Performance Check/Calibration—Type 422 AC-DC
52. Check Gate Output Signal Page 5-33
REQUIREMENT: 0.5 volt or greater amplitude; dura
tion at 1 ms/DIV, between 5.2 and 6.05 divisions at test
oscilloscope sweep rate of two milliseconds/division.
PERFORMANCE:
_____
volt amplitude;
_____
division
duration.
53. Check Chopped Operation Page 5-33
REQUIREMENT: Repetition rate, 150 kilohertz ±20%
indicated by cycle duration of 5.6 to 8.4 divisions at 1
jUs/DIV; time segment displayed from each channel, 2.0 to
4.7 microseconds; switching transients blanked out.
PERFORMANCE:----------cycle
_
duration;
---------
micro
second time segment; blanking correct ; incorrect____.
54. Check External Horizontal Operation Page 5-35
REQUIREMENT: Deflection of 4.0 to 6.7 divisions with
50-volt signal (X10 MAG switch pushed in, HORIZ ATTEN
clockwise); deflection of 4.0 to 6.7 divisions with five-volt
signal (X10 MAG switch pulled out, HORIZ ATTEN
clockwise) with a 10:1 reduction in deflection factor when
HORIZ ATTEN is turned fully counterclockwise.
PERFORMANCE: Correct
-----
; incorrect
--------
55. Check External Horizontal Bandwidth Page 5-36
REQUIREMENT: Not more than -3 dB at 500
kilohertz.
PERFORMANCE: - 3 dB point,
-------
megahertz.
56. Check External Blanking Page 5-36
REQUIREMENT: Trace blanked with two-volt positive
peak signal.
PERFORMANCE: Correct
-----
; incorrect
-------
57. Check/Adjust Calibrator Amplitude Page 5-36
REQUIREMENT: - 2 volts ±10 millivolts at CALIBRA
TOR jack with Q775 removed and —200 millivolts ±3
•millivolts internal. Check operation in CALIBRATE 4
DIVISIONS position of Channel 1 and 2 VOLTS/DIV
switches.
PERFORMANCE: External, within millivolts; in
ternal, w ith in
------
millivolts; CALIBRATE 4 DIVISIONS
Channel 1 , w ith in
-------
division; Channel 2. within
------
division.
58. Check Calibrator Repetition Rate Page 5-37
REQUIREMENT: Duration of one cycle between 4.2
and 6.3 divisions at .2 ms/DIV.
PERFORMANCE:
-------
divisions.
59. Check Calibrator Duty Cycle Page 5-37
REQUIREMENT: Length of positive segment of square
wave between 4.5 and 5.5 divisions with one complete
cycle/10 divisions.
PERFORMANCE: Positive segment,
------
divisions.
PERFORMANCE CHECK/CALIBRATION
PROCEDURE
General
The following procedure is arranged so the Type 422 can
be calibrated with the least interaction of adjustments and
reconnection of equipment. A picture of the test
equipment required for each group offsteps is given to aid
in identification of the necessary equipment. The control
settings and test equipment setup throughout this
procedure continue from the precedingiistepfs) unless noted
otherwise. The control settings can be checked at any "test
equipment required" picture by setting the controls as
given at the start of the procedure under the heading
Preliminary Control Settings. Then make any changes listed
following the "test equipment required" picture, under the
heading Partial Procedure (also applies to partial calibration
procedure).
NOTE
Control titles which are printed on the front panel of
the Type 422 are capitalized in this procedure
(e.g.JNTENSITY). Internal adjustments are initial
capitalized only (e.g., Ch 1 Gain).
The following procedure uses the equipment listed under
Test Equipment Required. If other equipment is substi
tuted, control settings or calibration setup may need to be
altered to meet the requirements of the equipment used.
Detailed operating instructions for -the test equipment are
not given in this procedure. Refer to the instruction manual
for the test equipment if more information is required.
NOTE
This instrument should be calibrated at an ambient
temperature of +25°C ±5°C for best overall accuracy.
The performance of this instrument can be checked
at any temperature within the 0°C to +40°C range. If
the ambient temperature is outside the given range,
see Section 1 for the applicable tolerances.
Preliminary Procedure for Performance Check
Only
1. Connect the Type 422 to a power source which meets
the voltage and frequency requirements of this instrument.
5-7
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