Andrew 3.7-Meter Earth Station Antenna manual Alignment Test Step

Alignment Test

Step 1

Step 2

Step 3

Step 4

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.

Figure 3-37: Reflector Alignment

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.

51 Installation Procedures