Scale (SR77) and Connecting Cable (CH33) . … CH33 (cable with unterminated end) Signal Specifications ………. 8. 4. … Spacer assembly with L-type bracket. 2.. Ch33 ssm. 1. Chapter 33 Interference and Diffraction Conceptual Problems 3 The … The critical angular separation is also given by: L d = where d is the…. History: L.…