devzone/cda/tut/p/id/7109</a>
- NI USB-6221 BNC:
<a href="http://sine.ni.com/nips/cds/view/p/lang/en/nid/203867" target="_blank">http://sine.ni.com/nips/cds/view/p/lang/en/nid/203867</a>&nbsp;
- DAQmx (E/M/S-Series Cards) with MATLAB®:
<a href="http://digital.ni.com/public.nsf/allkb/7076035AEA7835FE8625707300520720?OpenDocument" target="_blank">http://digital.ni.com/public.nsf/allkb/7076035AEA7835FE8625707300520720?OpenDocument</a>
If you want, you&nbsp;can&nbsp;make contact in portuguese.