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TB 9-6625-2132-35
CHANGE 2
DEPARTMENT OF THE ARMY TECHNICAL BULLETIN
CALIBRATION PROCEDURE FOR
DIFFERENTIAL AMPLIFIERS AM-6881/U
(TEKTRONIX, TYPE 7A13)
AND AM-6786/U (TEKTRONIX, TYPE 7A22)
Headquarters, Department of the Army, Washington, DC
29 November 2005
Distribution Statement A: Approved for public release; distribution is unlimited.
TB 9-6625-2132-35, 23 March 2005, is changed as follows:
1. Remove old pages and insert new pages as indicated below. New or changed material is
indicated by a vertical bar in the margin of the page.
Remove Pages Insert Pages
5 and 6 5 and 6
2. File this change sheet in front of the publication for reference purposes.
By Order of the Secretary of the Army:
PETER J. SCHOOMAKER
General, United States Army
Official: Chief of Staff
SANDRA R. RILEY
Administrative Assistant to the
Secretary of the Army
0527602
Distribution:
To be distributed in accordance with IDN 342240, requirements for calibration procedure
TB 9-6625-2132-35.
TB 9-6625-2132-35
CHANGE 1
DEPARTMENT OF THE ARMY TECHNICAL BULLETIN
CALIBRATION PROCEDURE FOR
DIFFERENTIAL AMPLIFIERS AM-6881/U
(TEKTRONIX, TYPE 7A13)
AND AM-6786/U (TEKTRONIX, TYPE 7A22)
Headquarters, Department of the Army, Washington, DC
13 September 2005
Distribution Statement A: Approved for public release; distribution is unlimited.
TB 9-6625-2132-35, 23 March 2005, is changed as follows:
1. Remove old pages and insert new pages as indicated below. New or changed material is
indicated by a vertical bar in the margin of the page.
Remove Pages Insert Pages
7 and 8 7and 8
2. File this change sheet in front of the publication for reference purposes.
By Order of the Secretary of the Army:
PETER J. SCHOOMAKER
General, United States Army
Official: Chief of Staff
SANDRA R. RILEY
Administrative Assistant to the
Secretary of the Army
0519607
Distribution:
To be distributed in accordance with IDN 342240, requirements for calibration procedure
TB 9-6625-2132-35.
*TB 9-6625-2132-35
DEPARTMENT OF THE ARMY TECHNICAL BULLETIN
CALIBRATION PROCEDURE FOR
DIFFERENTIAL AMPLIFIERS AM-6881/U
(TEKTRONIX, TYPE 7A13)
AND AM-6786/U (TEKTRONIX, TYPE 7A22)
Headquarters, Department of the Army, Washington, DC
23 March 2005
Distribution Statement A: Approved for public release; distribution is unlimited.
REPORTING OF ERRORS AND RECOMMENDING IMPROVEMENTS
You can improve this manual. If you find any mistakes or if you know of a way
to improve these procedures, please let us know. Mail your letter or DA Form
2028 (Recommended Changes to Publications and Blank Forms) directly to:
Commander, US Army Aviation and Missile Command, AMSAM-MMC-MA-NP,
Redstone Arsenal, AL 35898-5000. A reply will be furnished to you. You may
also provide DA Form 2028 information to AMCOM via e-mail, fax, or the World
Wide Web. Our fax number is DSN 788-6546 or Commercial 256-842-6546. Our
e-mail address is [email protected]. Instructions for sending an
electronic 2028 may be found at the back of this manual. For the World Wide
Web, use https://amcom2028.redstone.army.mil.
Paragraph Page
SECTION I. IDENTIFICATION AND DESCRIPTION
Test instrument identification ............................ 1 2
Forms, records, and reports................................. 2 2
Calibration description ........................................ 3 2
II. EQUIPMENT REQUIREMENTS
Equipment required ............................................. 4 3
Accessories required............................................. 5 3
III. CALIBRATION PROCESS FOR
DIFFERENTIAL AMPLIFIER
TEKTRONIX, TYPE 7A13
Preliminary instructions...................................... 6 4
Equipment setup .................................................. 7 4
Gain and deflection accuracy............................... 8 6
Comparison voltage and linearity....................... 9 7
+INPUT and -INPUT attenuator
compensation ..................................................... 10 8
High-frequency response and risetime ............... 11 9
Final procedure .................................................... 12 11
_________
*This bulletin supersedes TB 9-6625-2132-35, dated 25 Apr 1985, including all changes.
TB 9-6625-2132-35
Paragraph Page
IV. CALIBRATION PROCESS FOR
DIFFERENTIAL AMPLIFIER
TEKTRONIX, TYPE 7A22
Preliminary instructions...................................... 13 11
Equipment setup .................................................. 14 11
Gain and attenuator accuracy ............................. 15 12
Attenuation compensation................................... 16 13
Input attenuator differential balance ................. 17 14
HF and LF-3 dB point.......................................... 18 15
Final procedure .................................................... 19 16
SECTION I
IDENTIFICATION AND DESCRIPTION
1. Test Instrument Identification. This bulletin provides instructions for the
calibration of Differential Amplifiers AM6881/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.
2
TB 9-6625-2132-35
Table 1. Calibration Description
Test instrument parameters Performance specifications
Tektronix, Type 7A13
Deflection factor Range: 1 mV/div to 5 V/div
Accuracy: