Comtech EF Data KST-2000L, Инструкция по установке и эксплуатации

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Satellite Terminal System Revision 2
Operation MN/KST2000L.IOM
4–10
-50 -45
-40
-35 -30
-25 -20
Allowed IF Input Power Range,
dBm
Allowed Up Converter
Attenuation, dB (UCA)
SSPA Power Saturation
Boundary
Figure 4-6. AGC Operating Region
4.5.3 Manual Gain Operation
With AGC disabled, the closed loop control of the uplink path is disabled. The SSPA
saturation, INSUFFICIENT INPUT POWER, EXCESSIVE INPUT POWER, and LOOP
faults are not monitored or reported as faults. The status of the AGS_fault is displayed as
OK. In this mode, the system gain is not accurately defined as in the AGC mode, because
the accuracy of the up converter’s programmable attenuator and the static gains of the up-
link amplifiers determine the gain.
When this mode is selected, UCA will display as an integer (with no decimal point), and
the allowed range of the UCA is 0 to 55 dB in 1 dB steps. The accuracy of the attenuator
is not guaranteed and degrades at high values.