There are 14 profiles for PSR B0740-28

0.408 GHz	gl98
0.422063 GHz	dsb+98
0.61 GHz	gl98
0.659594 GHz	mhq98
0.91 GHz	gl98
10.55 GHz	hx97b
10.55 GHz	sgg+95
1.408 GHz	gl98
1.41 GHz	hx97b
1.42 GHz	sgg+95
1.56 GHz	wmlq93
1.642 GHz	gl98
4.75 GHz	sgg+95
4.85 GHz	hx97b