TB 9-6625-2132-24
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CALIBRATION PROCESS FOR
DIFFERENTIAL AMPLIFIER
TEKTRONIX, TYPE 7A22
Preliminary instructions......................................
Equipment setup ..................................................
Gain and attenuator accuracy .............................
Attenuation compensation...................................
Input attenuator differential balance .................
HF and LF-3 dB point ..........................................
Final procedure ....................................................
IDENTIFICATION AND DESCRIPTION
1. Test Instrument Identification.
This bulletin provides instructions for the
calibration of Differential Amplifiers AM-6881/U (Tektronix, Type 7A13) and AM-6786/U
(Tektronix, Type 7A22). The manufacturers' manuals were used as the prime data source
in compiling these instructions. The equipment being calibrated will be referred to as the
TI (test instrument) throughout this bulletin.
a. Model Variations. Variations among models are described in text, tables, and
figures.
b. Time and Technique. The time required for this calibration is approximately 4
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
Tektronix, Type 7A13
Deflection factor
Range: 1 mV/div to 5 V/div
Accuracy: 1.5%
Risetime: 3.5 ns or less1
Frequency response
Accuracy: Aberrations less than 3% of displayed
square wave
Range: 0 to 10 V
Comparison voltage
Accuracy: 0.1% of setting +5 mV
See footnote at end of table.
