Comtech EF Data SDR-54A - Manual (Page 57)

Chapter 7. Fully Accessible
System Topology (FAST)
This appendix describes the Fully Accessible System Topology (FAST) option available
for the demodulator.
7.1 FAST Accessible Options
Comtech EF Data’s FAST system allows immediate implementation of different options
through the user interface keypad. Some FAST options are available through the basic
platform unit, while others require that the unit is equipped with optional hardware, or
that the hardware be installed in the field.
The options available through the FAST architecture include:
• Variable Data Rates
Other options are available through conventional changes, such as installing daughter
card PCBs. Refer to Section D.2, Conventional Options, for additional information.
7.2 FAST System Theory
FAST is an enhancement feature available only in Comtech EF Data products, enabling
on-location upgrade of the operating feature set—in the rack—without removing a
modem from the setup. When service requirements change, the operator can upgrade the
topology of the modem to meet those requirements within minutes after confirmation by
Comtech Ef Data. This accelerated upgrade can be accomplished only because of FAST’s
extensive use of programmable devices incorporating Comtech Ef Data-proprietary signal
processing techniques. These techniques allow the use of a unique access code to enable
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