Sea Tel DAC-2202, Инструкция по установке и эксплуатации

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Operation DAC-2202 Antenna Control Unit
2-6
2.6.2. Satellite Information Menus.
Display Meaning
SAT 101 W THRS 1234
FREQ 1100 NID 1234
Press the
NEXT
key until the main
Satellite
menu is displayed. This is the display of
the current Satellite tracking information.
NID value displayed is the Network ID which is currently being received from the
satellite that the antenna is pointed to. If your ACU has an L-Band SCPC receiver in it,
“ABCD” will be displayed here. If your ACU has an L-Band NBIF receiver in it, “1234”
will be displayed here. If your ACU has a 70, or 140, MHz SCPC narrow band receiver
in it, 0000 will always be shown.
SAT 101.0 W
Press ENTER to access the Satellite Longitude sub-menu . Satellite longitude is
used to calculate antenna Elevation, Azimuth and Polarity pointing angles from the
ships current location and heading.
To manually update, press the LEFT or RIGHT arrow key to bring the cursor up
under the tenths digit to the left, or the E/W character to the right respectively.
Continue to move the cursor until the desired character to be edited is underscored
(selected). Use the
UP or DOWN arrow keys to increment or decrement the selected
character.
Range of acceptable latitude values is 000.0 East to 180.0 East/West to 000.0 West,
however longitude may be entered as 000.0-359.9 East if you prefer (181.0 East is
the same as 179.0 West). Tenths may be entered (and will be used internally) but the
display will round off to nearest whole degree.
When the hemisphere character is selected press the UP or the DOWN key to toggle
E ast/ W est hemisphere.
Press ENTER to target the displayed satellite position OR Press NEXT to abort and
return to the main Satellite menu.
THRS 1234
Press DOWN or ENTER to access the Threshold sub-menu . Threshold is a
minimum AGC value for the ACU to determine if satellite signal has been located or
has been lost.
Default setup is Automatic Threshold, which sets the Threshold value to nnnn counts
of AGC above the average off satellite AGC value whenever the ACU Searches,
Targets or Unwraps (refer to your antenna manual for the default setting for AUTO
THRES parameter).
To manually set threshold; Note the Peak “on satellite” AGC value, move AZ or EL and
note the “off satellite” (Noise Floor) AGC value. Calculate the difference between
Peak AGC and Noise Floor AGC. Threshold should be set to 1/3 (to ½) of the
Difference above Noise Floor.