Performance Check/Calibration—Type 422 AC-DC
13. Check/Adjust Channel 1 Step Attenu- Page 5-16
ator and Variable Balance (R21, R35)
REQUIREMENT: Step attenuator balance, less than 0.1
division vertical trace shift as Channel 1 VOLTS/DIV
switch is changed from .05 to .01. Variable balance, less
than 0.2 division vertical trace shift as. Channel 1
VARIABLE VOLTS/DIV control is rotated throughout its
range.
PERFORMANCE: Step attenuator balance,
-------
division shift. Variable balance,
-------
division shift.
14. Check/Adjust Channel 2 Step Attenua- Page 5-17
tor and Variable Balance (R121, R135)
REQUIREMENT: Step attenuator balance, less than 0.1
division vertical trace shift as Channel 2 VOLTS/DIV
switch is changed from .05 to .01. Variable balance, less
than 0.2 division vertical trace shift as Channel 2
VARIABLE VOLTS/DIV control is rotated throughout its
range.
PERFORMANCE: Step attenuator balance,--------
division shift. Variable balance,--------division shift.
15. Adjust Common-Mode Current (R215) Page 5-17
REQUIREMENT: Correct operation; see complete
procedure.
PERFORMANCE: Correct
-------
; incorrect
----------
16. Check/Adjust Channel 1 and 2 Gain Page 5-18
(R80, R180)
REQUIREMENT: Four divisions ±0.12 division vertical
deflection at .05 VOLTS/DIV with 0.2-volt square-wave
input.
PERFORMANCE: Four divisions ± -------division.
17. Check Added Mode Operation Page 5-19
REQUIREMENT: Correct signal addition within 3%.
PERFORMANCE: Correct
-------
; incorrect
--------
.
18. Check Channel 1 and 2 Deflection Page 5-19
Accuracy
REQUIREMENT: Vertical deflection factor within 3%
of Channel 1 and 2 VOLTS/DIV switch indication.
PERFORMANCE: Correct_____; incorrect (list excep
tions)
___________________________________________
_
19. Check Channel 2 X I0 Gain Page 5-19
REQUIREMENT: Four divisions ±0.16 division vertical
deflection at .05 VOLTS/DIV, X10 GAIN AC pulled out
with 20-millivolt square-wave input.
PERFORMANCE: Four divisions ±
-----
division.
20. Check Channel 1 and 2 Variable Page 5-19
Volts/Division Control Range
REQUIREMENT: Continuously variable between the
calibrated settings of the VOLTS/DIV switches.
PERFORMANCE: Correct
-----
; incorrect---------
21. Check Low-Frequency Vertical Lin- Page 5-19
earity
REQUIREMENT: 0.15 division or less compression or
expansion of a center-screen two-division signal when
positioned to the vertical extremes of the graticule area.
PERFORMANCE:
_____
division.
22. Check Channel 1 and 2 Input Coupling Page 5-20
Switch Operation
REQUIREMENT: Correct signal coupling in each
position of the Channel 1 and 2 Input Coupling switches.
PERFORMANCE: Correct
------
; incorrect
--------
23. Check Trace Shift Due to Input Current Page 5-20
REQUIREMENT: Negligible at .01 VOLTS/DIV as
Channel 1 and 2 Input Coupling switches are changed from
GND to DC.
PERFORMANCE: Correct------; incorrect
-------
.
24. Check Alternate Operation Page 5-21
REQUIREMENT: Trace alternation at all sweep rates.
PERFORMANCE: Correct
-----
; incorrect
------
.
25. Check/Adjust Channel 1 Volts/Division Page 5-21
Switch Compensation (C3B, C3C, C4B, C4C,
C5B, C5C, C6B, C6C, C12)
REQUIREMENT: Optimum square corner and flat top
within +3% or —3% with total peak-to-peak aberrations not
to exceed 3% at each Channel 1 VOLTS/DIV switch
position.
PERFORMANCE: Correct
__
; incorrect (list excep
tions)
___________________________________________
,
5-4
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