User Contibuted                                               7411B PROCEDURE
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INSTRUMENT:            Hewlett Packard   5381A   Counter   No Options.
DATE:                  22-Jul-88
AUTHOR:                User Contributed
REVISION:              0.1
ADJUSTMENT THRESHOLD:  70%
NUMBER OF TESTS:       23
NUMBER OF LINES:       83
CONFIGURATION:         Wavetek 278A                Fluke 6060B
===============================================================================
STEP    FSC    RANGE NOMINAL        TOLERANCE     MOD1        MOD2  3  4  CON
  1.001  ASK-                          J
  1.002  DRAW           5 78  7 78                  83 25 67 75
  1.003  HEAD         Initial Preparation.
  1.004  DISP         Remove the 4 Phillips screws from the bottom of the
  1.004  DISP         unit.
  1.004  DISP         Turn the unit upright & remove the top cover.
  1.005  SET          LINE: ON    [DRAW17,20,F]
  1.006  SET          GATE TIME: 1S   [DRAW33,20,F]
  1.007  SET          ATTENUATOR: X1   [DRAW33,80,F]
  1.008  SET          OSCILLATOR EXT/INT: INT   [DRAW17,10,B]
  1.009  HEAD         {Amplifier Balance.}
  1.010  DISP         Temporarilly remove the top cover.
  1.011  278          1MH                          30mV              SI S  L
  1.012  DISP         Connect an oscilloscope to TP6.  [DRAW44,86,T]
  1.013  EVAL   {Is the 'scope's display a 50% duty cycle square wave?}
  1.014         278   1MH                          30mV              SI S  L
  1.015         DISP  Adjust A1R19 for a 50% duty cycle square wave on 'scope.
  1.015         DISP  [DRAW22,64,T]
  2.001  DISP         Replace the top cover.
  2.002  HEAD         {Attenuator Check.}
  2.003  278          1MH                          30mV              SI S  L
  2.004  EVAL   {Is the counter triggered & does the display read near 1 MHz?}
  3.001  SET          ATTENUATOR: X10   [DRAW33,80,F]
  3.002  278          1MH                          300mV             SI S  L
  3.003  EVAL   {Is the counter triggered & does the display read near 1 MHz?}
  4.001  SET          ATTENUATOR: X100    [DRAW33,80,F]
  4.002  278          1MH                          3V                SI S  L
  4.003  EVAL   {Is the counter triggered & does the display read near 1 MHz?}
  5.001  HEAD         {Time Base.}
  5.002  SET          ATTENUATOR: X10    [DRAW33,80,F]
  5.003  DISP         If the unit has not been on for 5 minutes yet, let sit
  5.003  DISP         until 5 minutes have elapsed.
  5.004  MESS         Over range is indicated by a dot above & to the left of
  5.004  MESS         the MSD of the display.
  5.005  6060         10000KH        .01U          300mV          -D
  5.006         6060  10MH                         300mV                S
  5.007         DISP  Adjust OSCILLATOR ADJ for a display of 10 MHz +/- 10 Hz.
  5.007         DISP  [DRAW17,25,B]
  6.001  MESS
  6.002  SET          GATE TIME: 10S   [DRAW33,20,F]
  6.003  M278         B4
  6.004  278          11H            .1U 2%        300mV          -D SI    L
  7.001  278          100H           .1U .0005%    300mV          -D SI    L
  8.001  278          1000H          .1U .0005%    300mV          -D SI    L
  9.001  278          10000H         .1U .0005%    300mV          -D SI    L
 10.001  278          100000H        .1U .0005%    300mV          -D SI    L
 11.001  278          900000H        .1U .0005%    300mV          -D SI    L
 12.001  SET          GATE TIME: 1S   [DRAW33,20,F]
 12.002  278          .011KH         .001U 2%      300mV          -D SI    L
 13.001  278          .1KH           .001U .0005%  300mV          -D SI    L
 14.001  278          1KH            .001U .0005%  300mV          -D SI    L
 15.001  278          10KH           .001U .0005%  300mV          -D SI    L
 16.001  278          100KH          .001U .0005%  300mV          -D SI    L
 17.001  278          1000KH         .001U .0005%  300mV          -D SI    L
 18.001  278          9000KH         .001U .0005%  300mV          -D SI    L
 19.001  M278         B0
 19.002  SET          GATE TIME: .1S   [DRAW33,20,F]
 19.003  6060         110KH          .01U .0001%   300mV          -D
 20.001  6060         1000KH         .01U .0001%   300mV          -D
 21.001  6060         10000KH        .01U .0001%   300mV          -D
 22.001  6060         80000KH        .01U .0001%   500mV          -D
 23.001  DISP         Re-assemble the unit. You are finished with calibration.
END