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4.1
Initialization
1022410– 0001 Rev. 2
Operational states
The UMOD operational states are:
•
Initialization
•
System diagnostics
•
Signal acquisition
•
Tracking
•
Fade
•
Idle
The following sections describe the operational states.
At startup (or after a reset), the modem initializes—prepares for
operation—the following UMOD hardware components:
•
Terminal interface (M&C port)
•
Front panel interface and LEDs
•
Multidrop link (CIM ports P2 and P3)
•
Microprocessor memory
•
Modulator
•
Encoder
•
Demodulator
•
Decoder
•
Frequency synthesizers
•
Terrestrial data interface daughtercard (DIM or GIM)
•
Optional IFU
•
Clock timing generators
•
Terrestrial data interface
Chapter 4
Operational states 4–1
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