What can be received with Echostar and AlphaStar receivers
Not too much really. Both receivers are package receivers and therefore have fixed SR and FEC values. However, if you peruse Lyngesat, you'll most probably find something that matches.
Info about the Echostar Receiver
The Echostar receiver uses SR 20.000 with automatic FEC. Because it was designed to operate in the DBS band (12.2 to 12.7 GHz), it uses a local oscillator frequency of 11.25 GHz in the LNBF. Remember that the Echostar DBS satellites use circular polarity and uses the 14v and 18v technique to switch between right and left hand.
There are a few signals (other than Echostar's own) that will work with Echostar receivers.
One is the Microspace package on GE-1. Hook the receiver up to an LNB pointing at GE-1 Ku and tune to transponder 16. If you're using an LNB with a feedhorn, set for horizontal polarity. If you're using an LNBF, physically rotate the feedhorn by 90 degrees. You'll get a lock and the program guide will show lots of channels. Sad to say, there are all scrambled.
Echostar receivers will also lock onto ExpressVu on Nimiq Ku-Band. This isn't surprising as ExpressVu buys their receivers and LNB's from Echostar - the hardware is identical. Unfortunately, ExpressVu is scrambled, with the exception of the 30 "Galaxie" music channels. Unfortunately, you won't be able to see the music channels on the channel map unless you subscribe (or use an FTA MPEG2 receiver).
The third option is the SkyVista programming package on Telstar 5. The SkyVista programming package is a joint venture by Loral Skynet and Echostar, using EchoStar hardware. SkyVista requires the use of a KU Band LNB rather than the circular polarity FSS LNB's used by ExpressVu and EchoStar.. Like Microspace and ExpressVu, SkyVista is scrambled, with the exception of a few arabic channels.