The EPG of the Apex dt150 is similar to the dt250a in that only a couple hours of programming is displayed. Overall the firmware seems similar to the dt250a, if not exactly the same. I have access to both devices, however I need to put the dt150 back together before I can give you exact details about the firmware.
Apex DT150 tuner: Thomson
My main interest in the DT150 is the RS-232 port. Has anyone accessed this device using their computer, and if so can you provide some details about it? Thanks.