TB 9-6625-1200-24
IDENTIFICATION AND DESCRIPTION
1. Test Instrument Identification.
This bulletin provides instructions for the
calibration of Oscilloscope, Tektronix, Types 422 and 422MOD125B. The manufacturers'
manuals were used as the prime data sources in compiling these instructions. The
equipment being calibrated will be referred to as the TI (test instrument) throughout this
bulletin.
a. Model Variations. None.
b. Time and Technique. The time required for this calibration is approximately 3
hours, using the dc and low frequency technique.
2. Forms, Records, and Reports
a. Forms, records, and reports required for calibration personnel at all levels are
prescribed by TB 750-25.
b. Adjustments to be reported are designated (R) at the end of the sentence in which
they appear. When adjustments are in tables, the (R) follows the designated adjustment.
Report only those adjustments made and designated with (R).
3. Calibration Description. TI parameters and performance specifications which
pertain to this calibration are listed in table 1.
Table 1. Calibration Description
Test instrument parameters
Performance specifications
Power input requirement
115 V ac 10% at 50 to 400 Hz
Vertical sensitivity
Range: 0 to 20 V/div
Accuracy:
3%, X1
4% for channel 2 in X10 GAIN position
( 7.5% for S/N below 20,000)
Calibrator:
Internal
Range: 0.2 V square wave
Accuracy:
1.6% for S/N below 20,000
2.5% for S/N above 20,000
Calibrator jack
Range: 2 V square wave
Accuracy:
3.6% for S/N below 20,000
1.5% for S/N above 20,000
Risetime
24 ns or less with aberrations of 0.15 div or less
Range: 0.5 s to 0.5 s/div
Sweep timing
Accuracy:
3%
5% in X10 MAG
