1/4-20 by 5/8 in (16 mm) bolts, lockwashers and
flatwashers with full and half thickness flange gaskets.
NOTE: Flatwashers are not required if thickness of LNA
mounting flange is 5/16 in (8 mm) or greater. Thinner
LNA flanges will require flatwashers due to four shallow
holes on feed horn flange. Full thickness flange gaskets
are utilized in conjunction with corresponding grooved
LNA flanges while half thickness gaskets are used with
flat LNA flanges or a flat plate.

3.8 Attach corresponding cables, power supply leads,
etc. to LNA's. Connect LNA output to spectrum analyzer.

3.9 Fine adjust elevation and azimuth strut lengths to
achieve maximum signal strength from desired satellite.

4.0 Polarization Adjustment
4.1 Loosen both 1/4-20 by 3/4 in (19 mm) bolts in feed
support until feed horn assembly is free to rotate and
adjust feed horn for maximum signal strength on desired
polarization. NOTE: Do not loosen collar hardware.
Collar will maintain appropriate feed window to
vertex plate dimension during polarization adjustment.

4.2 Rotate feed horn assembly in one direction until
signal level drops 1 dB. Mark this position. Rotate feed
horn in opposite direction through maximum signal until
signal level again drops 1 dB. Mark this position.

4.3 Adjust feed horn assembly to midpoint of 1 dB
marks and securely tighten 1/4-20 by 3/4 in (19 mm)
bolts in feed support making sure feed support is firmly
seated against 49683 collar.
PARTS LIST
Type No. Description Quantity
4RLPCK-45-R2 Feed Horn Assembly,
Dual-Polarized
1**
49797A Feed Support 1
300376 Feed Hardware Kit
consists of:
9963-128 3/8-16 x 1-3/4"
Hex Head Bolt		 4
9963-127 3/8-16 x 2-1/4"
Hex Head Bolt		 4
9963-75 1/4-20 x 3/4"
Hex Head Bolt		 2
200324 Template 1
9974-63 3/8" Lockwasher 34*
9999-60 3/8-16 Hex Nut 34*
9999-115 3/8-16 x 1"
Hex Head Bolt		 25*
49187 Angle Clip 8
49798 Feed Strut 4
49936-2 Vertex Plate 1
*Includes spare(s).
*Patented: U.S. 3553707, Canada 873547,
U.K. 1199226, Australia 417525.
ADDITIONAL ITEMS
Type No. Description Quantity
49940 Feed Flange Hardware Kit,
consists of:
9963-134 1/4-20 x 5/8"
Hex Head Bolt		 22*
9974-15 1/4" Lockwasher 22*
9997-42 1/4" Flatwasher 22*
31619 Full Gasket 3*
31619-2 Half Gasket 3*
*Includes spare(s).
ANDREWNU
Andrew
Corporation 		Telephone:
708-349-3300 		Customer Service, 24 hours: U.S.A. * Canada *
Mexico: 1-800-255-1479
10500 West
153rd Street 		FAX (U.S.A.)
1-800-349-5444 		U.K. 0800 250055 * Republic of Ireland:
1 800 535358
Orland Park, IL
U.S.A. 60462 		Internet:
http://www.andrew.com 		Other Europe: +44 1592 782612
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