RC3000 Antenna Controller | Chapter 3 | Detailed Operation |
SCAN_TH: | SCAN THRESHOLD |
This threshold item defines what the minimum signal strength indication is required for the scan
procedure to recognize that a satellite is present.
The definition of this value is different depending on whether the
When using SS1 or SS2 as the autopeak signal source, the threshold value refers to the absolute value above which the scan procedure should recognize that a satellite is present. Per the signal strength adjustment calibration procedure (2.4.3.2), SS1 or SS2 channels should be tuned such that a value of approximately 50 is displayed when the antenna is completely off of a satellite (open sky) and a value of approximately 650 is displayed when the antenna is peaked up on a satellite. When using SS1 or SS2, a threshold value of 200 would typically be appropriate.
When using the RF
When using either type of input as the autopeak signal source, the characteristics of the displayed value should be observed as the scan procedure moves across a satellite. If the threshold value is too low, the scan procedure may incorrectly recognize a random spike in the noise floor as an indication of a satellite. Conversely, if the threshold value is too high, the scan procedure may not recognize the presence of a satellite.
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