Service manual

STP 11-25R13-SM-TG
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Performance Steps
(2) Rotate the polarizer to properly align the feed to the latitude of the installation.
(3) Attach the LNB to the rear of the polarizer.
NOTE: If the system is a (commercial) C/Ku band feed, the waveguides that the LNBs attach to are
different in size to allow for transmission of either 4 GHz or 12 GHz signals. Thus, the C-band LNB can
mount to only one waveguide and the Ku LNB to the other (there is no UP or DOWN with the LNBs).
(4) Use a measuring tape to properly set the focal distance of the feedhorn according to the
measurement distance found in the manufacturer's manual.
( a) Measure from the absolute center of the dish to the front of the polarizer.
( b) Adjust the distance according to dish instructions, +/- 0.25 inch will not drastically
alter the performance.
b. Preset dish angles.
(1) Set the elevation bar to the site latitude for close placement of this measurement.
(2) Set the declination by pushing the dish up over the top of the mount, parallel to the
elevation bar.
(3) Place an angle finder along the backside of the dish and set the declination.
NOTE: The measurement will be the sum of the elevation angle of the elevation bar and the declination
angle for your site. The dish tilts out over the elevation bar, thus giving an accurate declination
measurement.
c. Attach the actuator.
NOTE: A listing of satellite coordinates describes how the arc forms at your location and tells you what
direction the dish needs to travel in to see the satellites. Knowing the direction tells you whether the
actuator needs to be on the right side of the dish or the left.
(1) Attach an accordion boot over the actuator end where the piston attaches to the dish. The
other end of the boot attaches to the outer tube just ahead of where it attaches to the
clamp.
NOTE: The accordion boot protects the actuator from moisture seeping into it from the end. It is a good
idea but not necessary to add an additional boot over the motor housing of the actuator as well.
(2) Mount the clamp to the actuator and leave it loose. Attach the other end of the clamp to
the location on the dish mount where the actuator clamp is to attach. Attach the piston
end of the actuator to the rear of the dish where the actuator attaches. Move the dish out
away from the mount, sliding the tube through the clamp, to a point where it appears that it
is just beneath the lowest look angle it needs to be.
d. Connect the color-coded wires to the receiver and the motor drive, LNB(s), and feedhorn.
CAUTION: During the preparation of the coax ends, do not accidentally leave any of the outer shielding in
a location to short against the center conductor.
e. Weather seal all connections in the actuator housing.
5. Align and track the TVRO.
a. Take a TV and the satellite receiver to the dish and connect the dish to the receiver and the
receiver to the TV.
b. Search for the lowest satellite in the sky.
(1) Select an active channel on the receiver.
(2) Orient the dish roughly in the direction of the satellite and rotate the dish left and right. If
there is nothing, move the actuator up a little and rotate the dish again.
c. Make the lowest satellite as clear as possible.
(1) Adjust SKEW to clear sparkles caused by the receiver.
(2) Move the actuator out slightly and rotate the dish. If it gets better, move the actuator out a
little farther and rotate the dish. If the pictures do not get better going out with actuator, try
moving it in slightly and rotate. Try both directions just to be certain.
(3) Lightly tighten the mount collar bolts.
(4) Drive the dish out to the last observable satellite. If the dish falls out of tracking, then the
last satellite will appear sparkly.
(5) Increase or decrease the elevation bar of the dish. One way ruins the picture completely
while the other way makes it clear, barring obstructions.
(6) Once clear, tighten the elevation adjustment nuts and return to the lowest satellite.