Parameters for SA200 spectra from TMO61

I have measured some parameters for spectra from the SA200 on TMO61 based on the image V0838 Mon 2015-01-28 UT 04:04:37  posted in the database  which might be useful for users of this setup. 

Linear dispersion   -   13.4 A/pixel  (2 point, zero order and H beta)

Calculated spacing of grating from sensor  -   20mm

Theoretical maximum resolution assuming 1.5 arcsec seeing   -  55A  ( based on calculated FWHM of star image)

Actual measured resolution  -  70A  (FWHM H Beta)  

SNR for Vmag 12 in a 100 sec exposure  -  40  at 5500A  (measured for TYC 4822-474-1)

Also attached is the output of the on line calculator for this setup

Robin