User's Guide

9
To decrease sensitivity, the user will strike the ‘d’ key until the desired response is seen. The ‘d’
key has the effect of increasing the DAC value by 1 LSB each time the key is struck.
To leave this mode and return to the main menu, the user must press the escape key. When the
Escape key is hit, the following message will appear on the terminal indicating that the user
should enter one of the menu items:
Try Again
The display seen on the terminal in Figure 10 is in Packed Binary Target Format which is
described in APPENDIX B - PACKED BINARY TARGET RETURN FORMAT.
Figure 10 - Terminal Screen After Entering Repeat Remote Mode
Fixed Remote Mode Menu Item
To enter the Fixed Remote Mode, the user enters an ‘f’ at the terminal’s keyboard in the main
menu. The Fixed Remote Mode allows the user to make decisions on where a target may be
based on a summation of five returns each at different sensitivity levels. When the SPIDER-650
enters Fixed Remote Mode, the user will see a terminal similar to what is shown in Figure 11.
The ASCII data seen at the terminal is in Packed BCD Target Return Format, which is described
in APPENDIX C - PACKED BCD TARGET RETURN FORMAT.