Revision 4 - December 17,1998 Ryan TCAD 9900 Series Page 3-8
3.9 PROGRAMMING
When completing an installation, the factory settings should be checked, and the
programming functions should be used to adjust the settings as necessary (see Factory
Settings Paragraph 1.4). The following paragraphs describe the programming functions.
To engage a programming function, the appropriate button is pressed twice. When this is
done, the current setting is displayed. The s and t buttons can be used to adjust the
displayed parameter. To select the next parameter, the appropriate button is pressed
again. When each parameter has been considered, TCAD returns to collision alert
operation. In all cases, if no button is pressed for about 8 seconds when in a programming
mode, the TCAD will return to collision alert operation.
3.10 SETTING THE SHIELD SIZE (9900A and 9900B)
Depress the selected button (TRML, STD, or ENRT) twice. The shield height in
hundreds of feet will be displayed. To change the height, press the s or t buttons.
Depress the selected button again for shield radius adjustment. Depress the mode button
once more to return TCAD to normal operation.
3.11 SETTING DENSITY ALTITUDE
Press the TRML and DATA buttons simultaneously. The previously programmed
temperature will be displayed on the right. Use the s and t buttons to set the actual
outside air temperature and read the Density Altitude on the left.
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