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*TB 9-4931-488-35
DEPARTMENT OF THE ARMY TECHNICAL BULLETIN
CALIBRATION PROCEDURE FOR
SIGNAL GENERATOR, SG1112VlU,
SG1112V2U, AND MIS-28707TY2 (HEWLETT-
PACKARD, MODEL 8640B, OPTIONS 001,
002, 003, 004, AND H66)
Headquarters, Department of the Army, Washington, DC
26 August 2003
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, U.S. Army Aviation and
Missile Command, ATTN: 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 3
Calibration description ....................................... 3 3
II. EQUIPMENT REQUIREMENTS
Equipment required ............................................ 4 5
Accessories required ............................................ 5 6
III. CALIBRATION PROCESS
Preliminary instructions ..................................... 6 7
Equipment Setup ................................................ 7 7
Internal reference accuracy ................................. 8 9
Frequency range, accuracy, and stability........... 9 9
________
*This bulletin supersedes TB 9-4931-488-35 dated 11 October 1989.
TB 9-4931-488-35
Paragraph Page
Harmonic distortion ............................................. 10 10
Output level and meter accuracy (all models 11 12
except those containing option 004).................
Output level and meter accuracy (models
containing option 004)....................................... 12 21
Output level flatness............................................ 13 24
Internal modulation oscillator frequency
accuracy, output voltage and distortion .......... 14 25
AM sensitivity, accuracy, and distortion (all
models except those containing option 004) .... 15 28
AM sensitivity, accuracy, distortion, and
demodulated output (models containing
option 004) ......................................................... 16 31
AM flatness (option 004 only).............................. 17 37
FM sensitivity, accuracy, and distortion ............ 18 39
Power Supply........................................................ 19 43
Final Procedure .................................................... 20 43
SECTION I
IDENTIFICATION AND DESCRIPTION
1. Test Instrument Identification. This bulletin provides instructions for the
calibration of Signal Generator, SG1112V1U (8460BOPT004), SG1112V2U (8640BOPT001),
MIS-28707TY2 (8640BH66) and Hewlett-Packard, Model 8640B, Options 001, 002, 003,
004, and H66. 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. Option variations are as listed below in (1) through (5).
(1) Option 001 provides a modulation oscillator that is continuously adjustable from
20 Hz to 600 kHz. The oscillator can also be set for 400 Hz or 1 kHz fixed tones.
(2) Option 002 provides an internal, active frequency doubler that extends the
frequency range of the generator to 1024 MHz (to 1100 MHz with over range).
(3) Option 003 protects the generator output circuits from accidental applications of
reverse power up to 50 W.
(4) Option 004 provides a demodulated output and modified AM circuitry for setting
very accurate AM depths. It also has a 1 dB output step attenuator in addition to the
standard 10 dB output step attenuator.
(5) Option H66 which includes option 001 provides an additional control for very fine
adjustment of the output level and improved harmonic content in the RF output signal.
2
TB 9-4931-488-35
b. Time and Technique. The time required for this calibration is approximately 8
hours, using the dc and low frequency and microwave 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 specifications1
Internal reference Range: 5 MHz
Accuracy: +1 ppm
Drift: <0.05 ppm per hr
Frequency Range: 0.5 to 512 MHz
0.5 to 1024 MHz (option 002)
Accuracy: Counter resolution (