Doppler Systems DDF7011 User manual

USER'S GUIDE
DDF7011 AND DDF7012
USERS MANUAL

CONTENTS
WARRANTY INFORMATION ............................................................................. I
INTRODUCTION ......................................................................................... 1
DDF7011 INSTALLATION AND SETUP ............................................................... 5
Getting Started ....................................................................................... 5
Antenna Mounting .................................................................................... 6
Single Band Antenna Installation ................................................................... 7
Mounting the Mast to the Antenna ............................................................. 7
Attaching the Bottom mast to a our Mast ................................................... 9
Attaching the Cables ........................................................................... 10
Attaching the Elements ........................................................................ 10
Two Band Antenna Installation ................................................................... 15
Three Band Antenna Installation ................................................................. 17
Core Module Connections ......................................................................... 23
DDF7012 INSTALLATION AND SETUP .............................................................. 29
Getting Started ..................................................................................... 29
Antenna Mounting .................................................................................. 31
Core Module Connections ......................................................................... 33
SPECIFICATIONS ....................................................................................... 38
DDF7012 Specifications........................................................................... 39
DDF7011 Specifications........................................................................... 39
INDEX .................................................................................................... 41

DDF7011 and DDF7012 Users Manual
Revision A
Figure 1: The DDF7011 and 7012 utilize the same Core Module............................................1
Figure 2: Block Diagram of Three Band Fixed Site Direction Finder (DDF7011) ................2
Figure 3: Mobile Direction Finder (DDF7012)..........................................................................3
Figure 4: : Remove the loose cap screws to install the lower mast ..........................................7
Figure 5: Secure the lower mast to the frame using the cap screws ........................................8
Figure 6: Attach the lower mast to your mounting mast with the mast clamp ......................9
Figure 7: Cables connected to the VHF Antenna....................................................................10
Figure 8: Arrangement of the antenna element mounting hardware ...................................11
Figure 9: Three Wire Element Mounting Arrangement ........................................................12
Figure 10: Antenna element mounted on the balun................................................................13
Figure 11: Fully Assembled VHF Antenna..............................................................................14
Figure 12: Upper mast and cables installed for two antenna installation.............................15
Figure 13: Assembled UHF-VHF Antenna..............................................................................16
Figure 14: UHF Antenna Frame Installed on Mast................................................................17
Figure 15: TU Antenna Mast Installed ....................................................................................18
Figure 16: THF Antenna Frame Installed on Mast ................................................................19
Figure 17: THF Antenna Mounting Hardware.......................................................................20
Figure 18: Assembled THF-UHF-VHF Antenna ....................................................................21
Figure 19: Fixed Site Core front panel connections................................................................25
Figure 20: VHF and UHF antenna arrangement....................................................................32
Figure 21: THF Mobile Antenna Installation (cables exit toward rear of vehicle)..............33
Figure 22: Mobile core module connections ............................................................................35

Doppler Systems will repair or replace, at their option, any parts found to be defective in
either materials or workmanship for a period of one year from the date of shipping. Defective
parts must be returned for replacement. In the US, contact the factory, or overseas your local
distributor, for advice about returning any defective parts or equipment.
If a defective part or design error causes your radio direction finder to operate improperly
during the one-year warranty period, Doppler Systems will service it free of charge if returned
at owner s expense. If improper operation is due to an error on the part of the purchaser,
there will be a repair charge.
Doppler Systems are not responsible for damage caused by the use of improper tools or
solder, failure to follow the printed instructions, misuse or abuse, unauthorized modifications,
misapplication of the unit, theft, fire or accidents. This warranty applies only to the equipment
sold by Doppler Systems and does not cover incidental or consequential damages. Doppler
Systems radio direction finding equipment is designed to for locating interfering radio
signals. It is not intended for use as a navigation aid, and in particular it is not to be used for
aircraft or marine navigation.
WARRANTY INFORMATION

1
The Doppler Systems DDF7011 and DDF7012 contain all the necessary components required
to locate a radio frequency source. Both systems utilize the same core module shown in
Figure 1 below.
Cha ter
1
INTRODUCTION
Figure 1: The DDF7011 and 7012 utilize the same Core Module

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DDF7011 and DDF7012 Users Manual
User's Guide
The DDF7011 is primarily used as a fixed site system and consists of the following:
 A core module
 A fixed site direction finder antenna system (one to three bands)
 A fixed site radio modem antenna (optional)
 A GPS receiver
 A self-test generator (optional)
 Antenna cabling
 12 V Power Supply
 A laptop computer (optional)
 Carrying cases for all the components
Figure 2 shows the block diagram of a typical DDF7011 three band
configuration.
Figure 2: Block Diagram of Three Band Fixed ite Direction Finder (DDF7011)

3
Introduction
The DDF7012 is used in mobile systems and utilizes the same core module and contains the
following components:
 A core module
 A mobile direction finding summer assembly
 Four 1/4 wave whip antennas
 A GPS receiver
 A compass (optional)
 A yaw rate sensor (optional)
 A laptop computer (optional)
 Antenna cabling
 Carrying cases
Figure 3 depicts a typical DDF7011 configuration.
Figure 3: Mobile Direction Finder (DDF7012)

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DDF7011 and DDF7012 Users Manual
User's Guide
This manual will describe the installation and setup of the DDF7011 and DDF7012. For details
on operating the system see the TargetTrack Software User s Manual and the MPT User
Interface Software Guide.

5
IN THIS CHAPTER
Getting Started ..................................................................................................... 5
Antenna Mounting .............................................................................................. 6
Single Band Antenna Installation ................................................................... 7
Two Band Antenna Installation..................................................................... 15
Three Band Antenna Installation.................................................................. 17
Core Module Connections ............................................................................. 23
GETTING STARTED
As delivered the DDF7011 suite consists of the following
 One Pelican case containing the core module
 One Pelican cases containing cabling
 One case containing the fixed site antennas and connecting masts
 Two long cases containing data radio antennas (optional)
 One laptop computer case (optional)
Initial Setup
1) Select locations for the radio modem and the direction finder antennas. Try to maintain
as much separation between these two antennas as possible and make sure the cables
will reach to the location of the direction finding equipment.
2) If this site is to be used as the control site remove the vertical radio modem antenna from
one of the long antenna cases. If it is to be used as a remotely connected site, remove the
radio modem yagi antenna from one of the long antenna cases.
3) Assemble the radio modem antenna
4) Connect the radio modem antenna to an antenna mast or tower.
5) Remove the coaxial cable with an N connector on one end and a TNC connector on the
other and connect the N connector to the radio modem antenna.
6) Secure the cable to the mast in several places using zip ties
7) If the yagi antenna is being used, rotate the antenna to point the antenna at the control
location.
8) Assemble the fixed site antenna using the hardware provided in the DF antenna case.
Cha ter
2
DDF7011 INSTALLATION AND SETUP

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DDF7011 and DDF7012 Users Manual
User's Guide
9) Connect one control cable and one coaxial cable to each antenna.
10) Use the mounting hardware to connect the direction finder antenna to the mast.
11) Use zip ties to secure the cables to the inter connecting antenna hardware and the mast
12) Open the core module case.
13) Connect the radio modem antenna to the TNC connector on the core module.
14) Connect each of the direction finder antenna and control cables
15) Remove the laptop computer from its case
16) Connect the laptop power cable from the connector panel to the laptop computer
17) Connect the Ethernet crossover cable between the laptop and the core module.
18) Connect the GPS receiver to the core module. Position the GPS receiver so it can easily
acquire the GPS satellites.
19) Connect 12 V power to the unit using the supplied cable and power supply.
20) Apply power to the core module.
21) Check to make sure the direction finder and the receiver are powered
22) Turn on the laptop and start the TargetTrack software.
ANTENNA MOUNTING
For optimum results it is necessary to mount the fixed site antenna as high as possible above
the average terrain. It is also required that the antenna be mounted at the top of any metallic
structure (tower or mast) so that there is no metal in the antenna pattern. Do not mount the
antenna near any transmitting antenna. Serious damage can occur if large rf fields are
applied to the antenna. If you are using a radio modem, maintain maximum separation of
the radio modem antenna from the direction finding antenna. Horizontal and vertical
separation is best if possible. See http://www.dopsys.com/appnotes/Interference.html
http://www.dopsys.com/appnotes/Interference.html for more information.

7
7
SINGLE BAND ANTENNA INSTALLATION
This section details the assembly of a single band fixed site antenna. The photographs are for
a VHF antenna but all the antennas use identical mounting hardware.
MOUNTING THE MAST TO THE ANTENNA
All of the antenna assemblies come with a bottom mast, one or more antenna frames, and
antenna elements.
 At the base of the antenna frame there are a number of longer screws protruding from
the bottom connector plate as shown in the photo below. Remove these screws.
Figure 4: : Remove the loose cap screws to install the lower mast

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DDF7011
and DDF7012 Users Manual
User's Guide
 Next position the bottom mast to fit over the connectors and drain plug and fasten the
mast to the antenna frame using the screws from step 1. The figure below shows the
mast connected to the frame.
Figure 5: ecure the lower mast to the frame using the cap screws

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DDF7011 Installation and Setup
ATTACHING THE BOTTOM MAST TO A YOUR MAST
The fixed site antennas are furnished with a mast clamp for installation on a pipe or pole. The
diameter of the pipe or pole can be between 1.25 in. and 3.5 in. The figure below shows how
the mast clamp is installed.
Figure 6: Attach the lower mast to your mounting mast with the mast clamp

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DDF7011
and DDF7012 Users Manual
User's Guide
ATTACHING THE CABLES
Unroll the control and coax cables being careful not to damage the ferrites or to crimp the
coax. Be careful to keep the connectors clean from dirt. Fasten the control cable by aligning
the key and turning the outer locking ring until it just meets the red line on the mating
connector. Fasten the TNC connector until it is tight. Use the supplied cable ties to fasten the
cables to the masts.
At this point the assembly should look similar to the photo below.
ATTACHING THE ELEMENTS
Four Wire Biconical Antennas
The antenna elements are mounted to baluns at the end of the frame arms using an o-ring, a
5/16-24 cap screw, and a lock washer. The arrangement of the hardware is shown in the
photo below.
Figure 7: Cables connected to the VHF Antenna

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DDF7011 Installation and Setup
Figure 8: Arrangement of the antenna element mounting hardware

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DDF7011
and DDF7012 Users Manual
User's Guide
Three Wire Biconical Elements
The antenna elements are mounted to baluns at the end of the frame arms using a 5/16-24
cap screw, a flat washer and a rubber washer. The arrangement of the hardware is shown in
the photo below.
Figure 9: Three Wire Element Mounting Arrangement
Cap Screw
Flat Washer
Rubber Washer

13
DDF7011 Installation and Setup
Thread the cap screw into the balun being careful not to cross thread the screw. Tighten the
cap screw until the lock washer is fully compressed. Do not over tighten the cap screw or the
brass threads in the balun may be stripped. Mount all sixteen elements. Align the biconical
elements so that all elements are symmetric. The photo below shows two elements
connected to the balun.
Figure 10: Antenna element mounted on the balun

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DDF7011
and DDF7012 Users Manual
User's Guide
After all the elements are attached the antenna is ready to be erected. The assembled
antenna will look like the photo below.
Figure 11: Fully Assembled VHF Antenna