Validation of the Cosite Analysis Model (COSAM) for Selected VHF FM Equipments

reportActive / Technical Report | Accession Number: AD0912583 | Open PDF

Abstract:

Measurements were made of numerous interactions at a typical cosite installation results were compared with predictions made by the Cosite Analysis Model COSAM developed by the D0D Electromagnetic Compatibility Analysis Center ECAC. Tests involved six FM voice communications transceivers operating in the 30-76 MHz VHF range. Twenty-five frequency assignments were tested, with several desired signal levels. Types of interactions included adjacent signals, spurious responses, spurious emissions, receiver and transmitter intermodulation 2 and 3-signal mixes 2nd, 3rd, 5th and 7th orders. Results show that model accuracy is adequate for predicting the operational performance of collocated VHF-FM tactical communications equipment. Confidence levels are presented.

Author(s):
Hughes, D. J. ; Lustgarten, M. N.
Author Organization(s):
IIT RESEARCH INST ANNAPOLIS MD
Descriptive Note:
Technical rept.
Supplementary Note:
DOI: 10.21236/AD0912583
Pagination:
0191

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release, Document Partially Illegible
Distribution Statement:
Availability: Document Partially Illegible.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
ESD-TR-73-016
Contract/Grant Number(s):
F19628-73-C-0031
Project Number(s):
AF-649E
Monitor Series:
TR-73-016, ESD
 Subject Terms
Joint Capability Areas:
JCA_5_Command and Control; JCA_5.3_Planning; JCA_4.3_Maintain; JCA_5.5.1_Communicate Intent and Guidance; JCA_5.5_Direct; JCA_4.2_Supply; JCA_5.6.4_Assess Guidance; JCA_5.6_Monitor; JCA_4.2.2_Inventory Management
Modernization Areas:
Microelectronics
Communities of Interest:
Energy and Power Technologies
Descriptor(s):
*COMMUNICATION EQUIPMENT, *RADIOFREQUENCY INTERFERENCE, *TRANSMITTER RECEIVERS, *ELECTROMAGNETIC COMPATIBILITY, *SPECTRUM SIGNATURES, TRANSIENTS, INTERACTIONS, FREQUENCY MODULATION, MATHEMATICAL PREDICTION, VERY HIGH FREQUENCY, VOICE COMMUNICATIONS
Field(s)/Group(s):
Radiofrequency Wave Propagation, Radio Communications
Keyword(s):
AN GRC 163, AN PRC 25, AN PRC 77, AN VRC 12, AN VRC 49, FREQUENCY ASSIGNMENT, INTERMODULATION, SPURIOUS EMISSIONS
Report Date:
1973 Jul 01