User Contributed 7411B PROCEDURE ================================================================================ INSTRUMENT: Hewlett Packard 5321B Counter. DATE: 21-Oct-88 AUTHOR: User Contributed REVISION: 0.4 ADJUSTMENT THRESHOLD: 70% NUMBER OF TESTS: 26 NUMBER OF LINES: 115 CONFIGURATION: Fluke 8506A Fluke 1953A Wavetek 278A Fluke 5200A =============================================================================== STEP FSC RANGE NOMINAL TOLERANCE MOD1 MOD2 3 4 CON 1.001 DRAW 7 78 8 78 75 10 25 75 1.002 DISP Remove the bottom & left side covers. 1.003 ASK- J 1.004 DISP Turn the unit on. [DRAW25,5,F] 1.005 HEAD {Power Supply Checks.} 1.006 DISP Connect System Meter to A5(6). This is the 6th pin 1.006 DISP behind the 2 pots. [DRAW56,29,U] 1.007 8506 155V 10U 2W 1.008 DISP A5R1 is here, the rearmost of 2 pots. [DRAW33,55,L] 1.009 MESS Adjust R1 for 155V. 1.010 8506 155V S 2W 1.011 MESS 2.001 DISP Connect System Meter to A5(1). This is the terminal 2.001 DISP directly behind the first pot. [DRAW56,24,U] 2.002 8506 5.1V .15U 2W 2.003 DISP A5R6 is here, the pot nearest the front. [DRAW33,60,L] 2.004 MESS Adjust R6 for 5.1V. 2.005 8506 5.1V S 2W 2.006 MESS 3.001 DISP Connect System Meter to A5(5), the 5th pin behind the 3.001 DISP 2 pots. [DRAW56,24,U] 3.002 8506 -12V .5U 2W 4.001 HEAD {Time Base.} 4.002 DISP Connect System Counter to A3(B), the 2nd pin from the 4.002 DISP edge of the outer row of pins. [DRAW44,18,U] 4.003 1953 1MH .001% 1V 11 A 4.004 DISP C8 is here. [DRAW0,35,L] 4.005 MESS Adjust C8 for 1 MHz +/- 10 Hz. 4.006 1953 1MH 1V 11 S A 4.007 MESS 5.001 HEAD {Trigger Sensitivity Checks.} 5.002 DISP Set GATE SELECTOR switch to 1 SEC. [DRAW50,85,F] 5.003 DISP Set SENSITIVITY to .1V. [DRAW50,85,F] 5.004 DISP The INPUT is here. [DRAW0,80,F] 5.005 DISP Connect oscilloscope probe to connector A1(1), Input Bd. 5.005 DISP This is the inner pin of the six on the board. 5.005 DISP [DRAW33,76,U] 5.005 DISP This is directly in front of the power transformer. 5.006 MESS Display should be a square wave of 50% duty cycle. 5.007 278 100KH .1V SI S L 5.008 EVAL {Is the display on the 'scope a square wave @ 50% duty cycle?} 5.009 278 100KH .1V SI S L 5.010 DISP Adjust A1R20 for a square wave of 50% duty clcle. 5.010 DISP [DRAW56,59,U] 5.010 DISP This is on the Input Board. 6.001 MESS 6.002 5200 .1V 1KH S 2W 6.003 EVAL {Is the counter triggered & reading near 1 kHz?} 7.001 DISP Set SENSITIVITY to 1V. [DRAW50,85,F] 7.002 5200 1V 1KH S 2W 7.003 EVAL {Is the counter triggered & reading near 1 kHz?} 8.001 DISP Set SENSITIVITY to 10V. [DRAW50,85,F] 8.002 5200 10V 1KH S 2W 8.003 EVAL {Is the counter triggered & reading near 1 kHz?} 9.001 DISP Set SENSITIVITY back to .1V [DRAW50,85,F] 9.001 DISP 9.001 DISP Set GATE SELECTOR to 10 SEC. 9.002 MESS Display should be a square wave @ 50% duty cycle. 9.003 M278 B0 9.004 278 5H .1U 2% .1V -D SI L 10.001 M278 B4 10.002 278 30H .1U .001% .1V -D SI L 11.001 278 100H .1U .001% .1V -D SI L 12.001 278 500H .1U .001% .1V -D SI L 13.001 278 1000H .1U .001% .1V -D SI L 14.001 278 9000H .1U .001% .1V -D SI L 15.001 DISP Set GATE SELECTOR to 1 SEC. [DRAW50,85,F] 15.002 278 1000H 1U .001% .1V -D SI L 16.001 278 10000H 1U .001% .1V -D SI L 17.001 278 90000H 1U .001% .1V -D SI L 18.001 DISP Set the GATE SELECTOR switch to .1 SEC. [DRAW50,85,F] 18.002 278 10000H 10U .001% .1V -D SI L 19.001 278 100000H 10U .001% .1V -D SI L 20.001 278 900000H 10U .001% .1V -D SI L 21.001 DISP Set the GATE SELECTOR switch to .01 SEC. [DRAW50,85,F] 21.002 278 100000H 100U .001% .1V -D SI L 22.001 278 1000000H 100U .001% .1V -D SI L 23.001 278 5000000H 100U .001% .1V -D SI L 24.001 278 9990000H 100U .001% .1V -D SI L 25.001 EVAL Was the display jitter-free & 50% duty cycle at all freqs.???? 25.002 278 100KH .1V SI S L 25.003 DISP Adjust A1R20 fully CW. 25.003 DISP [DRAW44,59,U] 25.003 DISP This is on the little board directly in front of the 25.003 DISP power transformer. 25.004 DISP Turn the same pot CCW until the display on 'scope is a 25.004 DISP square wave of 50% duty cycle. 25.005 M278 25.006 278 * S 25.007 JMP 9.002 26.001 DISP End of Cal Procedure. Remove all Connections. 26.002 M278 B0 26.003 278 * S END