  We show a simple yet effective method that can be used to characterize the
per pixel quantum efficiency and temporal resolution of a single photon event
camera for quantum imaging applications. Utilizing photon pairs generated
through spontaneous parametric down-conversion, the detection efficiency of
each pixel, and the temporal resolution of the system, are extracted through
coincidence measurements. We use this method to evaluate the TPX3CAM, with
appended image intensifier, and measure an average efficiency of 7.4% and a
temporal resolution of 7.3ns. Furthermore, this technique reveals important
error mechanisms that can occur in post-processing. We expect that this
technique, and elements therein, will be useful to characterise other quantum
imaging systems.
