DDF2020M works UHF band and DDF2020T work UHF and VHF.
Therefore we decided to discontinue M model.!!

UHF,TSCM Radio Direction Finder

DF2020M (KIT)

The DDF2020M is designed to operate as a general antenna even when its power is off.
Therefore, switching of antennas is not needed.
In addition, the DDF2020M is waterproof since it is set inside of the car.

Enjoy attractive and exciting hunting with this product!

DDF2020M Radio Direction Finder kit requires minimum assembly for 10~15 Minutes

The DDF2020M DF is an economical but very sophisticated Doppler DF "kit" with a GPS input, and RS232 output to provide the ability to indicate its location and draw bearing automatically or manually on Google Earth map to find the RF transmitter more conveniently.

DDF2020M kit Includes eight assembled / tested PC boards: MAIN board, 2 Sub boards, and 1 antenna board in the main unit. Completion work is required by the user to finish the DF main unit. Guidelines for the completion work are provided.

The user must provide a NB FM receiver, 4 antennas with mounts for external DF antenna unit and a PC for DF bearing (Windows OS). DDF2020 display program further requires a GPS receiver with NMEA 4800 baud output.

UHF Doppler DF – 4 Antennas primarily for mobile DF, 400~1000 MHz
Economy, high performance DSP / micro processor design, software intensive
Sold as a kit – Main unit, antenna unit and associated cables
RS232 output for Windows PCs (Agrello format)
Uses modified Joe Moell Wideband Antenna design
9 ~ 28 VDC operation
Optional GPS Receiver available

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* DF Antennas are not included

Specifications:

Rcvr Freq: Determined by user-provided FM receiver, range 400 to 1000 MHz

Antenna: Four elements for DF and one auxiliary element for improving sensitivity and accuracy,

wave vertical with assembled

Ant Scan: Scan rate 430 Hz, rotation clockwise (viewed from above antenna)

Ant Switch: Modified Joe Moell Wideband Doppler DF antenna design

Employs Agilent HSMP3893 SMT PIN diodes

SMT / stripline circuit design, SMA output connector

Audio Input: FM receiver speaker audio, 1.0K ohm load. 25db dynamic range.

GPS Input: 4800 baud RS232 input, NMEA $GPRMC, $GPGGA and / or $GPVTG messages.

Output 1: RS232 Agrello DF message, 4800 baud, 8N2. (15 messages / second )

Ant Outputs : Four discrete active HIGH outputs for DDF 2020 Antenna ( one per antenna )

DC Power : 9 ~ 28 VDC

Voice Filter : Switched-capacitor filter, (SCF) 4 sections. Bandwidth 0.2 Hz

Multi Display

The MultiDisplay of DDF2020M provides a combined numeric and pelorus display in the main board. A high quality display, with 2 microcomputers and an RS232 input that accepts Agrello DF messages.

The pelorus display employs 36 high density LEDs, with 4 yellow LEDs at cardinal headings. Option straps allow "hold/blink" of last valid DF data, or pelorus "orbit" when data goes invalid. All LEDs briefly "flash" (2 second intervals) for enhanced nighttime viewing

3 digit numeric readout, 0.36 inch characters
36 LED pelorus display, 4 yellow cardinal LEDS
Selectable HOLD/ORBIT display for old DF data
Power-on self-test

Contents in the package

Case with assembled parts - requires a minimum assembly
Upper panel
Antenna Board
Antenna cable (DDF2020M to FM Receiver – BNC Jacks)
Antenna Board Cable
Power Switch
3.5 mm Audio Cable Set
Main Cable
Cigar Jack Power Cord
Bracket and Screws
Screw pack

Assemble Main Unit

Put Front Decal on the front of case – Begin right side (Power switch hole) first.
Plug the power switch into the hole – Push it until its clamps hold the case.
Connect the switch on the sub board.
Connect the main cable and antenna board cable.
Assemble Antenna Board with 4 screws on antenna poles
Cover with Upper Panel and fasten it with screws
Attach the bracket if necessary.

DDF2020M Connection Diagram

When you use RS232(Serial) To USB Convertor, please install the right driver comes with it.
Antenna N should be placed in frontward of vehicle to indicate 0 degree of DF.Display
When DDF2020 tunes with the right RF signal, it outputs clear 430 Hz audio signal which will indicates stable LED

Navi 2020

Positioning and Map plotting program on Google earth^TM with GPS data

Google Earth normally works with an open internet link, but areas previously viewed are archived and available for offline viewing. This makes Navi2020 suitable for use in real time mobile hunts, when an internet link is not available.

The Navi2020 "map plotting" program accepts DDF2020 DF + GPS messages and plots them on a Google Earth display window. Manual latitude / longitude and DF bearing inputs allow operation without a DDF2020 DF. Up to 100 plot points allowed, and hunt results are saved in archive files.