Observations of Pulsars with a Record System Combining a DBBC and a Mark 5B

In November 2009,some observations of the pulsars PSR J0332+5434 and PSR J0835-4510 were carried out by the radio astronomy group of the YNAO(the Yunnan Observatory),with a VLBI backend based on a DBBC(Digital Baseband Conveter)and Mark 5B combination.A RCP(Right Circular Polarization)S-band detection range was selected for the observations. The range has a width of 32 MHz and a starting frequency at 2 206.99 MHz. After the de-dispersing and averaging,single pulses of PSR J0332+5434 and mean profiles of both pulsars were obtained.We derive mean profiles of higher signal-to-noise ratios(S/N)by improving the periods of the pulses.We further analyze the relation between S/N of a mean profile and integration time,which yields the estimation of the stability of the observation system.