M2 Antenna Systems 400-800-8 User manual

M2 Antenna Systems, Inc. 4402 N. Selland Ave. Fresno, CA 93722
Tel: [phone] Fax: [phone] Web: www.m2inc.com
©2017 M2 Antenna Systems Incorporated 06/12/17
Rev.00
Model .........................................400-800-8
Frequency Range.......................400 To 800 MHz
*Gain ..........................................10 dBi
Front to back ..............................20 dB Nominal
Beamwidth ...............................52° Nominal
Feed Impedance........................50 Ohms
Maximum VSWR........................1.5:1
Input Connector..........................“N” Female
Power Handling..........................1 kW
Polarity........................................RHCP or LHCP
Operating Temperature..............-50 F To 130 F
Wind area / Survival...................100 MPH
Weight / Ship Wt.........................15 Lbs.
M2 Antenna Systems, Inc.
Model No: 400-800-8
FEATURES:
The M2 400-800-8 Helix antenna offers performance characteristics for specialized fixed and rapid deploy opera-
tions within the 400 to 800 MHz band. It is perfect for either terrestrial or satellite applications. The antenna is shipped
with the helix assembled less ground plane. Finishes are optional. Optional arrays of 2 or more are available. Other fre-
quency ranges and gains are also available down to 100 MHz. Complete motorized, computer controlled AZ-EL systems
are also manufactured by M2. Where circular polarity is not required but high bandwidth is, M2 offers a line of various log
periodic antennas from 5 to 1300 MHz. If it is antenna related, we probably have made it. Call us with your requirements.
SPECIFICATIONS:
*Subtract 2.14 from dBic for dBdc

4402 N. Selland Ave, Fresno CA 93711 [phone] FAX [phone]
www.m2inc.com Email: [email protected]
TOOLS REQUIRED: #2 Phillips head screwdriver, 11/32 nut driver and 7/16” socket open end wrench.
1. Unpack the factory assembled HELICAL antenna, the CENTER REFLECTOR PLATE, and the two (2) REFLECTOR
HALVES. Attach the Reflector halves to the Center Reflector Plate using 8-32 x 3/4” screws and locknuts.
2. Add the g-plane clamp #1 to the center reflector plate near the center hole using 1/4-20 x 3/4 bolts and lock wash-
ers. Then slide the assembly up the rear end of the helix boom. Align the hole in the rear boom section of the helix
assembly with that of the g-plane clamp #1 and use a 1/4-20 x 3/4” bolt to set the position of the ground plane by
threading the bolt through the g-plane clamp #1 and into the boom. This sets the position of the ground plane. Then
add the g-plane clamp #2 and secure using 1/4-20 x 2 1/2 bolts and locknuts.
3. Slide the feed support block on to the helix, note that the hole in the support block is off set, install the block so there
is the greatest distance between the helix and the ground plane. Align the holes on the ground plain and leave loose
at this point. Then slide the ‘N’-connector block assembly on the helix and rotate the connector down through the
large hole in the plate. Secure the block to the plate with four (4) 8-32 x 1-1/2” screws and locknuts. Add the 1/4-20
bolt through the feed block support and ground plane and secure. Now install the 1/4-20 x 1/4” set screw in the
round end of the feed block assembly and tighten, using the supplied 1/8” Allen wrench. Note set screw markings
from original test assembly. Helix should protrude no more than 1/8” past the feed post. This completes the assem-
bly.
400-800-8 HELICAL ASSEMBLY MANUAL

FEED ASSEMBLY DETAIL
GROUND PLANE DETAIL

DESCRIPTION QTY
HELIX AND MAIN BOOM ASSEMBLY .........….1
CENTER MOUNTING PLATE, ..................... ….1
REFLECTOR PLATE .................................... ….2
G-PLANE CLAMP 1” BM DIA #1...................….1
G-PLANE CRADLE CLAMP 1” BM DIA #2 ... ….1
FEED BLOCK ASSEMBLY ...........................….1
FEED SUPPORT BLOCK, .50 X .750 X 2.5”.….1
ASSEMBLY MANUAL...................................….1
HARDWARE BAG
DESCRIPTION QTY
BOLT, 1/4-20 X 2.0 SS..................................….2
BOLT, 1/4-20 X 1-1/4 SS...............................….1
BOLT, 1/4-20 x 3/4” SS .................................….3
SET SCREW, 1/4-20 x 1/4” SS .....................….1
LOCKWASHER, 1/4” SS...............................….2
NUT, 1/4-20, SS............................................….2
LOCKNUT, 1/4-20, SS ..................................….1
SCREW, 8-32 X 1-1/2”, SS ...........................….4
SCREW, 8-32 X 3/4”, SS...............................…10
LOCKNUT, 8-32 SS .........................................14
1/8 ALLEN WRENCH....................................….1
400-800-8 PARTS LIST
M2ANTENNA SYSTEMS, INC.
4402 N. SELLAND AVE.
FRESNO, CA 93722
[phone] FAX: [phone]
www.m2inc.com Email: [email protected]