TB 9-6625-2084-24
IDENTIFICATION AND DESCRIPTION
1. Test Instrument Identification.
This bulletin provides instructions for the
calibration of Oscilloscope, OS-262(P)/U (Tektronix, Type 7623A) and Tektronix, Types
7623, 7613/R7613, R7623A, 7633, and 7633 Opt 5. 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. Type 7633 has reduced span capabilities. Types with Option 5
operate from 50 to 400 Hz line frequency. OS-262(P)/U is the military designation for
Type 7623A.
b. Time and Technique. The time required for this calibration is approximately
2 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
115 V 1%, 50 to 60 Hz
Input power requirements
Vertical and horizontal linearity
Range: Dc to 1 MHz
0.5 minor division
Accuracy:
Calibrated sweep rate
Range: 10 ns to 1 ms
0.5 minor division
Accuracy:
Calibrator output
Range: 40 mV, 0.4 and 4.0 V dc
1%
Accuracy:
Risetime
3.5 ns or less
EQUIPMENT REQUIREMENTS
calibration procedure. This equipment is issued with Secondary Transfer Calibration
Standards Set AN/GSM-286, AN/GSM-287, or AN/GSM-705. Alternate items may be used
by the calibrating activity. The items selected must be verified to perform satisfactorily
prior to use and must bear evidence of current calibration. The equipment must meet or
provide a four-to-one ratio between the standard and TI. Where the four-to-one ratio
cannot be met, the actual accuracy of the equipment selected is shown in parenthesis.
