Andrew Type 183 Assembly Instructions Manual - Page 11

Browse online or download pdf Assembly Instructions Manual for Antenna Andrew Type 183. Andrew Type 183 20 pages. 1.8 meter transmit receive antenna system

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Azimuth

Use Azimuth Chart on page 13 and

determine your azimuth setting. Values

in chart must be adjusted for magnetic

deviation for your location for correct

compass reading.

Equally tighten the six azimuth

locking bolts until snug. This will

allow the reflector to rotate with slight

resistance.

Rotate reflector and mount, pointing to

the compass reading for your location.

Slowly sweep the reflector in azimuth

until signal is found. If desired signal is

not found, increase or decrease

elevation setting and repeat the

azimuth sweep. Tighten locking bolts.

Fine Tuning

Progressively tighten and torque azimuth locking bolts to 100-115 N-m (75-85 ft-lb). The four top plate locking bolts are

pre-torqued to 11-15 N-m (8-11 ft-lb). Maintain this torque until after azimuth is fine tuned.

Use a signal strength measuring device for final adjustments to obtain maximum antenna performance. Alternate between

elevation and azimuth fine tuning to reach maximum signal strength, until no improvement can be detected. Gradually tighten

(1/8 turn increments max.) top plate bolts in sequence 1st, 2nd, 3rd and 4th to 100 N-m (75 ft-lb). Observe for maximum

signal strength as elevation screws M22 locking nuts are tightened.

Polarization tune may be checked by slowly rotating feed assembly in clamp. When maximum signal strength is found,

gradually tighten clamp bolts. If a signal on the opposite polarity is available, this signal should be minimized.

Tighten and torque all hardware. Refer to Torque Chart on Page 3.

Example Depicts Azimuth Heading To 171˚

(Azimuth ± Magnetic Deviation)

1st

Top Plate

Locking

Bolt

(4 Places)

Top Plate

Pivot Bolt

Rotate Antenna

On Ground Tube

Azimuth

Adjustment

Screw

4th

3rd

2nd

Turn Nuts

Clockwise

or Counter

Clockwise For

Azimuth Fine

Tuning

Azimuth

Locking Bolts

(6 Places)

Compass