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

DSE1321LYRMRev12/13

DirectiveSystems&Engineering

2702RodgersTerrace

Haymarket,VA20169‐1628

www.directivesystems.com

703‐754‐3876



2.28‐2.35GHzLoopYagi(RearMount),ModelDSE1321LYRM



SPECIFICATIONS

Frequency range: 2.28 to 2.35 GHz Gain: ≅17.5 dBi

Number of elements: 21 3 dB Beamwidth

Boom length: 36 inches (E plane): ≅24º

Boom diameter: 0.5 inches F/B ratio: >20 dB

Mast diameter: 1 1/2 in. max Maximum Power: 400 W average

Weight: (assembled) 2 pounds assembled Stacking distance: 9 inches vertical (H)

Connector: Type-N female 11 in. horizontal (E)



ASSEMBLYINSTRUCTIONS

1) Unpack the antenna and locate the hardware package. The boom is in one piece and

requires no assembly. Observe that the boom to mast bracket is installed on the rear of the

boom.

2) Attach the boom to mast angle bracket to the boom with the 8-32 x 1" hardware

provided. Install the U-Bolt in the angle bracket. Be careful to leave room for the feedline to

attach to the connector assembly.

3) Attach the feedline and tape it to the bottom of the boom and mast. The connector

should be sealed with silicone RTV or equivalent.

4) Straighten any misaligned elements and re-tighten if necessary. Do not adjust R1 or D1

as they have been set for best VSWR!

5) The antenna SWR has been adjusted at the factory for less than 1.5:1 mismatch.

Additional tweaking can be accomplished by changing the shape of the driven element slightly

and by adjusting the distance between the driven element and R1 and D1. R1 is the reflector

closest to the driven element.

6) If antennas are to be stacked, see "Instructions for Stacking Loop Yagis".

Page|2

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DSE1321LYRMRev12/13

Directive Systems Warranty Policy

All Directive Systems antennas are built with the finest materials available. We take great pride in building a

quality product that will give years of good service and performance. If there is a defect in materials or

workmanship within 90 days of purchase, Directive Systems will repair or replace, free of charge, the defective

part. DO NOT RETURN ANYTHING WITHOUT PRIOR AUTHORIZATION FROM DIRECTIVE SYSTEMS.

Please contact us either by phone or email describing the problem and we will work to resolve it.

If, after examining a new antenna you received, you are not satisfied, contact us immediately for return

authorization and refund. ANY ANTENNA THAT HAS BEEN MODIFIED WILL BE SUBJECT TO A

RESTOCKING CHARGE. IF AN ANTENNA IS SO MODIFIED AS TO MAKE IT UNUSABLE, DIRECTIVE

SYSTEMS RESERVES THE RIGHT TO REFUSE TO ACCEPT THE ANTENNA FOR RETURN.