Example sequence of about 200 successive pulses of PSR J1822−2256 observed using the GMRT at 610 MHz. The subpulses appear earlier with increasing pulse number and are arranged into so-called “drift bands”. There are two distinct drift modes visible: a fast mode seen in the first 60 pulses followed by a slow mode. The two successive drift bands are vertically separated by P₃ periods and horizontally separated by P₂ degrees in phase as indicated for the slow mode. The slow drift mode is followed by a null between pulse number 144 and 176.