Lathem DDC2 - Manual (Page 5)

As a Count Up Timer ............................................................................................................................ 52
As a Count Down Timer ....................................................................................................................... 52
Appendix E - LTR-GPS Satellite Receiver / Clock Synchronizer ................................................................ 53
Connecting to a Lathem DDC2-RS or DDC4-RS Digital Clock .......................................................... 55
Appendix F - Specifications.......................................................................................................................... 56
Appendix G - Warranty ................................................................................................................................ 57