IC10 and IC22 are the EPROMs for a Racal Dana 1992-02M/04E counter with the MATE/CIIL opt 
S/N

Firmware is listed as 8572 04.04

U11 is the calibration EPROM unique to each sig. gen. Other data is:

U10	230917 Rev B	AM27256DC	GPIB board
U22	230867 Rev B	AM27128A-2DC	Main board

The files are saved in Intel HEX format.