1176 THE BELL SYSTEM TECHNICAL JOURNAL, SEPTEMBER 1956 



Fig. 15 — Perforated tape being inserted in reader. 



inches in size, the label of Avhich carries all pertinent information required 

 for setup of the option keys, preliminary tests and manual operations 

 during test. A separate 12 conductor cable equipped with individual 

 test clips permits connection to internal parts of the circuit if needed 

 for adequate tests. No other information than that on the box label, 

 the circuit schematic and the lamp panel display is needed by the tester 

 to operate the test set and to analyze and locate circuit faults when 

 they occur. 



With the tape inserted, the test connections established and am'- 

 preliminary operations pei-formed the tester has only to push the RESET 

 button to index the tape to the initial perforation on the tape and the 

 START button to initiate the test cycle. The set will continue to operate 

 until either a circuit trouble is encountered or a manual operation must 

 be performed. After a defect has been repaired, the automatic progres- 

 sion of the tape is again started by the momentary depression of the 

 STEP button. When a manual operation is performed the tape is re- 

 started by the momentary depression of the red button associated with 

 the lighted manual operation lamp signal. 



