Smiles,
A pulse transformer is wired the same as an "ordinary" transformer. However, because the pulse transformer is designed to preserve fast rise and fall times, you must be careful of your layout to minimize shunt capacitances and series inductances. A pulse transformer is designed to have low leakage inductance and low inter-layer winding capacitance. For more information see http://www.rhombus-ind.com/app-note/circuit.pdf http://www.st.com/stonline/books/pdf/docs/3575.pdf
Regards,
Kral
A pulse transformer is driven with a pulse or a pulse train. On the secondary the pulse will be bipolar (even the primary pulse is unipolar) because of the core magnetisation. Thus it require in the secondary a circuit to supress unwanted polarity (usually one or two diodes) and a load near nominal value for which the transformer windings have been calculated.
Lower load means higher spikes. Higher load means lower spikes but also lower pulse amplitude.