Nulling behavior of pulsars in our sample. PSRs J0034−0721 and J2022+5154 show nulling behavior as shown above. The top row shows the integrated profile of a 1-h observation with FR606 across the frequency range 125–150MHz for PSR J0034−0721 (left) and of a half-hour observation with the LOFAR core across the frequency range 149–153 MHz. The intensity-phase plots of these data are shown in the bottom row as a function of the integration number for the PSR J0034−0721 data, which have a 10-s subintegration length, and as a function of the pulse number for the single-pulse data on PSR J2022+5154. The intermittent character of their emission makes the determination of the scintillation timescale complicated, but the scintillation bandwidth can still be determined using standard methods.