DX Engineering DXE-RSEAV-1 Manual de usuario

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Receive Short

Element Active

Vertical Antenna

DXE-RSEAV-1 - Single Active Vertical Antenna

DXE-RSEAV-1FVI - Single Active Vertical Antenna

w/Feedline Voltage Inserter

DXE-RSEAV-INS-Revision 0

DXE-RSEAV-1

shown with optional ground rod

1200 Southeast Ave. - Tallmadge, OH 44278 USA

Phone: (800) 777-0703 ∙ Tech Support and International: (330) 572-3200

E-mail: DXEngineering@DXEngineering.com

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Introduction

This manual covers both the DXE-RSEAV-1 and the DXE-RSEAV-1FVI. The DXE

RSEAV-1FVI is exactly the same but comes with the DXE-FVI-1 DC Power Injector.

Class leading performance makes the DXE-RSEAV-1 Receive Short Element Active

Vertical Antennas the best choice on the market for VLF through HF reception, including

long distance AM broadcast, Medium Wave and Shortwave (SWL), new low frequency

Amateur bands, DXing, contesting and everyday HF operations.

DX Engineering Receive Short Element Active Vertical Antennas (RSEAV) offer

excellent low noise radio frequency reception from below 100 kHz to above 30 MHz. They

include a high quality three-section 8.5 ft. (2.6m) aluminum tubing whip, mounting plate

and the all new Active Matching Unit DXE-AVA-3 (also sold separately). When deployed

in the appropriate location, RSEAV antennas provide significantly better weak signal

reception than other actives and full size transmit-capable antennas due to reduced noise

and lower spurious signal interference, making them the best choice on the market for

DXing and contesting in Amateur Radio, and for long distance AM and Shortwave Listening (SWL).

Each Receive Short Element Active Vertical Antenna is intended to be mounted on a ground rod at ground

level in a clear area away from all metal, towers and other antennas. They are sold individually and in sets of

2, 3, 4 and 8 elements for use in phased array systems.

At the heart of the RSEAV Antennas is the DXE-AVA-3 Active Matching Unit. Its state-of-the-art

broadband operational amplifier design works as a high impedance buffer for the connection to a short

element of 6 to 24 feet. It achieves unparalleled weak signal reception with these features and benefits:

•Ultimate frequency coverage of 40 kHz* to 30 MHz for VLF through HF (including the 2200m and

630m Amateur bands)

•High Third Order Intercept (TOI) Performance +39dBm for superior strong signal handling equal to top

transceivers

•Consistent unit to unit gain for greatly improved array performance

•Virtually Flat Gain (+/-0.4 dBm) across the entire frequency range

•Internally settable gain (default -6, 0, or +6 dBm) for different ambient noise

locations and element sizes

•Direct DC via second F connector –internal settable choice for separate DC and RF

coaxial cables for best performance, or standard Bias Tee DC on the RF coax

•Each DXE-AVA-3 Active Matching Unit operates on 12 -15 VDC at 25mA

•Element is grounded when power is removed

•75 ohm F connectors support field serviceable RG-6 Quad Shield suitable up to 1,000

feet for VLF through HF

*Frequency coverage below 100 kHz requires Direct DC on a separate DC only coaxial cable.

THIS IS A RECEIVE-ONLY SYSTEM

You should never attempt to transmit through the system.

The use of bypass relays and sequential timing is required to avoid damage to the receiver and active

antennas in the proximity of transmit antennas.

Do NOT place any active receive system on the same mast or tower as the transmit antenna.

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Features

Receive Short Element Active Vertical RSEAV Antenna Sets offer these features:

•Long Life − High quality stainless steel mounting hardware

•Compact − Three piece aluminum 8.5 ft. element has low visual and environmental impact

•Ideal for portable use; easy to transport

•Easy Mounting and Installation Flexibility − Pre-drilled insulated mounting plate and included

stainless steel U-Bolt Saddle clamps for mounting to your ground rod

Location Considerations

The best place to install your active antenna is where you have the recommended space

away from power lines and away from your house, tower or any structures which are

excellent sources of noise. Even passive wiring in a wood building, a metal building or

metal fencing can act as a pickup antenna that can re-radiate noise.

The RSEAV antennas can be affected by atmospheric and ambient noise. Local noise

can be random or directional in nature. Every effort must be made to locate sources of

noise that could be eliminated at the source. Dimmer switches, electric timers,

photocell-operated security lights, and many other items can be sources of unwanted

noise. Now obsolete plasma monitors and television receivers are a known generator of

unwanted noise interference. Most modern LED or LCD flat panel televisions are not

broadband noise generators.

If the noise source is external and single directional in nature, using two DXE-

RSEAV-1 antennas in conjunction with the DXE-NCC-2 Receive Antenna Phasing

Controller could allow the user to phase out the noise being received. Large transmit

antennas are also very good source of re-radiated noise. A DXE-RSEAV-1 or the

DXE-AVA-3 cannot be mounted on, or near, a mast or tower due to induced noise

and potential RF overload.

Ideally, your receive antenna should be a minimum of 1/2-wavelength away from any

transmit antenna (on the lowest frequency) to avoid mutual coupling and the transfer of

any noise being re-radiated by the transmit antenna. If the receive antenna is located

1/10-wavelength to 1/2-wavelength from a transmitting antenna, the AVA-3 Active

Matching Unit must be powered off at least 5 ms before transmitting on the transmit

antenna. However, with an Active antenna less than 1/2-wavelength away, noise

coupling from the nearby transmit antennas becomes more pronounced. At frequencies

above 25 MHz, the active element length becomes a partial wavelength, increasing

noise coupling and pattern distortion.

When installed closer than 1/2-wavelength on the lowest frequency from a transmit

antenna, to assure highest protection for the active antenna, a DXE-TVSU-1B Time

Variable Sequencer Unit should be used to ensure the correct transmit-to-receive

switching. The RSEAV series antenna grounds the element when power is turned off.

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General Information

This compact receiving antenna system operates over a very wide bandwidth with superior strong signal

performance. The output Third Order Intercept (TOI) rating of +39 dBm is significantly better than most

aftermarket preamplifiers and receivers - making it one of the cleanest active antennas on the market,

reducing or eliminating spurious signals.

Feedline decoupling, absent in some other popular designs, is also exceptionally good. Decoupling the shield

greatly reduces feedline conducted noise and unwanted signal interference.

The DXE-AVA-3 Active Matching Unit achieves unparalleled weak signal reception from 40 kHz* to 30

MHz. It may be used for VLF through HF reception with short metal or wire elements that range from less

than 6 feet up to 24 feet. The DXE-AVA-3 has a myriad of broadband RF applications as a high impedance

buffer between a physically small antenna element and the receiver.

DXE-RSEAV-1 –Single Active Antenna with no power source included; intended for use with devices that

send +13.8 Vdc on the RF coaxial cable, such as DXE-RTR-2 or DXE-NCC-2. Also, this model is for those

who will be using the Direct DC feature of the second F connector to power the DXE-AVA-3 with DC on a

separate coaxial cable. The DXE-RSEAV-1 includes:

DXE-AVA-3 Active Matching Unit

Non-conductive mounting plate

High quality Aluminum 3-piece antenna elements, 8 feet 6 inches long

Pair of Element connection wires, with ring and fork terminals

Stainless steel clamps and hardware

DXE-RSEAV-1FVI –Single Active Antenna that includes a bias tee and power source; for use with any

receiver or a transceiver with a receive antenna (RX ANT) input. May be used on any transceiver with the

optional DXE-RTR-2 Modular Receive-Transmit Interface

DXE-AVA-3 Active Matching Unit

Non-conductive mounting plate

Aluminum 3-piece antenna element, 8 feet 6 inches long

DXE-FVI-1 - Feedline Voltage Injector − powers the matching system and provides radio

connections

Includes a US plug wall transformer; 120 Vac 60 Hz to +12 Vdc, nominal

Stainless steel clamps and hardware

Using the Active Receive Verticals in a 4 Square or 8 Circle Array

Use the DX Engineering Receive Four Square System and four RSEAV-1 Antennas (DXE-RSEAV-4) to

configure a four square vertical array. Power and receiver connections are provided through the Four Square

system. Use the Receive Eight Circle system and eight RSEAV-1 Antennas (DXE-RSEAV-8) to configure

an eight circle receiving array. Power and receiver connections are provided through the Receive Eight

Circle system.

Using the Active Receive Verticals with the DXE-NCC-2

The DXE-RSEAV-2P Active Receive Vertical Antenna Set (two RSEAV-1 Antennas) and a DX

Engineering NCC-2 Receive Antenna Phasing Unit are used as a steerable dual vertical array for weak signal

and DXing. RSEAV Active Receive Verticals must be at least 1/10-wavelength away from any transmit

antenna. The NCC-2 switches the power off during transmit. This configuration allows the operator to

selectively null out interference, and thereby enhance the desired received signal direction ability. Every

radio manufacturer and every amateur radio operator's location is different. Refer to the DXE-NCC-2

manual for details. Also, you should consult your radio manufacturer's manual for details and further

requirements.

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DXE-AVA-3

Active

Matching

Unit

Non-

conductive

Mounting

Plate

8-1/2 Foot

Aluminum Antenna

Element with

Connection Wires

DXE-FVI-1

Voltage

Injector

+12 Vdc

AC Adapter

(required

for FVI-1)

DXE-SSVC-1PG

Stainless Steel

Ground Clamp

DXE-SSVC-1P

Stainless Steel

Clamps

DXE-RSEAV-1

DXE-RSEAV-1FVI

WARNING!

INSTALLATION OF ANY ANTENNA NEAR POWER LINES IS DANGEROUS

Warning: Do not locate the antenna near overhead power lines or other electric light or power circuits, or

where it can come into contact with such circuits. When installing the antenna, take extreme care not to

come into contact with such circuits, because they may cause serious injury or death.

Manual Updates

Every effort is made to supply the latest manual revision with each product. Occasionally a manual will be

updated between the time your DX Engineering product is shipped and when you receive it. Please check the

DX Engineering web site (www.DXEngineering.com) for the latest revision manual.

Basic Tools Required

1/4”, 3/8”, 5/16", 7/16", 1/2" wrenches or nut drivers, and a 5/8" wrench

# 2 Phillips Head Screw Driver

7/64” and 3/32” Allen Wrenches - Included in this kit -

Knife or Scissors for cutting the weatherproofing tapes.

Parts needed but not included:

JTL-12555 Jet-Lube SS-30 for antenna elements and all stainless steel hardware

LCT-37534 Loctite Dielectric Grease used on F-Connectors

TES-2155 3M Temflex Tape used to weatherproof the F-Connectors

TES-06143 3M Super 88 Vinyl Electrical Tape - overwrap for UV protection

Ground Rod 1/2” to 3/4” OD used for installing the unit and mounting plate in place

NOTE: The following describes the use of DXE-SSVC-1P and DXE-SSVC-1PG V-Clamps that are

included with the RSEAV. These are used for mounting the AVA-3 on a typical customer

supplied ground rod from 1/2" OD to 3/4" OD.

---------------------

If you plan to mount the RSEAV to a larger mounting mast, you will need two optional DXE-

SSVC-150P and one optional DXE-SSVC-150PG V-Clamps which will accommodate a

mounting mast that is 1" OD to 1-1/2" OD.

AVA-3 Configuration: Internal Jumper Settings for RF Gain (J1) and DC

Supply Selections (J2 and J3)

Before mounting your state-of-the-art AVA-3 Active Matching Unit, understanding the correct choices for

internal jumper settings is vitally important.

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RF Gain Selection - J1

The DXE-AVA-3 features internal jumper selection of relative gain settings, with the factory default of -

6dB, as well as 0dB and +6dB settings, to match the ambient noise conditions for the antenna location, and to

adjust for the size of the antenna element to be used. Remove the cover from the AVA-3 to allow access to

the jumpers. Set the jumpers to the desired positions

as described.

As a rule of thumb, always use the lowest gain

setting that works for the application. This is

usually the setting with the minimum discernible

ambient background noise that is at or just above

the noise floor of the receiver. This setting will

allow the greatest signal-to-noise improvement for

all signals, especially weak signals.

The default jumper setting of -6 dB gain is the best

choice for the majority of installations, including

those with the RSEAV-1 8.5 ft. antenna elements. This lowest gain setting

is also the best choice for receiving locations where AM Broadcast (MW)

stations are within 10 miles (16 km).

As the gain setting is increased in the AVA-3, the possibility for RF

overload and distortion increases at extremely high signal input levels.

Therefore, in locations with multiple transmitters or high ambient local

noise, do not use the +6dB setting. Longer elements, such as 20 to 24 ft.,

that are typically used for low band, AM, LF and VLF will also produce a

higher ambient local and atmospheric noise floor, especially at 0dB or

+6dB settings.

DC Power Source Selection J2 and J3 - The factory default setting is DC

over the RF coax. You can also select direct DC via a separate coax. In

either case - when power is supplied to the AVA-3 - the Green LED will be

ON.

The versatility of the AVA-3 includes the option of using the Direct DC F connector for installations where

the use of the AVA-3 internal Bias Tee, is undesirable.

NOTE: For optimal receive performance, especially on VLF frequencies from 40 to 200 kHz,

Direct DC is required. For installations where the DC is intended to applied at all times for

uninterrupted reception, such as for skimmers and remote receivers, Direct DC via the separate

coax to the “OPTIONAL DC POWER” input is recommended, so the “75 ΩOUTPUT” coax

carries only RF.

- 7 -

For average Amateur installations for 1.8 to 30 MHz intermittent

operations, where the DC supply is normally turned off, standard

internal bias tee DC over the RF coax is perfectly acceptable.

The internal three-pin jumper headers J2 BT and J3 EXT DC, located

next to the PC board F connector terminals, are used to select the DC

power for the AVA-3. Both headers require identically jumpered

pins in order to function.

The Default setting as supplied is with both

pins 1 and 2 are connected together (jumpers

installed) on both J2 and J3 headers, the bias

tee provides power from the “75 ΩOUTPUT”

coax F connector.

When pins 2 and 3 are connected together

(jumpers installed) on both headers, the

separate “OPTIONAL DC POWER” F

connector supplies DC power to the AVA-3

circuitry. In that case the center pin of the coax

is +13.8 VDC and the shield ground is 0 VDC. When this method of powering the

AVA-3 is chosen, the “75 ΩOUTPUT” coax F connector handles only the received

RF.

When the jumpers are set, replace the cover ensuring the weep holes are toward the

bottom (AVA-3 is mounted vertically as shown above).

Weep holes

Assembly

The assembly described is for a single DXE-RSEAV-1. Use JTL-12555 - Jet-Lube SS-30 on the joints

between the antenna elements and on all stainless steel hardware threads to prevent galling and to ensure

proper torque. NEVER use SS-30 or any anti-seize on RF coaxial connectors.

Orient the black mounting plate with the antenna mounting holes close to the top, as shown in Figure 1.

Mount the AVA-3 matching unit using the 1" hex head bolts, flat washer under each bolt, flat and split

washer under each hex nut.

Figure 1

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Loosely install the two stainless steel U-Clamps on

the black mounting plate using the U-Bolt, V-

Clamp, Flat washers, Split Washers and Hex nuts

as shown in Figure 2.

Figure 2

Antenna and Antenna Mounting Plate Parts List

Item

Description

QTY

Item

Description

QTY

Mounting Plate, Black

#6-32 x 3/4” Socket Head Cap Screw

1/2” Tube, Drilled

#6 Flat Washer

3/8” Tube, Drilled

#6-32 Nylon Lock Nut

1/4” Tube, Drilled

#4-40 x 1/2” Socket Head Cap Screw

#10-24 x 1-1/2” Hex Head Cap Screw

#4 Flat Washer

#10 Flat Washer

#4-40 Nylon Lock Nut

#10-24 Hex Nut

1/4” Vinyl Cap

#10-24 Nylon Lock Nut

REF

#10 Round Term with short wire & Forked Term

#10 External Tooth Washer

7/64” Allen Hex Wrench

5/16” Aluminum Spacer, 11/32” long

3/32” Allen Hex Wrench

Figure 3

- 9 -

NOTE: The parts list (above) and drawing only show the parts for the 3-piece antenna and antenna

mounting plate. Other parts in this kit include the AVA-3 unit, mounting hardware, two ground rod

mast mounting clamps and one ground clamp with tab which are described in the following

assembly.

Bottom Antenna Element Assembly

Refer to the drawing shown in Figure 3 and Figure 4 for the antenna assembly.

Figure 4

Install 2 hex head bolts (#10-24 x 1-1/2” long) in the mounting plate using flat washers and hex nuts

as shown in Figure 5, tighten in place.

Figure 5

- 10 -

Place a flat washer and a spacer on each of the hex head bolts. The

bottom antenna element has larger holes on one side, these

larger holes face the spacers. The bottom antenna element is

installed so the spacers are inside of the element. Refer to Figures 3

& 4for details.

On the bottom hex head bolt, install an external tooth washer, the

short antenna wire with a ring terminal, followed by a flat washer,

split washer and a hex nut as shown in Figure 5. Note the direction

of the wire in the photo. On the top hex head bolt, install a flat

washer, split washer and a hex nut. Tighten in place.

The other end of the short antenna wire has a fork lug, is connected

to the ANTENNA on the AVA-3 as shown in Figure 6 between

the two flat washers. Tighten in place. Figure 6

NOTE: The following describes the use of DXE-SSVC-1P and DXE-SSVC-1PG V-Clamps that are

included with the RSEAV. These are used for mounting the RSEAV on a typical customer

supplied ground rod from 1/2" OD to 3/4" OD.

---------------------------------

If you plan to mount the RSEAV to a larger mounting mast, you will need two optional DXE-

SSVC-150P and one optional DXE-SSVC-150PG V-Clamps which will accommodate a

mounting mast that is 1" OD to 1-1/2" OD.

Mounting the V-Clamp with Tab to a Ground Rod

Attach the longer wire with ring terminal using the hardware described

in Figure 7 to the tab on the included DXE-SSVC-1PG.

Figure 7

Install the customer supplied 1/2” to 3/4” OD by 4 to 6 ft. ground rod

where the Active Receive Antenna will be placed. Leave approximately

16 inches of the ground rod or mounting mast above ground level to

mount the antenna. Depending on soil conductivity, increasing ground

rod depth beyond a few feet for an active receive antenna rarely

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