Sony 7030 or 7040 (newer version) were the top of line DAT machines in the history of that medium. I have both. There is no appreciable difference between the two, except the 7040 had remote capabilities. I don't believe the electronics are different under the skin. These machines were rack mounted beasts that weighed in at about 50 pounds and had a killer transport system. They retailed for $10,000 in the day.
I transcribed (converted) somewhere near 1,000 shows for a radio station five years ago using these machines.
The output is weird, only a single XLR for digital out, no SPDIF or Sony 7 Pin, so I think I had to use a HOSA AES Box to convert that signal to SPDIF, thence into a Tascam DR680.