3-2 Theory of Operation:
•Keypad
- Standard Control (M1.5) Keypad version has 3 soft keys
- Limited Keypad Version has 3 soft keys, 4 direction Navigation key, Home and Data but-
tons
- Full Keypad Version has 3 soft keys, 4 direction Navigation key, 3x4 alphanumeric keypad,
Home and Data buttons.
Figure 3-1. APX 1000 Overall Block Diagram
RF Antenna
Main Board
Keypad
External Accessory
Connector
Controls Top
Front Display
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