M2 Antenna Systems 403CP20 Manuel utilisateur

M2 Antenna Systems, Inc. 4402 N. Selland Ave. Fresno, CA 93722

Tel: (559) 432-8873 Fax: (559) 432-3059 Web: www.m2inc.com

Rev.00

Model ........................................ 403CP20

Frequency Range ...................... 398 To 408 MHz

*Gain .......................................... 14 dBic

Front to back .............................. 16 dB Typical

Elipticity...................................... <3dB

Feed type ................................... “T” Match

Feed Impedance. ....................... 50 Ohms Unbalanced

Maximum VSWR........................ 1.5:1 Typical

Input Connector ......................... “N” Female

Power Handling..........................1.5 kW (250W PS-I)

Boom Length / Dia .....................77” / 1”

Maximum Element Length .........15”

Turning Radius:..........................Call

Stacking Distance ......................Call

Mast Size ...................................1-1/2” to 2” Nom.

Wind area / Survival ...................0.08 Sq. Ft. / 100MPH

Weight / Ship Wt. .......................6 Lbs. / 8 Lbs.

FEATURES:

The 403CP20 is a light, medium performance circularly polarized antenna. Optimum match and gain are

between 398 & 408 MHz for the satellite band. Computer design techniques help keep spurious side lobes low down

for optimum signal to noise ratios. This antenna features the same CNC machined, O-ring and silicone-gel sealed,

driven element assemblies common to all M2 Yagi antennas. This insures years of trouble free performance

regardless of weather.

SPECIFICATIONS:

*Subtract 2.14 from dBi for dBd

M2 Antenna Systems, Inc.

Model No: 403CP20

TOOL REQUIRED FOR ASSEMBLY: screwdriver, 11/32 nut driver or wrench, 7/16” and1/2” socket or end

wrenches, measuring tape.

1. Assemble the boom using 8-32 X 1-1/4 screws and locknuts to join sections. Sections may may be swaged

to each other or use 7/8” internal splice sections.

ASSEMBLING THE HORIZONTAL ELEMENTS

2. Lay out the elements by “H” length and position as shown the DIMENSION SHEET. Start with the reflector

(longest) element. Balance it on your finger to find rough center and push on a black button insulator to about

1/2” off center. Push the element through the holes 1.937” from the rear of the boom and install the second

button, snugging it up into boom. DO NOT BOTHER CENTERING the element at this time and DO NOT

INSTALL the stainless steel shaft retainers yet. It is easier to do it after all the horizontal elements are

installed in the boom.

3. Install the 3/16” rod DRIVEN ELEMENT as you did the reflector. Then continue with the installation of the

DIRECTORS. Note that the Director Elements do not consistently diminish in length from rear to

front, so pay close attention to length and position.

4. Now begin centering the elements. Use a tape measure to EQUALIZE the amount the element sticking out

on each side of the boom. Once you have all the elements centered, sight down the element tips from the

rear comparing each side. Look for any obvious discrepancies and correct if found.

5. Stainless steel SHAFT RETAINERS lock the elements in place. They should always be used for permanent

and long term antenna installations. For portable or temporary use, the button insulators are adequate for

holding the elements and the retainers may be left off.

To install the stainless steel SHAFT RETAINERS, use thumb and forefinger to hold the retainer over the end

of the PUSH TUBE ( 3/8" x 3" tube, supplied in the kit), internal fingers on retainer dished into tube. HOLD

THE ELEMENT FIRMLY TO PREVENT IT FROM SLIDING OFF CENTER and press the retainer onto the

element end and continue until retainer butts on insulator button. Locking pliers, lightly clamped up against

opposite button insulator will help maintain center reference (if you push the first retainer too far, remove

element from boom, push retainer completely off the element, and start over). Install another retainer to the

opposite side of the element. Continue installing retainers until all elements are secured.

6. Mount the HORIZONTAL DRIVEN ELEMENT

BLOCK / ROD ASSEMBLY to the TOP of the

boom using a single 8-32 X 1-1/4" screw. Orient

the block with the two balun connectors facing to

rear.

7. Install the 8-32 x 1/4” set screws (internal Allen

head - tool supplied) into the SHORTING BARS.

Slide the bars onto the 1/8" Driven Element

Block Rods and the 3/16" driven element rod.

Position the Shorting Bars at 1/8" from the

tips of the 3/16" rods. Align the bars with each

other and tighten the set screws.

ASSEMBLING THE VERTICAL ELEMENTS

Note: The vertical element set is shifted forward on the boom by 1/4 wavelength.This increases isolation

between element planes, improving circularity and ease of phasing / matching the two element sets.

8. Repeat steps #2 through #5 for the Vertical elements, using the Dimension Sheet as your guide to lengths

and spacing.

INSTALLATION OF THE VERTICAL DRIVEN ELEMENT BLOCK DETERMINES THE CIRCULARITYOF

THIS ANTENNA. THE ORIENTATION OF THE BLOCK FOR RHC - RIGHT HAND CIRCULARITY, IS

SHOWN ON THE DIMENSION SHEET.

9. Viewed from the rear of the boom , the VERTICAL Driven Element Block mounts to the RIGHT hand side of

the boom with the Balun connectors oriented to the front. Secure with 8-32 x 1-1/4” screw. Install the

Shorting Bars as in step #7. The HORIZONTAL Driven element block mounts on top of the boom with the

feed connector and power feed through oriented to the rear.

10. Before installing the Baluns and Matching / Phasing Harness, thread 3/8” SEAL NUTS fully onto all

connectors, with the black Neoprene face of the nuts facing out. Attach Baluns and Phasing lines to the

403CP20 ASSEMBLY MANUAL

403CP20 DIMENSION SHEET

403CP20 ASSEMBLY MANUAL

10. Before installing the Baluns and Matching / Phasing Harness, thread 3/8” SEAL NUTS fully onto all connectors, with the

black Neoprene face of the nuts facing out. Attach Baluns and Phasing lines to the Driven Element Blocks and Junction

Block as shown on the Dwg. Tighten the connectors gently using a 7/16" end wrench. Once the connectors are tight,

back the Seal Nuts out and finger-tighten firmly up against the face of the connectors (or tighten gently with 1/2” end

wrench). A lot of torque is unnecessary. Depending on model and polarity, the Vertical balun may loop around another

element. This is normal. Form balun coax until it is close to the boom and secure with a nylon cable tie. Also secure the

other balun and the matching / phasing harness coax with cable ties. Ties should be snug but not crushing or kinking

the coax.

11. Use good quality coax and “N” connector for your feedline (see Installation Tips). Secure feed coax near connector on

Junction Block, to provide stress relief. 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 crossboom. Do not route feedline 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. Since the feed line represents significant

weight it is best to have it attached and fastened to the boom with cable ties before final mounting the plate. Use two 1" U-

bolts and the stainless nuts and lock washers provided. DO NOT OVER TIGHTEN. 1-1/2” and 2” U-bolts (and stainless

steel nuts / lockwashers) are provided for mounting the antenna to your NON-CONDUCTIVE mast or crossboom.

THIS COMPLETES THE ANTENNA ASSEMBLY.

INSTALLATION TIPS

13. The 403CP20 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 crossboom. A mast or crossboom of any NON-

CONDUCTIVE material must be used. Fiberglass is the prime choice for its strength and weather resistance. Mount the

436CP30 so that element tips are at least 12” from any conductive material (mast, tower, feedline, etc.).

14. Recommended feedlines, in order of preference: Andrews or Celwave 1/2” hardline Times FM-8 or Belden 8214

Try to keep the cable run to under 100 ft. to prevent excessive signal loss.

15. To maintain proper phasing when stacking two or more antennas, mount each with the same orientation of Driven Element

Blocks. DO NOT MOUNT IN MIRROR IMAGE. See the Specification Sheet for stacking distances. For more detailed

stacking information contact M2.

CAREFULLY MANUFACTURED BY:

M2 Antenna Systems, Inc.

4402 N. Selland Ave. Fresno, CA

(559) 432-8873 FAX (559) 432-3059

403CP20 PARTS & HARDWARE

DESCRIPTION QTY

Boom section #1, 1 x .058 x 59" SOE ........................ 1

Boom section #2, 1 x .058 x 19.5" ............................... 1

Boom to mast plate, 3 x 4 x .125" ................................ 1

Elements, 3/16" alum. rod x (see dims.) ..................... 20

Driven element block assembly, ................................ 1

Driven element/ Polarity switch assembly.................... 1

`T' Block assembly ...................................................... 1

Balun, RG-6U halfwave length 13.00” ......................... 2

Phasing line, RG6-U quarterwave length 20.00”......... 1

Phasing line, RG6-U three quarterwave length 7.00” .. 1

U-bolt and cradle, 2” .................................................... 2

U-bolt, 1" no cradle ..................................................... 2

Assembly instructions ................................................. 1

IN HARDWARE BAG

Shorting bars, .75 x 1.532 x .250" mach. alum. .......... 4

Button insulators, 3/16" black ...................................... 40

Shaft Retainers, 3/16" ss ............................................. 40

Nut, 5/16-18 ss ............................................................ 4

Lockwasher, 5/16" ss................................................... 4

Screw, 8-32 x 1-1/4" panhead ..................................... 5

Set screw, 8-32 x 1/4" ss ............................................ 8

Locknut, 8-32 ss .......................................................... 2

Nuts, 1/4-20 ss............................................................. 4

Lockwasher, 1/4-20 ss ................................................ 4

Seal nuts, 3/8-32 gold zinc........................................... 8

Allen wrench, 5/64" ..................................................... 1

Push tube, 3/8 x 3" (for keeper installation) ................. 1

Cable ties, 8"................................................................ 4

M2ANTENNA SYSTEMS, INC.

4402 N. Selland Ave.

Fresno, CA 93722

(559) 432-8873 Fax: 432-3059

www.m2inc.com Email: [email protected]

M2 Antenna Systems, Inc. 4402 N. Selland Ave. Fresno, CA 93722

Tel: (559) 432-8873 Fax: (559) 432-3059 Web: www.m2inc.com

Rev.00

M2 Antenna Systems, Inc.

Model No: PS-400CM

SPECIFICATIONS:

*Subtract 2.14 from dBi for dBd

FEATURES:

The PS-400CM polarity switch kit is designed to work with any M2 circular polarized antenna. It allow instantaneous

selection of right or left hand circularity. Originally designed for Nasa for many of their 100 to 500 MHz satellite and space

craft applications, the PS-400CM is now used by many amateur VHF enthusiasts to performance flexibility to both terrestrial

and satellite applications.

The heart of the unit is a small, low loss coaxial switch carefully designed into the driven element block. Only one

driven element block PS-400CM is required to achieve full right hand and left hand selection. There are no frequency sensi-

tive elements in the block assembly so the PS-400CM or its UHF equivalent can be used on most M2 CP antenna from 100

to 500 MHz. The PS-400CM can handle 250W of continuous RF transmission power. Losses are less than 0.2 dB.

Installation is easy and involves only the removal of one of the original Driven Element assemblies and then mounting the PS

-400CM in its place.

Model .........................................PS-400CM

Frequency Range.......................300 to 500 MHz

Isolation, 2M / 440......................50 dB / 40dB

Feed Impedance. .......................50 Ohms Unbalanced

VSWR.........................................1.2:1 or better

Connectors.................................“F” Females

Ins. Loss, 2M / 440.....................0.1 / 0.2 dB

Switch Time, In / Out ..................20ms / 15ms

Power Handling 2M / 440 ...........200 W / 150 W

DC power req. ............................12 VDC @ 80mA

Block size / Rod Dia ...................2” X 2” X 1-1/4” / 1/4”

Maximum Element Length..........16”

Operating Temp range ...............-50°c to 150°c

Weight / Ship Wt.........................2.0 Lbs. / 4 Lbs.

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