That's eight bytes. 1/1/,/ /7/0/0 and a carriage return, or 0x31, 0x31, 0x2C, 0x20, 0x37, 0x30, 0x30, 0x0A which are the hexadecimal values for those ascii characters.
You probably want:
That would be three bytes, 0x0B, 0x02, 0xBC (although I'm not suggesting that that is a valid command for the JRK -- I have no idea). Don't forget that "println" adds a carriage return character at the end of the string as opposed to "print" which does not.