Sea Tel DAC-2202, Installation And Operation Manual

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Operation DAC-2202 Antenna Control Unit
2-12
STATUS
ERROR LLLL RRRR
Press
DOWN
or
ENTER
to access the
Status – Error
menu. This is a display of
errors that have been detected by the system
LLLL - Comms Error Count - The first four numeric digits indicates the
number of times that a Pedestal M&C communication message (between the ACU
and PCU) was not received correctly. Occasional counts are acceptable but more
than 10 per minute indicates a problem that needs attention (refer to
Troubleshooting section).
RRRR
-
Error Code
- The second set of four numeric digits indicates the SUM
of the discrete error(s) that have occurred. It does not indicate how many of a
particular error have occurred.
128 Satellite Out Of Range
16 DishScan Pulse Error
8 Pedestal Error (
NOTE: An error code 8 requires an additional PCU Query to
determine fault type, refer to the maintenance section of this manual for further information
4 ACU-PCU Communication Failure
2 Wrong Synchro Converter Type
1 Gyro Read Error
Refer to the Maintenance section of this manual for troubleshooting frequent or
constant errors.
Pressing UP arrow key and then the ENTER key clears error count, status code and
extinguishes the Error LED. Refer to troubleshooting section of manual if error
does not clear.
STATUS
REMOTE AUX 0000
Press DOWN or ENTER to access the Status – Remote Aux menu. Diagnostic
display of Remote auxiliary read. Typically, this display is to indicate Temperature
or EIRP readings from the antenna, if properly configured to do so; otherwise, there
are no operational or diagnostic uses of this sub-menu.
2.6.5. SETUP Parameter display and entry menus.
Access to system setup parameters is only required during installation or repair of your antenna system.
These parameters should only be changed by an authorized service technician.
CAUTION : Improper setting(s) of these parameters can and will cause your system not to perform
properly.
Refer to the SETUP information in the Installation section of this manual.
2.7. Tracking Operation
Tracking, which is controlled by the ACU, is fine pointing angle adjustments to the antenna pedestal to maximize the
level of the satellite signal being received. You can, as described in the Status Information Menu’s section of this
manual, toggle Tracking ON or OFF by pressing the
Track
key regardless of what current menu or sub-menu is being
displayed.
2.7.1. DishScan Operation
To control tracking this system uses a variation of Conical scanning, called DishScan, which continuously
drives the antenna in a
very small diameter circle (defined by DishScan Amplitude) at 60 RPM. This circle is
defined in 4 “quadrants”, UP, DOWN, LEFT, and RIGHT (by the DishScan Phase). The received signal is
evaluated throughout each full circle rotation of the antenna, by referencing timing pulses issued by the PCU
in each of the 4 quadrants (defined by DishScan Phase), to determine where the strongest signal level is and
will issue the appropriate Azimuth and/or Elevation steps to the antenna, as needed, 60 times per minute
towards that quadrant. Both DishScan Phase timing mark and Amplitude drive are adjustable by the N7xxxx
Remote Command parameter. For more information on this parameters refer to Sea Tel document 123400.
While viewing the AZIMUTH or ELEVATION sub-menu, the DishScan drive commands issued (2, 4, 6 or 8) will
be visible in the lower left corner of the display. Each 2 you see flash is a command sent to step Elevation
down, each 4 is a command sent to step down in Azimuth (CCW), each 6 is a command sent to step up in
Azimuth (CW), each 8 is a command sent to step Elevation up.