How to convert a pdf into multiple tifs (each pdf page per tif) with given resolution (say 400 dpi)?

Peng Yu <[email protected]> Wed, 13 Apr 2011 23:58:21 -0500
Newsgroups gmane.comp.video.image-magick.user
Message-ID <[email protected]>
Hi,

I want to convert a pdf into multiple tifs (each pdf page per tif)
with given resolution (say 400 dpi). I've tried a few command line
arguments. But I can't get the correct ones. Could you let me know how
to do this task with convert? Thanks!

-- 
Regards,
Peng