MIL-HDBK-1839 Calibration and Measurement RequirementsThis information and interpretive guidance provided by this handbook are intended to clarify the requirements invoked by Mil-Std-1839. This handbook is for guidance only. this handbook cannot be cited as a requirement. If it is, the contractor does not have to comply.

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MIL-HDBK-1839A APPENDIX  B

INTRODUCTION

for the

Big Automatic Tester (BAT) CALIBRATION & MEASUREMENT REQUIREMENTS SUMMARY

(CMRS)

This CMRS identifies the Big Automatic Testers for the following configurations: PN:  ABC with options 01/02/03, NSN 6625-01-234-0099

PN:  CDE with options 02/03/04/05, NSN 6625-01-456-0099

PN:  FGH with options 02/03/04/05/06, NSN 6625-01-789-0099

However, this CMRS does not include the calibration capability to support the Phase Noise Measurement Module (PN 9500004-10) contained in the BAT model number 303C.  This module was omitted, as the technical data is proprietary and not available from the OEM.  The phase noise measurement required by this module can be calibrated through the local PMEL with the 3048MS,

phase noise measurement system.  The optimum solution regarding phase noise measurement would be to supplement the PATEC with a spectrum analyzer and low noise synthesizer for the BAT model

303C, 305 and 405 systems.  The addition of a microwave counter to the CORE PATEC would improve the calibration capability and accuracies of instruments in the RF Station.

The following instrument limitations have been incurred in the development of this CMRS.

1.   Elgar AC Power supply Model SW5250 - no technical data available from OEM.

2.   Power Meter sensors, 8481D and 8481A - recommend sensors should be calibrated by PMEL (33K4-4-184-1 and 33K4-4-35-1), not in the field.  A field calibration using PATEC can be achieved with a reduction in uncertainty to 0.5 dB.

3.   Test Uncertainty Ratio (TUR) of 1:1 can only be achieved for the DDCC37001 and the

5410C-89-1.  The current technology can improve this ratio to the recommended 4:1.  It would require the purchase of additional standards.  The estimated cost would be roughly

$18,000.

The CMRS relies on the following BAT instruments to be utilized as working standards during the calibration process.

1.   Spectrum Analyzer, HP 71209A/C

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