AEROGRAPHER'S MATE 3 & 2 



The controls are shown in figure 5-21 and 

 perform the following functions: 



1. POWER switch. Switches ac power to 

 unit. 



2. RUNWAY LIGHT SETTING selector. Se- 

 lects applicable RVR curves or places equipment 

 in NORMAL OPERATE condition. 



3. DAY-NIGHT selector. Places equipment 

 in DAY, NIGHT, or NORMAL. 



4. MODE selector. Places equipment in 

 NORMAL OPERATE condition or in one of 

 three test conditions. 



5. LS3, LS4, and LS5 indicators. Illuminated 

 indicator identifies RVR curve in use. 



6. NIGHT indicator and DAY indicator. 

 Illuminated indicator identifies RVR curve in 

 use. 



To observe proper operation of the Con- 

 verter-Indicator Group the transmissometer 

 must be turned ON. All control switches on 

 the converter should be set to NORMAL position. 

 With the power switch in the ON position, 

 check the fan in the back of the unit to make 

 sure that it is running and the filter is not 

 touching the blade. The remotely selected light 

 setting on the front panel (selected at the runway 

 or tower) should be indicated by the appropriate 

 light indicators, after the appropriate control 

 settings as presented in the OPERATORS 

 MANUAL have been set. 



DIGITAL DISPLAY INDICATOR, ID-1939/ 

 GMQ-10. — The Digital Display Indicator can 

 be rack-mounted or placed on a desk top for 

 convenience of the observer. It is also com- 

 pletely enclosed for protection against foreign 

 objects. All controls are located on the front 

 panel. Interconnection of the converter and 

 display made in the rear. The front panel con- 

 trols are shown in figure 5-21 and perform the 

 following functions: 



1. ON-OFF TEST switch. Applies ac power 

 to unit in TEST position or in ON position 

 when RVR converter is turned on. 



2. TEST or RUNWAY LIGHTS OFF indicator. 

 Illuminated indicator informs operator that 

 equipment is either in a test condition or 

 that no RVR curve for runway lighting has 

 been selected. 



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209.389 

 Figure 5-22. — Example of combination instal- 

 lation of Transmissometer AN/GMQ-10, RVR 

 Converter-Indicator Group OA-7900A/GMQ-10, 

 and Cloud Height Set Recorder RO-121/GMQ-13. 



100 



