M2 Antenna Systems 2MCP8A, Руководство пользователя

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9. NOTE: INSTALLATION OF THE VERTICAL DRIVEN ELEMENT BLOCK DETERMINES THE
CIRCULARITY OF THIS ANTENNA. THE ORIENTATION OF THE BLOCK FOR RHC - RIGHT
HAND CIRCULARITY - IS SHOWN ON THE DIMENSION SHEET AND HDWE. DRAWING.
Viewed from the rear of the boom (rearmost Reflector HORIZONTAL), the VERTICAL Driven
Element Block mounts to the LEFT hand side of the boom with the two Balun connectors oriented
to the BACK. Secure with 8 - 32 x 1 - 1/4” screw. Install the Shorting Bars as in step #6. For Left
Hand Circularity, mount the Vertical driven element block to the opposite side of the boom, balun
connectors to BACK.
10. Attach Baluns and Phasing lines to the Driven Element Blocks and Junction Block as shown in the
picture. Depending on model and polarity, the Vertical balun may loop around another element.
This is normal. Coil rear balun if single loop overhangs rear of boom. Form balun and phasing line
coax close to the boom and secure with nylon cable ties. Ties should be snug but not crushing or
kinking the coax. Tighten the connectors gently using a 7/16" end wrench.
11. Use good quality coax and “N” connector for your feed line. Secure feed coax near connector on
Junction Block, to provide stress relief, route to rear of boom, and secure again. Allow about 60” of
coax to hang in a loop between the rear end of the boom and the reattachment point (at least 12”
beyond element tips) on the mast or cross boom. Do not route feed line to boom to mast plate
as exiting antenna here will adversely affect circular field.
12. The boom to mast plate is normally mounted to the boom at the balance point (with feed line
attached). Use two 1" U - bolts and the stainless nuts and lock washers provided. DO NOT OVER
TIGHTEN. 2” U - bolts are provided for mounting the antenna to your NON - CONDUCTIVE 2” mast
or cross boom.
INSTALLATION TIPS
13. The 2MCP8A is a circular polarized antenna and creates a field in all planes or polarities.
Performance DETERIORATES SIGNIFICANTLY if it is mounted on a metal (conductive) mast or
cross boom. A 2” mast or cross boom of any NON - CONDUCTIVE material can be used.
Fiberglass is the prime choice for its strength and weather resistance. Mount the 2M14CP so that
element tips are at least 12” from any conductive material (mast, tower, feed line, etc.).
2MCP8A ASSEMBLY MANUAL
DRIVEN ELEMENT
ASSEMBLY
1/4 λ PHASING
CABLE
1/2 λ BALUN
JUNCTION
BLOCK
1/4 λ PHASING
CABLE
1/2 λ BALUN
DRIVEN ELEMENT
ASSEMBLY
REAR OF ANTENNA
FRONT OF ANTENNA
FEED
CONNECTOR