Doppler Systems DDF7000 User manual

DOPPLER
DOPPLER DOPPLER
DOPPLER SYSTEMS
SYSTEMSSYSTEMS
SYSTEMS
DDF7000
DDF7000DDF7000
DDF7000 (MPT)
(MPT)(MPT)
(MPT)
USER
USERUSER
USER’S
’S’S
’S MANUAL
MANUALMANUAL
MANUAL
© December 3, 2011
Do ler Systems LLC / PO Box 2780 / Carefree, AZ 85377
Revision A: July 19, 2013
Revision B: October 17, 2013
Revision C: June 26, 2015
Revision D: July 30, 2017
Revision E: January 17, 2020

Do ler MPT Users Manual
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CONTENTS
CONTENTSCONTENTS
CONTENTS
W
WW
WARRANTY INFORMATION
ARRANTY INFORMATIONARRANTY INFORMATION
ARRANTY INFORMATION ................................
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INTRODUCTION
INTRODUCTIONINTRODUCTION
INTRODUCTION ................................
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22
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SPECIFICATIONS
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONS ................................
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MOBILE ANTENNA INSTALLATION
MOBILE ANTENNA INSTALLATIONMOBILE ANTENNA INSTALLATION
MOBILE ANTENNA INSTALLATION ................................
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FIXED SITE ANTENNA ASSEMBLY
FIXED SITE ANTENNA ASSEMBLYFIXED SITE ANTENNA ASSEMBLY
FIXED SITE ANTENNA ASSEMBLY ................................
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9
Antenna Mounting Location ............................................................................................................. 9
Single Band Antenna Installation ..................................................................................................... 9
Mounting the Mast to the Antenna ............................................................................................. 9
Attaching the Bottom mast to Your Mast ................................................................................. 12
AttachING The Cables ................................................................................................................ 13
Attaching the Elements .............................................................................................................. 13
Two Band Antenna Installation ....................................................................................................... 18
Three Band Antenna Installation .................................................................................................... 20
MARINE
MARINEMARINE
MARINE BAND ANTENNA ASSEMBLY
BAND ANTENNA ASSEMBLYBAND ANTENNA ASSEMBLY
BAND ANTENNA ASSEMBLY ................................
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............................. 24
2424
24
Selecting a Location for the Antenna ............................................................................................. 24
Mounting the Mast to the Antenna ................................................................................................ 25
Attaching the Antenna Mast to Your Mast ..................................................................................... 27
Mounting the Elements and Connecting the Cables..................................................................... 28
DDF7001 PROCESSOR CONNECTIONS
DDF7001 PROCESSOR CONNECTIONSDDF7001 PROCESSOR CONNECTIONS
DDF7001 PROCESSOR CONNECTIONS ................................
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.......................... 29
2929
29
Power and S eaker Connection ..................................................................................................... 34
Receiver Connection ....................................................................................................................... 34
Com uter Connection ..................................................................................................................... 35
CONNECTING USB DEVICES TO THE DDF7001
CONNECTING USB DEVICES TO THE DDF7001CONNECTING USB DEVICES TO THE DDF7001
CONNECTING USB DEVICES TO THE DDF7001 ................................
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.............. 38
3838
38
USB-to-Serial Converters................................................................................................................. 39
NMEA Devices ................................................................................................................................. 39
DDF7056 Yaw Rate Sensor ............................................................................................................ 39
USB Receivers ................................................................................................................................. 40
Serial Receivers ............................................................................................................................... 41
Use of Receivers not Su orted by the Firmware ......................................................................... 41
USING THE MPT AS A SLAVE PROCESSOR
USING THE MPT AS A SLAVE PROCESSORUSING THE MPT AS A SLAVE PROCESSOR
USING THE MPT AS A SLAVE PROCESSOR ................................
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..................... 42
4242
42
Changing the Processor to the Slave Configuration ..................................................................... 43

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Connecting the Slave to the Master ............................................................................................... 45
O eration Behind a Firewall ........................................................................................................... 45
CONFIGURING TH
CONFIGURING THCONFIGURING TH
CONFIGURING THE DIRECTION FINDER
E DIRECTION FINDERE DIRECTION FINDER
E DIRECTION FINDER ................................
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......................... 46
4646
46
INTERFACING TO THE DDF7001 DIRECTION FINDER
INTERFACING TO THE DDF7001 DIRECTION FINDERINTERFACING TO THE DDF7001 DIRECTION FINDER
INTERFACING TO THE DDF7001 DIRECTION FINDER ................................
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..... 47
4747
47
Using the Binary Serial Interface .................................................................................................... 47
Command and Data Structure .................................................................................................. 48
Commands ................................................................................................................................. 50
Res onses .................................................................................................................................. 56
Audio Interface ................................................................................................................................ 59
INDEX
INDEXINDEX
INDEX ................................
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Figures
Figure 1: Arrangement of Mobile Antennas .............................................................................6
Figure 2: VHF Mobile Antenna Installation..............................................................................7
Figure 3: THF Mobile Antenna Installation..............................................................................7
Figure 4: Remove the longer cap screws to install the lower mast ........................................10
Figure 5: Secure the lower mast to the frame using the cap screws ......................................11
Figure 6: Attach the lower mast to your mounting mast with the mast clamp ....................12
Figure 7: VHF antenna frame mounted on mast ....................................................................13
Figure 8: Arrangement of the antenna element mounting hardware ...................................14
Figure 9: Three Wire Element Mounting Arrangement ........................................................15
Figure 10: Antenna element mounted on the balun................................................................16
Figure 11: Fully Assembled VHF Antenna..............................................................................17
Figure 12: Connecting mast and cables installed for two antenna installation....................18
Figure 13: Assembled UHF-VHF Antenna..............................................................................19
Figure 14: UHF Antenna Frame Installed on Mast................................................................20
Figure 15: UHF to THF mast with cables................................................................................21
Figure 16: THF Antenna Frame Installed ...............................................................................22
Figure 17: THF Element mounting hardware.........................................................................23
Figure 18: Remove long screws from the base and set them aside ........................................25
Figure 19: Install the base mast on to the antenna using the long screws.............................26
Figure 20: Attached the lower mast to your mounting mast with the mast clamp ..............27
Figure 21: Assemble marine antenna.......................................................................................28
Figure 22: DDF7001 Connectors ..............................................................................................29
Figure 23: Single Antenna Fixed Site DF Installation ............................................................29
Figure 24: Direction Finder with RS232 receiver ...................................................................30
Figure 25: Single Antenna Fixed Site System with LAN Connection ...................................31
Figure 26: Three Antenna Fixed Site Installation...................................................................32
Figure 27: Basic Mobile Installation for Homing....................................................................33
Figure 28: Mobile Installation with GPS .................................................................................33
Figure 29: Power and Speaker Connections............................................................................34
Figure 30: Receiver Connections ..............................................................................................35
Figure 31: Connection into a network with a switch, hub, or router ....................................35
Figure 32: Doppler DF Discover will display all direction finders connected on a LAN ....36
Figure 33: Direct connection with crossover cable .................................................................36
Figure 34: Network Interface Setup in Windows....................................................................37

1
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
WARRANTY INFORMATIONWARRANTY INFORMATION
WARRANTY INFORMATION

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The Series 7000 is a high performance radio direction finding system that operates using the
synthetic Doppler principle in which a circular array of antennas are combined in a way that
simulates a single element rotating in a circular path. As the simulated element approaches the wave
front of an RF signal, the frequency increases due to the Doppler effect, and as it recedes from the
transmitted source, the frequency decreases. The amount of frequency change (deviation) is related
to the speed of rotation and the diameter of the antenna array, while the modulation frequency is
equal to the frequency of rotation (the antenna sweep frequency). When connected to a narrow
band communication receiver, the sweep frequency is present on the audio output. To obtain the
bearing angle, the direction finder processes this audio output.
Many features are present in the Series 7000:
•The system may be used with either an 8-element high accuracy fixed site antenna or a 4-
element magnetic mount antenna for mobile operation.
•The sweep frequency may be set to 250, 500, 1000 or 2000 Hz to avoid tone frequencies
that may be present in the signal modulation.
•Advanced signal processing is used to detect the signal with the receiver either squelched or
unsquelched. Signals as short as 80 msec can be detected.
•The sweep direction automatically reverses from clockwise to counterclockwise to
compensate for asymmetries in the receiver.
•An internal audio amplifier and loudspeaker output are provided for monitoring the signal,
and a sharp notch filter removes the sweep frequency for clarity.
•Two host USB ports allow for direct connection of USB receivers and other USB devices.
•An Ethernet connection allows the direction finder to be easily networked via the Internet
or an Intranet.
•Sturdy antenna construction will survive wind loads up to 120 mph (60 mph with ½ inch of
ice buildup)
•Audio can be streamed from the direction finder to the computer over the Ethernet.
•Wide bandwidth biconical antennas provide excellent sensitivity throughout the entire
operational frequency band.
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INTRODUCTION
INTRODUCTIONINTRODUCTION
INTRODUCTION

3
Introduction
•Designed to work with standard commercial narrow band FM receivers
•Highly configurable allowing for autonomous operation and multiple networking options
•Master-Slave configuration allows up to 32 frequencies to be monitored simultaneously using
one antenna.

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DF Method
Synthetic
-
Doppler with patented "Smooth Summing"
Frequency Range
125
-
1000 MHz
Accuracy 1 deg rms (8 element antenna)
2.5 deg rms (4 element antenna)
Resolution 0.1 deg
Sampling Rate 2 samples per second (adjustable)
Sensitivity -123 dBm
Averaging Adjustable from 1 to 20 samples
RF pulse detection 80 ms minimum
Commutation frequency
Adjustable (250, 500, 1000,
2000 Hz)
Voltage Range 11 - 14 VDC
Interfaces 2 USB Host
Ethernet (RJ45)
Receiver audio and RSSI
3.5 mm Speaker Out
Power 7.2 W @ 12 VDC (processor and one antenna)
Temperature Range -40 °C to 85 °C (antenna)
0 °C to 70 °C (processor)
Dimensions 7.3" x 3.5" x 1.13" (processor)
Weight 0.75 lbs (processor)
CE Compliant Per EN 61000-6-2, EN 61000-6-4 AND EN 301 489-1
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SPECIFICATIONS
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONS

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Mobile Antenna Installation
Note: Do not place the direction finder antennas near a transmitting antenna. Transmitting
too close to the DF antennas can cause catastrophic damage to the summing unit.
Four antenna elements are used for mobile operation. At frequencies below 500 MHz, magnetically
mounted quarter wave whips are used. These antennas must provide a good coupling to the ground
plane, and must be of exactly the same type. It is especially important that the coaxes used have the
same length. Doppler Systems antennas DDF7061 and 7062 use the same magnetic mount base and
cover the frequency ranges 88-136 and 136-500 MHz respectively. Cut the whips to resonance using
the chart provided with the antennas and space them approximately 1/8 to 1/4 wavelength apart on
the car s roof. (See table for spacing recommendation)
Antenna Spacing Recommendation
Frequency
Range
(MHz)
Low High
Spacing
(in)
Spacing
(cm)
100 120 23.7 60.2
120 144 19.8 50.2
150 180 15.8 40.2
180 220 13.1 33.2
220 250 11.1 28.1
250 300 9.5 24.1
300 360 7.9 20.1
360 430 6.6 16.8
430 500 5.6 14.2
Note: To avoid damage to the input circuitry used in the RF summer, touch the antenna ground plane before
attaching the whips to the magnetic mounts.
It is important that the vehicle provides at least 1/4 wavelength of ground plane outboard of the
antennas.
Place the RF summer (DDF7080) on the car with the cables oriented towards the rear of the car.
Connect the magnetic mount antenna cables to the corresponding TNC connectors on the RF
summer. (That is, the left front antenna to the left front connector, etc. See Figure 1.) Locate the
summer near the back of the car (e.g. the lid of the trunk) so that the magnetic mount antenna cables
do not have excessive slack. Secure the four antenna cables together with nylon ties so that they are
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MOBILE ANTENNA INSTALLATION
MOBILE ANTENNA INSTALLATIONMOBILE ANTENNA INSTALLATION
MOBILE ANTENNA INSTALLATION

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not free to move around and touch the antenna elements. Route the control and RF cables through a
rear window. For mobile operation in the 700-1000 MHz band, antenna DDF7064 should be
mounted directly on top of the RF summer. This antenna provides an extended ground plane, a wind
shroud, and four stub type antennas built into TNC connectors. Place the assembled RF
summer/antenna in the center of the car roof. Be sure to use the safety strap provided with the
DDF7064 antenna.
1/8 to 1/4
Wavelength
1/8 to 1/4
Wavelength
DF Summing
Unit
Cables exit toward rear of the
vehicle
ntenna
ntenna B
ntenna C ntenna D
Front of vehicle
Figure 1: Arrangement of Mobile Antennas

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Mobile Antenna Installation
The photos below show typical installations.
Figure 2: HF Mobile Antenna Installation
Figure
3
:
THF Mobile An
tenna Installation

9
9
Fixed site antennas are shipped unassembled. This section provides assembly instructions.
IN THIS CHAPTER
IN THIS CHAPTERIN THIS CHAPTER
IN THIS CHAPTER
Antenna Mounting Location ................................................................................. 9
Single Band Antenna Installation .......................................................................... 9
Two Band Antenna Installation ......................................................................... 18
Three Band Antenna In
stallation
................................
................................
......
20
ANTENNA MOUNTING LOCATION
ANTENNA MOUNTING LOCATIONANTENNA MOUNTING LOCATION
ANTENNA MOUNTING LOCATION
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) 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. See the
application note “In-band Interference from a Nearby Transmitter” available on our web site
www.dopsys.com for more information.
SINGLE BAND ANTENNA INSTALLATION
SINGLE BAND ANTENNA INSTALLATIONSINGLE BAND ANTENNA INSTALLATION
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 MA
MOUNTING THE MAMOUNTING THE MA
MOUNTING THE MAST TO THE ANTENNA
ST TO THE ANTENNAST TO THE ANTENNA
ST TO THE ANTENNA
All of the antenna assemblies come with a bottom mast, an antenna frame, and antenna elements.
 At the base of the antenna frame there are 5 longer screws protruding from the bottom
connector plate as shown in the photo below. Remove these screws and lock washers. Do not
remove the 3 other screws.
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FIXED SITE ANTENNA ASSEMBLY
FIXED SITE ANTENNA ASSEMBLYFIXED SITE ANTENNA ASSEMBLY
FIXED SITE ANTENNA ASSEMBLY

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Figure 4: Remove the longer cap screws to install the lower mast

11
Fixed Site Antenna Assembly
 Next position the bottom mast to fit over the connectors and drain plug and fasten the mast to
the antenna frame using the screws and lockwashers from step 1. The figure below shows the
mast connected to the frame.
Figure 5: Secure the lower mast to the frame using the cap screws

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ATTACHING THE BOTTOM MAST
ATTACHING THE BOTTOM MAST ATTACHING THE BOTTOM MAST
ATTACHING THE BOTTOM MAST TO YOUR MAST
TO YOUR MASTTO YOUR MAST
TO 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

13
Fixed Site Antenna Assembly
ATTACHING THE CABLES
ATTACHING THE CABLESATTACHING THE CABLES
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 cable ties to fasten the cables to the masts.
At this point the assembly should look similar to the photo below.
ATTACHING THE ELEMENTS
ATTACHING THE ELEMENTSATTACHING THE ELEMENTS
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: HF antenna frame mounted on mast

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Figure 8: Arrangement of the antenna element mounting hardware

15
Fixed Site An
tenna Assembly
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

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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