O16-DPT9 rev A

* 0520-001-H002 (O16-DPT9) DRAWING NO. 41285751-001-01 PAGE 5

0201 * BEFORE A TEST IS RUN ON A PLOTTER, THE RELEVANT PARAMETERS ARE SET 0202 * UP BY TYPING IN APPROPRIATE ANSWERS TO THE PARAMETER QUESTIONS AS 0203 * DESCRIBED ABOVE. AFTER THE FIRST OUESTION IS ANSWERED UNIT, LMAX 0204 * AND LMIN ARE SET UP AS DESCRIBED BELOW: 0205 * 0206 * OPTN UNIT (NUMBER OF STEPS IN ONE UNIT LENGTH) 0207 * ---- ---- ------------------------------------ 0208 * 2111 20 = 20*0.005 IN = 0.1 IN 0209 * 2112 10 = 10*0.010 IN = 0.1 IN 0210 * 2113 20 = 20*0.100 MM = 2.0 MM 0211 * 2114 10 = 10*0.200 MM = 2.0 MM 0212 * 0213 * OPTN LMAX (NUMBER OF STEPS IN MAXIMUM RANGE OF EAST-WEST LIMIT) 0214 * ---- ---- ----------------------------------------------------- 0215 * 2111 2730 = (13/0.005)*(21/20) 0216 * 2112 1365 = (13/0.010)*(21/20) 0217 * 2113 3465 = (330/0.10)*(21/20) 0218 * 2114 1733 = (330/0.20)*(21/20) 0219 * 0220 * OPTN LMIN (NUMBER OF STEPS IN MINIMUM RANGE OF EAST-WEST LIMIT) 0221 * ---- ---- ----------------------------------------------------- 0222 * 2111 2470 = (13/0.005)*(19/20) 0223 * 2112 1235 = (13/0.010)*(19/20) 0224 * 2113 3135 = (330/0.10)*(19/20) 0225 * 2114 1567 = (330/0.20)*(19/20) 0226 * 0227 * WHEN THE LAST PARAMETER QUESTION IS ANSWERED, THE PROGRAM GOES 0228 * THROUGH INITIALISATION ROUTINE, CHECKING BUSY AND INTERRUPT FLIP- 0229 * FLOPS. THE LIMIT IS ALSO CHECKED TO ENSURE THAT IT DOES NOT OCCUR 0230 * IN LESS THAN FIVE PERCENT OF THE SPECIFIED VALUE AND DOES OCCUR 0231 * WITHIN MORE THAN FIVE PERCENT OF THE SPECIFIED VALUE. AFTER THAT 0232 * THE QUESTION 'TEST N0?' IS ASKED. IF IT IS DESIRED TO REPEAT THE 0233 * INITIALISATION THE ANSWER SHOULD BE LETTER I, OTHERWISE IT SHOULD 0234 * BE 1, 2, 3, 4 OR A (ALL TESTS SEDUENTIALLY).THE APPROPRIATE 0235 * TEST/TESTS WILL THEN BE PERFORMED. ANY OR ALL TESTS MAY NOW BE 0236 * REPEATED BY RETYPING THE ANSWER. WHEN IT IS DESIRED TO END THE 0237 * SERIES OF TESTS, THE ANSWER SHOULD BE LETTER E. IF AN ERROR 0238 * CONDITION IS FOUND, THE PEN IS MOVED UP; THE APPROPRIATE ERROR 0239 * MESSAGE IS TYPED OUT; THE PEN IS MOVED NORTH TWENTY UNIT LENGTHS 0240 * AND CONTROL IS RETURNED TO THE ASR BY ASKING 'TEST NO?'. 0241 * 0242 * 0243 * TEST PATTERNS 0244 * 0245 * ALL PATTERNS ARE PLOTTED FROM THE LEFT HAND SIDE AND A GAP OF 0246 * THIRTY UNIT LENGTHS IS KEPT IN BETWEEN THE PATTERNS 0247 * 0248 * 1 PEN MOVEMENT TEST - DOTTED LINE 0249 * ------------------------------- 0250 * THIS TEST CONSISTS OF A DOTTED LINE DRAWN FROM WEST TO