I have this screen:
http://www.amazon.com/gp/product/B000Q87LM6/ref=wms_ohs_product?ie=UTF8&psc=1 which I think is a Spectrum series screen.
The Pronto codes, which work for me using UI5 and a USB-UIRT are:
Up
0000 006E 0000 000C 0030 0010 002F 0010 002F 0010 002F 0010 0010 0030 0010 0030 0010 0030 0010 0030 0010 0030 0010 0030 002F 0010 0010 09A7
Stop
0000 006E 0000 000C 0030 0010 002F 0010 002F 0010 002F 0010 0010 0030 0010 0030 0010 0030 0010 0030 0010 0030 0010 0030 0010 0030 002F 0987
Down
0000 006E 0000 000C 0030 0010 002F 0010 002F 0010 002F 0010 0010 0030 0010 0030 0010 0030 0010 0030 0010 0030 002F 0010 0010 0030 0010 09A6
I had no luck searching for these, so I had to learn 'em myself by connecting up my USB-UIRT to my PC. I did not enjoy doing so, so hopefully this post will find its way into some Google results and save someone else the hassle!