diff --git a/src/ctobssim/ctobssim.par b/src/ctobssim/ctobssim.par
index 7d2d123..d12c6a7 100644
--- a/src/ctobssim/ctobssim.par
+++ b/src/ctobssim/ctobssim.par
@@ -17,13 +17,13 @@
 #
 # File information
 #=================
-infile, f, a, "test/data/crab.xml",,, "Model"
+infile, f, a, "$CTOOLS/share/models/crab.xml",,, "Model"
 outfile,f, a, "events.fits",,,        "Output event data file or observation definition file"
 prefix, s, h, "sim_events_",,,        "Prefix for event lists in observation definition file"
 #
 # Observation parameters
 #=======================
-caldb, s, a, "",,,    "Calibration database"
+caldb, s, a, "dummy",,,    "Calibration database"
 irf,   s, a, "cta_dummy_irf",,, "Instrument response function"
 #
 # Simulation parameters
@@ -31,7 +31,7 @@ irf,   s, a, "cta_dummy_irf",,, "Instrument response function"
 seed,   i, h,        1,    ,   , "Random number generator seed"
 ra,     r, a,    83.63,   0,360, "RA of pointing (degrees)"
 dec,    r, a,    22.01, -90, 90, "Dec of pointing (degrees)"
-rad,    r, a,    10.0,    0,180, "Radius of FOV (degrees)"
+rad,    r, a,     5.0,    0,180, "Radius of FOV (degrees)"
 tmin,   r, a,     0.0,    0,   , "Start time (MET in s)"
 tmax,   r, a,  1800.0,    0,   , "End time (MET in s)"
 emin,   r, a,     0.1,    0,   , "Lower energy limit (TeV)"