User`s guide

Glossary
MS-4900, Rev. A G-5
volatile memory
Segment of processor memory that is lost when power is turned off or
interrupted. In the IDR V1000, certain commands or settings, such as those
used to perform a real-time function or enter a test mode, are temporarily
stored in volatile memory. (Configuration parameters are not volatile; they
remain in memory even if receiver power is turned off.)
Viterbi
a standard method of forward error correction decoding that is applied by the
IDR V1000 to all data received.