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3
rd
Generation Rack-
Mount RDMS™
69
Quasonix, Inc.
4.4.2.20.1 AFC Mode
–
Off
The AFC Mode Off setting is shown in Figure 103. In this mode, the AFC continuously provides zero
compensation. This mode is best suited for small frequency offsets that are within the amount of frequency offset
that the demodulator can natively tolerate. In general, Quasonix recommends setting the AFC Mode to Off.
Figure 103: Advanced Menu, AFC Mode
–
Off
4.4.2.20.2 AFC Mode
–
Track
When AFC Mode is set to Track, as shown in Figure 104, the AFC continuously attempts to estimate and
compensate for the input frequency offset unless the input Eb/N0 falls below a predefined threshold. This mode is
best suited for dynamic frequency offsets.
Figure 104: Advanced Menu, AFC Mode
–
Track
4.4.2.20.3 AFC Mode
–
Hold
When AFC Mode is set to Hold, as shown in Figure 105, the AFC holds its current compensation. This mode is best
suited for static frequency offsets. It may be advantageous relative to the Acquire mode if the channel is initially
“known good” but may become impaired during a mission.
Содержание RDMS
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