It’s an Amateur Radio communications receiver that operates from 50MHz to 905 MHz in the following modes: AM, AM-W, FM-W, FM-N, USB and LSB. That’s precious, isn’t it?
The real concept here is how old it is. Look at some of the options:
FIF- 65A The FIF-232C CAT interface to the Apple II computer
FIF-80A The FIF-80A CAT interface to the NEC PC8001 computer
FIF-232C The FIF-232C CAT interface to the RS-232C port of a PC
That’s some capability for a 37 year old receiver. hihi