User Contributed MET/CAL PROCEDURE ============================================================================= INSTRUMENT: TEK.7A26: DUAL TRACE AMPLIFIER; ILCM 320; PREFORMANCE DATE: 25-Nov-92 AUTHOR: User Contributed REVISION: ILCM 12-320-CU2-A ADJUSTMENT THRESHOLD: 70% NUMBER OF TESTS: 36 NUMBER OF LINES: 195 CONFIGURATION: Tektronix CG5001 ============================================================================= STEP FSC RANGE NOMINAL TOLERANCE MOD1 MOD2 3 4 CON 1.001 HEAD {****7A26 DUAL TRACE AMPLIFIER PART 1/P****} 1.002 ASK+ P S M L T 1.003 ASK- R B J F W 1.004 RSLT = 1.005 DRAW 2 70 6 78 100 0 0100 1.006 SET 1.007 DISP The below listed ADDITIONAL EQUIPMENT "OR EQUIVALENT" 1.007 DISP will be required to perform this Preformance. Obtain 1.007 DISP the equipment at this time. 1.007 DISP 1.007 DISP TEKTRONIX 7000 SERIES O'SCOPE 1.007 DISP TEKTRONIX 7B71 OR 7B85 TIMEBASE MODULE 1.008 HEAD ****7A26 PRELIMINARY EQUIPMENT CONFIGURATION**** 1.009 DISP Configure the 7A26 module into a functional O'Scope. 1.009 DISP system as follows: 1.009 DISP (1) Turn 7000 series O'scope POWER OFF. 1.009 DISP (4) Insert 7A26 into LEFT VERT COMPARTMENT 1.009 DISP (5) Insert 7B SERIES TIME BASE in HORIZ compartment 1.009 DISP (6) Turn 7000 series O'scope POWER ON 1.010 HEAD {**** MECHANICAL FUNCTION OF SWITCHES AND CONTROLS****} 1.011 DISP Check 7A26 controls and switch actuators for smooth 1.011 DISP mechanical operation. Also tighten knobs and handles 1.011 DISP or replace if broken. 1.012 EVAL {Is The Mechanical operation of all controls proper}? 2.001 EVAL {Are knobs and switch Actuators tightened and in good repair}? 3.001 HEAD ****** 7A26 PRELIMINARY CALIBRATION SETUP ****** 3.002 OPBR DO YOU WANT THE PRELIMINARY SET UP INFORMATION? 3.003 JMPF 3.009 3.004 SET DISPLAY MODE: CH1[Draw55,65,F][D4000] 3.004 SET TRIG. SOURCE: MODE[DRAW55,60,F][D4000] 3.004 SET BW: FULL[DRAW55,35,F][D4000] 3.004 SET CH1 VOLTS/DIV: 10mV[DRAW75,70,F][D4000] 3.004 SET CH1 AC-GND-DC: DC[DRAW70,70,F][D4000] 3.004 SET CH1 VAR. VOLTS/DIV: CAL,IN[DRAW75,70,F] 3.005 SET CH2 VOLTS/DIV: 10mV[DRAW25,70,F][D4000] 3.005 SET CH2 AC-GND-DC: DC[DRAW10,70,F][D4000] 3.005 SET CH2 VAR. VOLTS/DIV: CAL,IN[DRAW25,70,F][D4000] 3.005 SET CH2 POLARITY: +UP[DRAW50,5,F] 3.006 SET TIME BASE TIME/DIV: 1mSEC 3.006 SET TIME BASE COUPLING: AC 3.006 SET VAR. TIME/DIV: CAL,IN 3.006 SET TIME BASE TRIG MODE: AUTO 3.006 SET TIME BASE TRIG SOURCE: INTERNAL 3.007 DISP CH1 POSITION CONTROL: MIDRANGE[DRAW 78,25,F][D4000] 3.007 DISP CH2 POSITION CONTROL: MIDRANGE[DRAW33,25,F] 3.008 DISP 7704 VERT MODE: LEFT 3.008 DISP 7704 TRIG SOURCE: VERT MODE 3.008 DISP CONFIGURE O'SCOPE HORIZONTAL MODE SWITCHES TO 3.008 DISP COINSIDE WITH LOCATION PREVIOUSLY CHOSEN FOR 3.008 DISP 7B SERIES MODULE. 3.009 DISP ALLOW AT LEAST 20 MINUTES WARM UP BEFORE PROCEEDING 3.010 HEAD {****7A26 CH1 DC BALANCE****} 3.011 DISP Position the trace to the center horizontal line with 3.011 DISP the CH1 position control 3.012 MESS SWITCH CH1 VOLTS/DIV CONTROL BETWEEN THE 5mV AND 3.012 MESS 10mV POSITIONS 3.013 EVAL CHECK DOES TRACE MOVE NO MORE THAN O.5 DIVISIONS? 4.001 SET CH1 VOLTS/DIV: 5mV 4.001 SET CH1 VAR. VOLTS/DIV: OUT 4.002 MESS TURN {CH1 VARIABLE (VOLTS/DIV) CONTROL} FROM FULLY 4.002 MESS COUNTERCLOCKWISE TO FULLY CLOCKWISE 4.003 EVAL CHECK DOES TRACE MOVE NO MORE THAN 0.5 DIVISIONS? 5.001 HEAD {****7A26 CH2 DC BALANCE****} 5.002 SET CH1 VAR. VOLTS/DIV: CAL,IN 5.002 SET CH2 VOLTS/DIV: 5mV 5.002 SET DISPLAY MODE: CH2 5.003 DISP Position the trace to the center horizontal line with 5.003 DISP the CH2 POSITION CONTROL 5.004 MESS SWITCH CH2 VOLTS/DIV CONTROL BETWEEN THE 5mV AND 5.004 MESS 10mV POSITIONS. 5.005 EVAL CHECK DOES TRACE MOVE NO MORE THAN 0.5 DIVISIONS? 6.001 SET CH2 VOLTS/DIV: 5mV 6.002 SET CH2 VAR. VOLTS/DIV: OUT 6.003 MESS TURN {CH2 VARIABLE (VOLTS/DIV) CONTROL} FROM FULLY 6.003 MESS COUNTERCLOCKWISE TO FULLY CLOCKWISE 6.004 EVAL CHECK DOES TRACE MOVE NO MORE THAN 0.5 DIVISIONS? 7.001 SET CH2 VAR. VOLTS/DIV: CAL,IN 7.001 SET CH2 POLARITY: +UP 7.001 SET BW: 20MHZ 7.002 MESS SWITCH THE {BW SWITCH FROM FULL TO 20MHz} 7.003 EVAL CHECK DOES TRACE MOVE NO MORE THAN 0.5 DIVISIONS? 8.001 SET BW: FULL 8.002 HEAD {****7A26 CH2 GAIN CALIBRATION****} 8.003 DISP CONNECT CG551 OUTPUT TO THE CH2 INPUT BNC CONNECTOR. 8.004 MESS POSITION THE DISPLAY TO THE CENTER OF THE GRATICULE 8.004 MESS WITH THE CH2 POSITION CONTROL. 8.005 RSLT =CH2 GAIN CONTROL SETTING 8.006 5001 5 20mVpp 1.5% 1kH 9.001 SET CH2 AC-GND-DC: AC 9.001 SET CH2 POLARITY: INVERT 9.002 5001 20mVpp 1kH -D S 9.003 MESS Switch {CH2 POLARITY} from +UP to INVERT 9.004 EVAL CHECK DOES "AMPLITUDE" CHANGE NO MORE THAN 0.1 DIVISION? 10.001 SET CH2 AC-GND-DC: DC 10.001 SET CH2 VOLTS/DIV: 10mV 10.001 SET CH2 POLARITY: +UP 10.002 DISP {CH2 2X GAIN CIRCUIT} 10.003 5001 10 50mVpp 1.5% 1kH 11.001 HEAD {****7A26 CH1 GAIN CALIBRATION****} 11.002 SET DISPLAY MODE: CH1 11.003 DISP Move CG551 output to CH1 input BNC connector 11.004 MESS POSITION TRACE TO CENTER OF GRATICULE USING CH1 11.004 MESS POSITION CONTROL. 11.005 RSLT =CH1 GAIN CONTROL SETTING 11.006 5001 5 20mVpp 1.5% 1kH 12.001 SET CH1 VOLTS/DIV: 10mV 12.002 DISP {CH1 2X GAIN CIRCUIT} 12.003 5001 10 50mVpp 1.5% 1kH 13.001 HEAD {***7A26 CH1 DEFLECTION FACTOR ACCURACY***} 13.002 SET BW: FULL 13.003 DISP Note leave AC-GND-DC in DC during DEFLECTION TESTING. 13.004 ASK+ R 13.005 MEM2 =CH1 VOLTS/DIV 13.006 MESS 13.007 5001 20 100mVpp 2% 1kH 14.001 5001 50 200mVpp 2% 1kH 15.001 5001 0.1 0.5Vpp 2% 1kH 16.001 5001 0.2 1Vpp 2% 1kH 17.001 5001 0.5 2Vpp 2% 1kH 18.001 5001 1 5Vpp 2% 1kH 19.001 5001 2 10Vpp 2% 1kH 20.001 5001 5 20Vpp 2% 1kH 21.001 HEAD {***7A26 CH2 DEFLECTION FACTOR ACCURACY***} 21.002 MEM2 =CH2 VOLTS/DIV 21.003 SET DISPLAY MODE: CH2 21.003 SET CH2 POLARITY: +UP 21.004 DISP Move CG551 output to CH2 input BNC connector 21.005 5001 20 100mVpp 2% 1kH 22.001 5001 50 200mVpp 2% 1kH 23.001 5001 0.1 0.5Vpp 2% 1kH 24.001 5001 0.2 1Vpp 2% 1kH 25.001 5001 0.5 2Vpp 2% 1kH 26.001 5001 1.0 5.0Vpp 2% 1kH 27.001 5001 2.0 10.0Vpp 2% 1kH 28.001 5001 5.0 20Vpp 2% 1kH 29.001 HEAD {***7A26 CH2 VARIABLE VOLTS "RANGE"***} 29.002 SET CH1 VOLTS/DIV: 10mV 29.002 SET CH2 VOLTS/DIV:10mV 29.002 SET CH2 VAR. VOLTS/DIV: OUT 29.003 5001 50mVpp 1kH -D S 29.004 MESS TURN CH2 VARIABLE CONTROL FULLY COUNTERCLOCKWISE 29.005 EVAL CHECK IS TRACE LESS THAN OR EQUAL TO 2 DIVISIONS? 30.001 5001 50mVpp 1kH -D S 30.002 MESS Switch CH2 POLARITY from +UP to INVERT 30.003 EVAL CHECK DOES TRACE REMAIN LESS THAN OR EQUAL TO 2 DIVISIONS? 31.001 HEAD {***7A26 CH1 VARIABLE VOLTS "RANGE"***} 31.002 SET CH2 VAR. VOLTS/DIV: IN 31.002 SET CH1 VAR. VOLTS/DIV: OUT 31.002 SET DISPLAY MODE: CH1 31.002 SET CH2 POLARITY: +UP 31.003 DISP Move CG551 output from CH2 input to CH1 input connector 31.004 5001 50mVpp 1kH -D S 31.005 MESS TURN CH1 VARIABLE CONTROL FULLY COUNTERCLOCKWISE 31.006 EVAL CHECK IS TRACE LESS THAN OR EQUAL TO 2 DIVISIONS? 32.001 DISP Disconnect Output of CG551 FROM UUT 32.002 SET CH1 VAR. VOLTS/DIV: IN 32.003 HEAD {****TRACE IDENTIFY****} 32.004 DISP Center trace vertically with CH1 POSITION control 32.005 MESS PRESS CH1 IDENTIFY BUTTON 32.006 EVAL CHECK DOES TRACE MOVE UPWARD?[DRAW78,25,F] 33.001 SET DISPLAY MODE: CH2 33.002 DISP Center trace vertically with CH2 POSITION control 33.003 MESS PRESS CH2 IDENTIFY BUTTON 33.004 EVAL CHECK DOES TRACE MOVE UPWARD?[DRAW33,33,F] 34.001 HEAD {***7A26 CH1 LOW-FREQUENCY COMPENSATION***} 34.002 SET TIME BASE TIME/DIV: .2mSEC 34.002 SET CH1 AC-GND-DC: DC 34.002 SET CH2 AC-GND-DC: DC 34.002 SET DISPLAY MODE: CH1 34.003 DISP Connect CG551 output with a 50 ohm terminator to 34.003 DISP the CH1 Input Connector 34.004 5001 60mVpp 1kH -D E S L 34.005 MESS CHECK IS SQUARE WAVE FLATTOP (DECAY/SLANT) LESS 34.006 EVAL THAN 0.2 DIVISIONS? 35.001 HEAD {***7A26 CH2 LOW FREQUENCY COMPENSATION***} 35.002 SET DISPLAY MODE: CH2 35.003 DISP Move CG551 output with 50 Ohm terminator to CH2 Input 35.004 5001 60mVpp 1kH -D E S L 35.005 MESS CHECK IS SQUARE WAVE FLATTOP (DECAY/SLANT) LESS 35.006 EVAL THAN 0.2 DIVISIONS? 36.001 CALL TEK.7A26: DUAL TRACE AMPLIFIER PART 2/P 36.002 CALL TEK.7A26: DUAL TRACE AMPLIFIER PART 3/P 36.003 END