M2 Antenna Systems 418CP30 Manual de usuario

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

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

REV B

M2 Antenna Systems, Inc.

Model No: 418CP30

FEATURES:

The 418CP30 is a practical sized, yet high performance circular polarized antenna with a remarkably

clean pattern. The versatile pattern is important in order to match the antenna’s noise temperature with modern

low noise preamps. This antenna is ideal for commercial LEO satellite work and was designed with a second res-

onance band at amateur frequencies of 335-338 MHz, with a peak gain of 16 dBi. The CNC machined driven

element module is O-ring sealed and weather tight for low maintenance and long-term peak performance. Inter-

nal connected are encapsulated in a space-age silicone gel that seals out moisture and improves power han-

dling. The 3/16” 6061-T6 rod elements are centered to minimize interaction and maintain good ellipticity. Insula-

tors are UV stabilized and locked in place with stainless keepers. Rugged construction, uncompromising perfor-

mance for the boom length: that's the M2 418CP30!

Model ................................. 418CP30

Frequency Ranges* ........... 414-427/435-438 MHz

Gain**.................................. 16.0 dBi

Front to back ....................... 21 dB Typical

Ellipticity .............................. 1.5 dB Typical

Beamwidth ........................ 35o circular

Feed Impedance. ................ 50  , Unbalanced

Maximum VSWR................. 1.7:1 Max

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

Power Handling ..........................600W

Boom Length / Dia......................128.5” / 1" Dia

Longest Element.........................13.75”, 3/16" Rod

Stacking Distance.......................50”

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

Wind area / Survival .....................1 ft.2/ 120 mph

Weight / Ship Wt.........................5 lbs. / 7 lbs. UPS

SPECIFICATIONS:

*Dual Band Resonance **Subtract 2.14 from dBi for dBd

TYPICAL TOOLS REQUIRED: measuring tape, phillips screwdriver, 5/16”, 11/32”, 7/16”, and 1/2

spin-tite, end wrenches and / or sockets. Heavy duty models may require larger sizes.

1. Lay out the boom sections and assemble using the

DIMENSION sheet as a guide for position and hardware.

2. Cut a strip of masking tape about 6” long. Fold the

ends under and stick the tape to a flat surface, sticky

side up. Lay out the elements by length and position as

shown the DIMENSION sheet. NOTE: THE ELEMENTS

IN THIS ANTENNA DO NOT ALL TAPER IN LENGTH.

Now lift off the REFLECTOR and find the rough center by

balancing it across finger. Push on a black button insulator

to about 1/2” from center. Insert the element through the

holes at the rear of the boom and install the second

button. IF THE ELEMENT IS LOOSE IN THE BUTTONS,

SQUEEZE THE SMALL END OF EACH BUTTON

SLIGHTLY WITH PLIERS UNTIL IT OFFERS

SIGNIFICANT RESISTANCE WHEN THE ELEMENT IS

INSERTED. THIS WILL HELP TO HOLD THE ELEMENT

IN POSITION DURING SUBSEQUENT OPERATIONS.

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 may not

consistently diminish in length from rear to front, so

pay close attention to length and position.

3. Now begin centering the elements. Use a tape measure to EQUALIZE the amount the element

sticking out on each side of the boom. Once all are centered, sight down the antenna from the rear

and compare tip symmetry. Look for any

obvious discrepancies and correct if found.

4. Stainless steel SHAFT RETAINERS are used

for securing the elements and insulators.

Always use retainers for permanent and long

term antenna installations. For most portable or

temporary use, the button insulators are

satisfactory and the retainers may be left off.

5. Use thumb and index finger to hold a Shaft

Retainer over end of the 3/8” X 3” push tube

(internal fingers dished into tube). Hold the

element firmly and start the keeper onto the rod

by applying pressure with the push tube. Push

the Shaft Retainer down element until tight against the button insulator (Locking pliers, lightly

clamped up against opposite button insulator will help maintain center reference and keep you from

pushing the first Shaft Retainer too far). Repeat for the opposite side. Continue installing Shaft

Retainers until all elements are locked in place.

6. Mount the DRIVEN ELEMENT FEED BLOCKS to the boom using a single 8-32 screw 1-1/4" long.

Orient with feed and balun connectors as shown on the Dimension Sheet. The ‘T’ block mounts

behind the rear driven element.

MASKINGTAPE

OREQUIVALENT

FACEUP

ELEMENTPREPARATION

REFLECTOR

ELEPREP

M.STAAL

5-24-05

FRONTDIRECTOR

418CP30 ASSEMBLY MANUAL

7. Generally the balun is installed in one long loop. Attach balun to the block connectors and tighten

gently using a 7/16" end wrench. Form the balun coax close to the boom and secure with cable ties

(snug but not crushing or kinking the coax).

8. Install the 8-32 x 1/4” set screws (internal Allen head - tool supplied) into the SHORTING BARS.

Slide the bars onto the 3/16” rod driven element tips and the 1/8" Feed Block Rods. Position the

Shorting Bars as specified on the DIMENSION SHEET: the distance given is between the outer

face of the Feed Block and the inner face of the Shorting Bar. Align the bars and rods with each

other and tighten the sets crews. NOTE: the shorting bar dimensions are different on the

OPTIONAL circular switched driven element.

9. Now attach all the cables. The two medium length cables are the 1/2 wave baluns. The long coax

cable goes to the front driven element. And the short cable goes to the rear driven element. Tighten

the connectors lightly with a 7/16” end wrench.

REMEMBER CENTER MOUNTED ANTENNA MUST BE PLACE ON A FIBERGLASS OR OTHER

STRONG, NON CONDUCTIVE MAST AND THE FEEDLINES MUST RUN OFF THE REAR OF

THE ANTENNA. THIS PREVENTS THE CIRCULAR FIELD OF THE ANTENNA FROM BEING

DISTORTED BY A METALLIC MAST OR METALLIC FEEDLINE.

10. For center mounted antennas, the boom to mast plate is normally mounted as close as possible to

the balance point (with feedline or a temporary equivalent attached). For rear mounted antennas,

use the boom length provided behind the reflector element. Keep mounting plate at least 1" from

any element. Secure plate with two U-bolts and the stainless nuts and lock washers provided. DO

NOT OVER TIGHTEN. Additional U-bolts and stainless nuts / lock washers are provided for

mounting the antenna to your mast. THIS COMPLETES THE ANTENNA ASSEMBLY.

11. For optimum performance, mount antenna high and in the clear. Always use high quality coax and

connectors. Old, corroded, or poor quality materials can SERIOUSLY affect VSWR, gain, and

pattern. If possible, test the antenna, connectors and feedline BEFORE installation. At 6' in height,

the antenna will exhibit performance approaching the specifications. If it doesn't, check feedline

and connectors for continuity and shorts. Check antenna shorting bars, element placement and

length, against Dimension Sheet.

12. MOUNTING AND STACKING INFORMATION

Rear mounted antennas can generally be mounted in any polarization to any type of mast,

conductive or non-conductive.

Center mounted antennas can also be mounted in any polarity. However, a mast or cross boom

in-line (parallel) with the element plane must be non-conductive. Anything conductive in the

element plane will disrupt the pattern and reduce performance (even the feedline). When a non-

conductive mast or cross boom is in-line with elements, route feedline away at right angles to the

elements and reattach at least 6" beyond element tips. Fiberglass is the recommended material for

a non-conductive mast or cross boom because of it's strength and weather resistance.

Stacking: See the Dimension Sheet for stacking separation dimensions.

1. All driven element blocks MUST be oriented to the same side of boom.

2. All boom-to-mast plates MUST be mounted at the same point on the boom.

3. Feed / phasing lines MUST be of equal electrical length or, ideally, multiples of 1 wavelength in

order to maintain equal phasing in the array.

418CP30 ASSEMBLY MANUAL

418CP30 DIMENSION SHEET

NOTE: RIGHT HAND CIRCULARITY SHOWN

418CP30 DRIVEN ELEMENT CABLE ROUTES

PHASING LINE

3/4 WAVE

JUNCTION BLOCK

SCREW, 8-32 X 1-1/4”

D.E. BLOCK

SCREW, 8-32 X 1-1/4”

D.E. BALUN

PHASING LINE

1/4 WAVE

D.E. BLOCK

SCREW, 8-32 X 1-1/4”

FIG. 4

CABLE ROUTING DIAGRAM

DESCRIPTION ................................................................…………………………..QTY

BOOM SECTION #1, 1” X .058” X 48" SOE (M2ASB418CP30-1) ..........................1

BOOM SECTION #2, 1” X .058” X 60” SOE (M2ASB418CP30-2) ..........................1

BOOM SECTION #3, 1” X .058” X 26.5” (M2ASB418CP30-3)................................1

BOOM-TO-MAST PLATE, 3” X 4” X .125”(M2APT0019) ........................................1

ELEMENT SET , 3/16” X SEE DIMENSION SHEET ...............................................1

DRIVEN ELEMENT ASSEMBLY (SADEA418CP30)...............................................2

JUNCTION BLOCK ASSEMBLY (SADE0065) ........................................................1

BALUN CABLE , 1/2 WAVE RG-6U, 13” .................................................................2

PHASING LINE, LONG, 3/4 WAVE RG-6U, 6”........................................................1

PHASING LINE, SHORT, 1/4 WAVE RG-6U, 9” .....................................................1

U-BOLT AND CRADLE, 2".......................................................................................2

U-BOLT, 1-1/2".........................................................................................................2

U-BOLT 1” ................................................................................................................2

ASSEMBLY MANUAL ..............................................................................................1

IN HARDWARE BAG:

SHORTING BAR, 1/8” AND 3/16” HOLES..............................................................4

BUTTON INSULATORS...........................................................................................60

SHAFT RETAINER, (KEEPER) SS..........................................................................60

NUT, 5/16-18 SS ......................................................................................................4

LOCK WASHER, 5/16 SS ........................................................................................4

NUT, 1/4-20, SS .......................................................................................................4

LOCK WASHER, 1/4” SPLIT RING , SS..................................................................4

SCREW, 8-32 X 1-1/4” SS .......................................................................................7

SET SCREW, 8-32 X 1/4, SS...................................................................................8

LOCKNUT, 8-32 SS .................................................................................................4

CABLE TIE, NYLON ................................................................................................4

ALLEN HEAD WRENCH, 5/64”................................................................................1

PUSH TUBE, 3/8” X 3” .............................................................................................1

M2 ANTENNA SYSTEMS, INC.

4402 N. SELLAND AVE.

FRESNO, CA 93722

(559) 432-8873 FAX: 432-3059

www.m2inc.com Email: [email protected]

418CP30 PARTS & HARDWARE

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