Andrew 3.7-Meter Earth Station Antenna - Manual (Page 51)

Alignment Test
Step 1
Step 2
Step 3
Step 4
51
Installation Procedures
Reposition the first string above the second string to check the accuracy of the first test.
NOTE: The reflector should be facing downward when the string test is performed. The
person that is positioned under the dish should ensure that the strings are aligned cor-
rectly during the test.
You have completed the assembly of the reflector. Proceed to the next page for instruc-
tions on the enclosure assembly.
Figure 3-37: Reflector Alignment
As a final test of proper reflector alignment, Andrew recommends that a string test be
performed. The following steps provide the procedure for the string test.
Attach a string at the twelve o’clock position of the reflector stretching to the six o’clock
position of the reflector.
Attach a second string at the three o’clock position stretching to the nine o’clock position.
Verify its intersection to the first string as shown in Figure 3-37. If the strings touch, then
the reflector has been correctly aligned. If they do not touch, then check all previous
steps to ensure proper assembly before continuing.
NOTE: A 1/16 inch gap is permitted.