how to check this waveform?????

i using infrared encoder for infrared transmition.but suspect the code is faulthy.below is the waveform get from pin TXIR from MCP2120.TX is the data from microchip in data rate 9600.n TXIR is the encoded data with hardware data rate selection 9600.

i also attached a enlarged waveform to know the pulsewidth of TXIR.waveform shown 1.8us.wat i calculate supposed is 19.5us.is it consider wrong?

more info

i attached my schematic diagram if u guys know wat wrong with my connection pls feel free to inform me...thanks lot

Answer

Try a logic analyzer, it is cheap at www.english.signal.ru

hi...mr.natasha125

i cant log on to the web add tat u told me...thank lot for your help anyway