1.  Remove the 2 screws on top of the rear panel power supply cover.   
    DO NOT REMOVE the screws marked "TRANSFORMER MOUNTING ONLY".

2.  Remove the 3 screws on the bottom of the rear panel power supply   
    cover.

3.  Remove the 4 screws (2 each side) at the side of the rear panel    
    power supply cover.

4.  Remove the BNC reatining nuts from the rear panel outputs where    
    fitted.

5.  Slide the rear panel power supply cover away from the casting.

6.  Disconnect the cables from A14J1 and J2 as applicable.

7.  Now remove the rear panel power supply cover completely.

8.  Pop out the blanking plugs in the locations marked "HIGH STABILITY
    TIMEBASE OUTPUT", "FINE ADJ" and "COURSE ADJ."

9.  Locate the BNC/SMA cable from the retrofit kit. Position in the    
    location marked "HIGH STABILITY TIMEBASE OUTPUT" and fit retaining 
    nut and locking washer.

10. Position the time base unit within the power supply cover such     
    that the COURSE and FINE frequency adjustment screws are aligned   
    with the correct rear panel labels. Fix the unit in place using    
    the 4 screws supplied with the kit noting that there are           
    countersunk loactions for the appropriate screws.

11. Now fit the SMA(f) plug at the cable end to the SMA(m) socket on   
    the time base unit and tighten.

12. Bring the rear panel power supply cover into line with the rear    
    panel casting in preparation for refitting.

13. Push home the cable connectors into locations A14J1 and J2. The    
    cable to J1 can sometimes appear tight and may need folded over 
    at the connector end before pushing home.

14. Make sure there is no danger of cables becoming trapped then push  
    the power supply cover fully home.

15. Fix the retaining nuts to the rear panel BNC ports as applicable.

16. Refit all screws in reverse order.

17. Fit the BNC cable, HP p/n 10502A between the "HIGH STABILITY TIME  
    BASE OUTPUT" and the "TIME BASE INPUT".



That completes the installation.