The Motorola device has no NMEA output, but can produce 2.5, 5, 10, 12.5, or 25MHz reference frequencies depending on jumper settings inside the box.
I wish I had a use for them. Right now they're just another piece of the junk piled up in my garage. I use the NTP-syncronized clocks in my computers as my primary time reference because they're on all the time anyway.
Not so useful as a time reference but you could use it as a frequency reference for a microwave station, a beacon or a repeater.
Rob