Sea Tel DAC-2202, Инструкция по установке и эксплуатации

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DAC-2202 Antenna Control Unit Operation
2-1
2. Operation
When power is turned ON, the ACU Display will initially show “ SEA TEL INC - MASTER ” and the ACU software version (ie
DAC-2202 VER 6.xx ). 10 seconds later, the display will switch to “ SEA TEL INC - REMOTE ” and “ INITIALIZING ” for
approximately two minutes while the Pedestal Control Unit (PCU) completes initialization of the antenna pedestal and then
reports its Model & Software version.
2.1. Quick Start Operation
If your system has been set up correctly and the ship has not moved since the system was used last. Operation of the
system from a cold start involves the following steps.
1. Turn on the AC power switches for the Antenna Control Unit (ACU) and other Below Decks Equipment..
2. Press NEXT until the Ship menu is displayed to check the Latitude, Longitude and Heading values. Latitude
and Longitude should still be correct, but may be updated if necessary. Heading, in some cases, will be 000.0
and you will have to enter the
initial
value of the ships
current
heading. Entry of ships heading is not required
when your system is connected to a 1:1 Synchro or NMEA 0183 Heading Gyro Compass output. To correct
the Heading value, press
ENTER 3 times
to select ship's heading (HDG) entry mode. Use the
LEFT
arrow to
bring the cursor up under the ones digit, then if desired, increment/decrement it using the
UP/DOWN
arrow
keys. Use the LEFT/RIGHT arrow keys to select other digits to modify and the UP/DOWN arrow key to
modify them as needed to enter the current ships gyro heading. Press ENTER to save the value. Press NEXT
to return to the Ship display menu.
3. If System Type parameter includes value 1, the ACU should automatically target the last satellite that was
used. If it does not, press
NEXT to the Satellite display menu so you can manually target the satellite. If
you are targeting the SAME satellite longitude as was used last; Press ENTER , then the LEFT (or RIGHT )
arrow and then ENTER to target the same satellite. If you are targeting a different satellite you will need to
change the tracking parameters and then target the desired satellite, refer to the operation section for the
Satellite menu below.
A. If no signal is found: The Tracking LED will flash for a short period of time (per the SEARCH DELAY parameter)
followed by the Search LED coming ON . The ACU will automatically move the antenna in a spiral SEARCH pattern
until the ACU receives a signal (AGC) value that is greater than the threshold value. Tracking will take over (Tracking
LED
ON ) and automatically peak the antenna position for highest receive signal level from the satellite which has been
acquired.
B. If satellite signal is found AND network lock is achieved:
The received signal level (AGC) will be higher
than the threshold value. Tracking will take over (Tracking LED
ON
) and automatically peak the antenna position for
highest receive signal level from the satellite and the satellite modem will get modem lock/receive sync. When the
ACU has signal above threshold AND modem has network lock the antenna will continue to track the satellite.
B. If satellite signal is found but network lock is NOT achieved: If you’re system has been setup to use the
network lock/satellite ID output from the satellite modem; When signal above threshold is found but the modem does
NOT get network lock (receive sync), the ACU will
re-target
in an attempt to find the satellite which has signal AND
network lock. This could be due to the antenna targeting the wrong satellite, polarization failure, modem failure (not
getting receive sync) or network failure (not allowing the modem to get receive sync). The ACU will continue to re-
target.
Upon completion of the above
, the system will continue to operate automatically indefinitely until; AC power to
the system is interrupted OR The satellite signal is blocked OR The ship sails into an area of insufficient satellite
signal level.
2.2. Front Panel Layout