Sea Tel 9497B-1, Инструкция по установке и эксплуатации

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Setup 9497B-1 C/Ku-Band TVRO
5-4
Figure 5-3 Antenna stops past the Bow
have to drive). Refer, in general terms, to the Optimizing Targeting procedure.
If the antenna stopped before it got to the bow-line; When you initially target a satellite, the
antenna will also stop prior to the satellite position, so you that will have to drive the Azimuth of the
antenna UP to actually find the satellite. Using the same basic procedure as in the Optimizing
Targeting paragraph, target the satellite and record the “Calculated” Azimuth position that the
antenna was driven to. Drive UP until you find the satellite, positively identify that you are on
the
satellite
you targeted and allow tracking to peak the antenna position. Record the “Peak” Azimuth
position. Subtract the “Peak” position from the “Calculated” position to determine the number of
degrees of AZ TRIM that would be required.
Example:
In this new installation, I target my desired satellite and record the Calculated Azimuth to
be 180.5. I drive UP and finally find my desired satellite at a Peak Azimuth of 227.0 degrees. I
subtract Peak from Calculated and difference to be –46.5 degrees, therefore the actual Relative
position that needs to be preset into the counter when the antenna is at the Home Flag is 313.5.
HFO = ((360-46.5) / 360)) x 255 = (313.5 / 360) x 255 = 0.87 x 255 = 222.06 which I round down to
222.
If the antenna went past the bow-line; When you initially target a satellite, the antenna will also go
past the satellite position, so that you will have to drive the Azimuth of the antenna DOWN to
actually find the satellite. Using the
same basic procedure as in the
Optimizing Targeting paragraph,
target the satellite and record the
“Calculated” Azimuth position that
the antenna was driven to. Drive
DOWN until you find the satellite,
positively identify that you are on
the satellite
you targeted and
allow tracking to peak the antenna
position. Record the “Peak”
Azimuth position. Subtract the
“Peak” position from the
“Calculated” position to determine
the number of degrees of AZ TRIM
that would be required. . Refer to
the calculations above to determine
the HFO you should use for this
antenna.
Example:
In this new installation, I
target my desired satellite and
record the Calculated Azimuth to be 180.0. I drive DOWN and finally find my desired satellite at a
Peak Azimuth of 90.0 degrees. I subtract Peak from Calculated and difference to be +90.0 degrees,
therefore the actual Relative position that needs to be preset into the counter when the antenna is
at the Home Flag is 90.0. HFO = ((90.0) / 360)) x 255 = 0.25 x 255 = 63.75 which I round up to 64.
5.4.2.
To enter the calculated HFO value, press & 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.
To Enter the HFO value:
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/DONW 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 save yet).
If you want to find out what the
current
HFO value is key in N6
999
and hit
ENTER.