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RC4000 ACU Boardset
Chapter 3
Software
The value of the predefined horizontal and vertical positions depends on what mode was active prior to
entering the MANUAL mode. If a LOCATE operation occurred prior to MANUAL, the H and V values will
be those automatically calculated by the LOCATE mode. Otherwise H and V depend on whether or not
satellites have been STOREd. If MANUAL was entered following a RECALL operation, H and V will be
those stored for the RECALLed satellite. If multiple satellites have been STOREd, H and V will
correspond to the values for the closest (in terms of azimuth location) STOREd satellite. If no satellites
have been STOREd, H and V will be defined according to the reference defined in the POL
CALIBRATION screen (ie. if REF = H, H = 0 & V = 90 if REF = V, V = 0 & H = 90).
The polarization axis may be moved manually by pressing the Pol CCW or Pol CW keys. The axis may
also be moved automatically to the predefined horizontal or vertical positions by pressing the H or V keys.
In the MANUAL mode, whenever the "5 H/V" key is pressed the polarization axis will automatically move
90 degrees from its current position. The target position for this automatic "cross polarization" movement
takes into account the user defined polarization axis limits. For example, if a cross polarization movement
of 90 degrees clockwise will move the axis beyond the clockwise limit, the movement will be achieved by
moving 90 degrees counter-clockwise.
SS1/SS2/RF:
This field shows the current signal strength sensed on the selected signal strength channel. By pressing
the "Scroll Dn RF/SS" key the source of signal strength will rotate between signal strength channel 1
(SS1), signal strength channel 2 (SS2) and the RF autopeak input (RF).
The current signal strength will be displayed as a value between 0 and 999. If the selected signal source
is saturated (value greater than 999), *** will be displayed.
If a signal lock input has been enabled associated with RF, SS1 or SS2, an "L" will be displayed to the
right of the signal strength value whenever the signal lock condition has been satisfied.
SPD:
This field shows the selected drive speed. The speed may be toggled between FAST and SLOW by
pressing the Speed key.
TIME DISPLAY
MANUAL mode will display the reference time (4.3.2) and time zone in the lower right hand corner.
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