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TB 9-6625-2137-35
CHANGE 1
DEPARTMENT OF THE ARMY TECHNICAL BULLETIN
CALIBRATION PROCEDURE FOR
VOLTMETER, FREQUENCY SELECTIVE AN/USM-490(),
AND SELECTIVE LEVEL METER,
HEWLETT-PACKARD, MODELS 3586B AND 3586C
W/OPTIONS 001, 003, AND 004
Headquarters, Department of the Army, Washington, DC
26 July 2005
Distribution Statement A: Approved for public release; distribution is unlimited.
TB 9-6625-2137-35, 15 March 2004, 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
15 and 16 15 and 16
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
0505119
Distribution:
To be distributed in accordance with IDN 342243, requirements for calibration procedure
TB 9-6625-2137-35.
*TB 9-6625-2137-35
DEPARTMENT OF THE ARMY TECHNICAL BULLETIN
CALIBRATION PROCEDURE FOR
VOLTMETER, FREQUENCY SELECTIVE AN/USM-490( ),
AND SELECTIVE LEVEL METER,
HEWLETT-PACKARD, MODELS 3586B AND 3586C
W/OPTIONS 001, 003, AND 004
Headquarters, Department of the Army, Washington, DC
15 March 2004
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 REQUIREMENT
Equipment required ............................................... 4 4
Accessories required............................................... 5 4
III. CALIBRATION PROCESS
Preliminary instructions........................................ 6 6
Equipment setup .................................................... 7 6
Center frequency .................................................... 8 7
Counter ................................................................... 9 7
Return loss.............................................................. 10 7
Balance.................................................................... 11 9
Amplitude ............................................................... 12 12
Half power bandwidth ........................................... 13 14
Bandpass flatness .................................................. 14 15
_________
*This bulletin supersedes TB 9-6625-2137-35, dated 31 December 1996.
TB 9-6625-2137-35
Paragraph Page
400 Hz shape and 20 Hz pilot filters,
bandwidth ............................................................... 15 15
Carrier frequency and adjacent channel
rejection................................................................... 16 16
Wideband power flatness....................................... 17 16
Phase and residual phase jitter (option 003 only) .......... 18 17
Final procedure ...................................................... 19 18
SECTION I
IDENTIFICATION AND DESCRIPTION
1. Test Instrument Identification. This bulletin provides instructions for the
calibration of Voltmeter Frequency Selective AN/USM-490( ), and Selective Level Meter,
Hewlett-Packard, Models 3586B and 3586C w/Options 001, 003, and 004. The
manufacturer's manual was 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.
b. Time and Technique. The time required for this calibration is approximately 12
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 adjustments.
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
Bandwidth selectivity Range: 20, 400, and 3100 Hz
Accuracy: 3 dB bandwidth