M2 Antenna Systems 348CP18 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 .........................................348CP18

Frequency Range.......................344 To 351 MHz

*Gain ..........................................14.15 dBic

Front to back ..............................19 dB Typical

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

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

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

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

Power Handling ..........................1.5 kW

Boom Length / Dia......................82” / 1”

Maximum Element Length..........17”

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

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

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

Wind area / Survival ...................0.5 Sq. Ft. / 100MPH

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

M2 Antenna Systems, Inc.

Model No: 348CP18

FEATURES:

The 348CP18 is a high performance circular polarized antenna with a remarkably clean pattern. The pattern is important

in order to match the antenna’s noise temperature with modern low noise preamps. This antenna is ideal for satellite work

but is also excellent for terrestrial uses.

The CNC machined driven element module is O-ring sealed and weather tight for low maintenance and long-term peak

performance. Internal connections are encapsulated in a space-age silicone gel that seals out moisture and improves

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

Insulators are UV stabilized and locked in place with stainless keepers. Rugged construction, uncompromising

performance for the boom length.

SPECIFICATIONS:

*Subtract 2.14 from dBi for dBd

348CP18 ASSEMBLY MANUAL

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. Layout the boom sections and assemble using the DIMENSION

sheet as a guide for position and hardware.

2. Install the 8-32 x 1/4” set screw into each button insulator using

the 3/32” Allen wrench supplied.

3. Cut a strip of masking tape about 6” long. Fold the ends under

and stick the tape to a flat surface, sticky side up. Layout the ele-

ments by length and position as shown ON the DIMENSION

SHEET. Remove 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. Install the 3/16” rod

DRIVEN ELEMENT as you did 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.

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 centered, tighten the set screw in the insulators

on each side. After all are centered, sight down the antenna from

the rear and compare tip symmetry. Look for any obvious

discrepancies and correct if found. REPEAT THESE STEPS AND

INSTALL THE OTHER PLANE OF ELEMENTS. NOTE THEY ARE

SHIFTED FORWARD ON THE BOOM BY 1/4 WAVELENGTH.

5. Mount the special REAR DRIVEN / POLARITY SWITCH FEED BLOCK to the boom using two (2) 8-32 x 1-1/4”

screws. Orient with feed and balun connectors as shown on the Dimension Sheet. The “T” block unit mounts just

behind the rear REFLECTOR element with one more 8-32 x 1-1/4” screws.

6. Thread a 3/8” seal nut fully onto each “F” connector on each block, with black Neoprene side facing out.

Generally the balun is installed in one loop. Attach balun to the block connectors and tighten gently using a 7/16”

end wrench. The two medium length cables are the 1/2 wave baluns. Then back the seal nuts out and

finger-tighten firmly up against the face of the connectors (or tighten gently with 1/2” end wrench). Later, after the

phasing lines are installed form the balun coax and phasing lines close to the boom and secure with cable ties

(snug but not crushing or kinking the coax).

7. Install the 8-32 x 1/4” set screws using the 3/32” Allen wrench 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 a 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 set screws. NOTE: the shorting bar

dimensions may be different on the OPTIONAL circular switched driven element.

8. Now attach the phasing cables. The long, 3/4 wavelength 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 and then run the

seal nut up against the face to the connector and tighten just one turn past finger tight with a1/2” end wrench.

9. Route the cables close to the boom and avoid crossing or touching the element butts to minimize detuning. This

is a critical area if the antenna match is to be preserved. Because the cables can couple into the field of each

element set, it is important to route the cables as shown and use the cable ties provided to keep the cables tight

against the boom. THIS COMPLETES THE ANTENNA ASSEMBLY

348CP18 DIMENSION SHEET

OPTIONAL MANUAL AZ-EL SYSTEM ASSEMBLY

1. Connect the two MAST CLAMPS SHELLS together loosely with four (4) 1/4-20 x 3/4” bolts.

2. Attach the mast clamps to the “TACO SHELL” ELEVATION U-BRACKET using two (2) more 1/4-20 x 3/4”

bolts. Add two more 1/4-20 x 3/4” bolts, lock washers and flat washers to control the elevation tilt angle.

3. Secure THE SPECIAL 3” x 8” x 1/4” PLATE t to the elevation tilt bracket with two 1/4-20 x 3/4” bolts. Then add 2

SETS OF 1” SADDLES and loosely attach with 1/4-20 x 1-1/2” bolts and locknuts.

4. Mount the AZ-EL assembly on the top of the PORTABLE FOLDING STAND and tighten the mast clamp bolts.

Now insert the rear of the antenna boom into the saddles to about 3” behind the reflector, orient the antenna so the

rear set of elements are horizontal and tighten the saddle bolts.

GENERAL GUIDELINES

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.

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

non-conductive.

348CP18 PARTS & HARDWARE

348CP18 PARTS LIST

DESCRIPTION .............................................................................. QTY

BOOM SECTION # 1, 1” X 0.058 X 54”......................................... 1

BOOM SECTION # 2, 1” X 0.058 X 54” SOE TFS ........................ 1

ELEMENTS, 3/16 ROD x DIM SHEET .......................................... 18

DRIVEN ELEMENT ASSEMBLY................................................... 2

BALUN FOR D.E. ASSEMBLY, (RG-6) ........................................ 2

PHASE LINE, 1/4 WAVE (RG-6) ................................................... 1

PHASE LINE, 3/4 WAVE (RG-6) ................................................... 1

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

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

SHORTING BAR, 1/4” X 3/4” (M2ASB0080)................................. 4

U-BOLT & CRADLE, 2” ................................................................. 2

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

ZIP TIE, (MEDIUM)........................................................................ 5

PENETROX / ZINC PASTE CUP .................................................. 1

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

HARDWARE

BUTTON INSULATORS ................................................................ 36

SHAFT RETAINER, SS ................................................................. 36

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

LOCKWASHER, 5/16 SS .............................................................. 4

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

LOCKWASHERS, 1/4 SS .............................................................. 4

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

LOCKNUT, 8-32 SS....................................................................... 2

SETSCREW, 8-32 X 1/4, SS ......................................................... 8

SEAL NUTS, 3/8-32....................................................................... 8

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

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

*TFS=TO FIT ITSELF

OPTIONAL AZ-EL MOUNTING SYSTEM

DESCRIPTION QTY

MAST CLAMP HALF ..................................................................... 2

ELEVATION U BRACKET (TACO SHELL) ................................... 1

COUNTERWEIGHT, 3-1/4” X 1-1/2” 4 lb....................................... 1

PLATE, 1/4” X 3” X 8” .................................................................... 1

SADDLE, 1” ................................................................................... 4

BOLT, 1/4-20 X 1-3/4” SS.............................................................. 4

BOLT, 1/4-20 X 4” SS.................................................................... 1

BOLT, 1/4-20 X 1-1/2” SS.............................................................. 4

BOLT, 1/4-20 X 3/4” SS................................................................. 4

BOLT, 1/4-20 X 3/4” FLATHEAD SS ............................................. 3

LOCKNUT, 1/4-20 SS.................................................................... 2

LOCK WASHER, 1/4” SPLIT RING SS ......................................... 2

M2ANTENNA SYSTEMS, INC.

4402 N. SELLAND AVE.

FRESNO, CA 93722

(559) 432-8873 FAX: (559) 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: PS365-70CM

SPECIFICATIONS:

*Subtract 2.14 from dBi for dBd

FEATURES:

The PS365-70CM polarity switch kit is designed to work with any M2 circular polarized antenna. It allow instantane-

ous 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 PS365-70CM 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 PS365-70CM is required to achieve full right hand and left hand selection. There are no frequency sen-

sitive elements in the block assembly so the PS365-70CM or its UHF equivalent can be used on most M2 CP antenna from

100 to 500 MHz. The PS365-70CM 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

PS365-70CM in its place.

Model .........................................PS365-70CM

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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