Here is a link to Egnator modules with dscriptions. Generally the one channel is similar to the first channel of the two channel modules, if I remember correctly. Maybe someone like rlord can chime in, I know he has Egnater dual channel gear.
http://www.egnater.com/modules.html
Shameless plug, I have a Egnator Gigmods SM4 for sale in the classifieds.