We are conducting a multi-wavelength study of the nearby luminous
 starburst system NGC 3690, using ground-based near infrared and
 now, ISOCAM observations.  The goal of this study is to determine
 the dominate energy mechanism -- starburst or dust-enshrouded AGN -
 - responsible for the luminous infrared light emanating from this
 interacting/merger galaxy.  In favor of the starburst hypothesis,
 we have already discovered an embedded supernova.  This galaxy is
 well studied from the optical to radio, as well as at far-infrared
 wavebands with IRAS, but due to atmospheric restrictions is only
 partially observed in the mid-infrared -- where a large fraction of
 the total luminosity is emitted.  We propose to map NGC 3690 from
 4 to 15 microns using ISOCAM with several LW filters.  These
 broadband observations will reveal embedded starburst clusters and
 associated hot dust, as well as the spatial distribution of the
 PAHs.  Finally, these ISOCAM data will complete Genzel's SWS, LWS,
 and PHOT spectroscopic observations of NGC 3690 giving full
 coverage of this important galaxy in the final ISO database.