AEROGRAPHER'S MATE 3 & 2 



© 



CORRECT TUNING 



-2) (£ 



?RECT TUNING INCORRECT TUNIf 



Figure 7-16. — Scope patterns of correct and incorrect tuning on converter oscilloscope,, 



209.341 



209.437 



Figure 7-17. — COMEDS circuit areas. 



to the stated needs of your office. This is ac- FAA CIRCUITS 



complished by use of the Carswell message 



build capability in conjunction with the selective 



addressing and printout capability of the system. 



This selective capability also permits your office 



to predetermine which data will be delivered to 



your forecaster and observer printer terminals. 



The Federal Aviation Administration (FAA) 

 is responsible for establishing, operating, and 

 maintaining communications systems and cir- 

 cuits required for the collection and dissemi- 

 nation of meteorological information utilized by 



138 



