Sea Tel 4009-9 BROADBAND-AT-SEA, Руководство по установке

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Setup – Home Flag Offset 4009-9 Installation Manual
9-3
Figure 9-3 Antenna stops past the Bow
9.1.3. You Observe “Home” Pointing is RIGHT of the Bow-line:
1. In this example, I observe that
the Home position is past the
bow line.
2. I estimate that it is about 90
degrees.
3. I target my desired satellite and
record the Calculated Azimuth to
be 180.0.
4. I drive DOWN (I estimated that I
will need to go
DOWN about 89
degrees) and finally find my
desired satellite.
5. Turn tracking ON to let the ACU
peak the signal up. When
peaked, the Azimuth is 90.0
degrees.
6. I subtract Calculated from Peak
(180.0 – 90.0 = 90.0) and
difference is 90.0 degrees.
7. I can calculate what the correct value for the Home position of the antenna by adding (because
“home” was to the right of bow) this difference of 09.0 to the bow line position 000.0.
Therefore “home” should be 90.0 Relative.
8. I now calculate the HFO = = ((90.0) / 360)) x 255 = 0.25 x 255 = 63.75 which I round off to 64.
9. I set, and Save, HFO to 222 using the “To Enter the HFO value” procedure below. After I re-
initialize the relative position of the antenna is now calibrated.
10. If there is a small amount of error remaining, I will use AZ TRIM in the Optimizing Targeting
procedure to correct it.
9.1.4. To Enter the HFO value in the DAC_2202:
To enter the calculated HFO value, press and hold both LEFT and RIGHT arrows for six seconds to enter
the parameter menu at the EL TRIM parameter window. Press DOWN arrow key numerous times (about
21) until you have selected the REMOTE COMMAND window.
In the REMOTE COMMAND window, press the LEFT arrow key until you have underscored the left most
character in the displayed value (ie the A in "A0000"). Use the UP/DOWN arrow keys to
increment/decrement the underscored character until it is upper case
N (“N0000” should appear in the
command window). Press the RIGHT arrow key to move the cursor under the most significant digit, then
use the UP arrow key to increment it to a value of 6 (the display is now “N6000”). Set the three digits to
the right of the 6 to the three digit HFO value from 000 to 255 (corresponding to 0 to 360 degrees) that
you calculated above. Use the LEFT/RIGHT keys to underscore the desired digit(s) then use the
UP/DOWN arrow keys to increment/decrement the underscored value. When you have finished editing
the display value, press ENTER to send the HFO value command to the PCU (but it is not saved yet).
If you want to find out what the current HFO value is key in N6
999 and hit ENTER.
When completed, you must save the desired HFO value. Press ENTER several times to select the
REMOTE PARAMETERS display. Press the LEFT or RIGHT arrow key to enter writing mode and then
press the ENTER to save the HFO value in the PCUs NVRAM.
EXAMPLE: In the “You Observe “Home” Pointing is LEFT of the Bow-line” example above, the HFO
calculated was 222. To enter this value:
1. Set the Remote Command value to " N6222 ".
2. Press ENTER to send this HFO to the PCU. The display should now show "N0222".