DMU-2000 Technical Information

Home Interests My Opinion KC8RP Family Genealogy Favorites

           

 

The following are some of the specs of the internal computer

bulletThe system uses an Intel Celeron 400MHz microprocessor with 256K L2 cash and 100MHz bus speed.
bulletIt uses the Intel 815 chipset.
bulletOne board computer from PFU Ltd of Japan, a Fujitsu company, with 640K RAM and 256 meg expansion memory. It also has an onboard 256 Meg flash card.
bulletThe Intel 82801provides most of the boards peripheral functions including  AC97 link, USB 1.1, Ethernet LAN, IDE controller and other board support functions, see the PDF file for details.
bulletThe 82815 graphics and memory controller provides high resolution video to VGA connector on back, it also has an LCD panel connector and memory management. See the PDF file for details.
bulletThe AD1885 controls the AC'97 SoundMAX Codec. See the PDF for details.
bulletTwo RS232 ports, one external the other used by the TRX input.
bulletPhoenix BIOS allows boot options of USB, network etc.
bulletIt is possible to boot another OS such as 98 or 2000, BIOS change, and use all the onboard controllers.
bulletDMU-2000 uses Vine Linux a Japanese product.


This unit has an Ethernet connector but it is covered up from the factory.  Either the RS232 or the USB interface could be used to interface to a computer for a one keyboard and mouse interface at the desktop.

This could potentially be turned into a real usable analyzer etc. with computer interfacing, there is enough capability that is not used but it would take a Linux programmer especially with Vine. Click on DMU-2000 for the technical manual. I have gone over the DMU-2000 and discovered that the technical manual is not up-to-date, it appears to be for the earlier version of the CPU board. I have added an updated version that includes my new pages as well as the old. I have checked the correctness as much as possible but use it at your own risk, DMU-2000 updated.

As an alternative to the DMU-2000 I would recommend using either the RF Space or the LP-PAN adapter. Both are better as spectrum analyzers and cost less.

The following are pictures and diagrams of the current DMU-2000

Main page for BIOS setup.

PCI configuration page.

Shows other boot possibilities.

To enter BIOS you must do it from power on and then press F3 when indicated. The unit powers on and boots from the back rocker switch not the front power switch. When the system is booted the screen will go blank until you press the front power switch. The front power switch simply tells the radio the unit is on and ready to receive data.

 


This shows the back panel and it's external interfaces. The power rocker switch, com port for a GPS unit, a cover over the Ethernet connector, PS2 keyboard, USB 1.0 not used except for a keyboard, audio out not used, audio in from radio used for AF scope, VGA display and the TRX input from radio.

CPU with shield removed. Also shown is the interface unit and the small audio board interface.

Power supply on other side of CPU. Just above it is the memory card interface. To the left on the back is the TRX interface.

Interface board, cpu side.

Interface board, back panel side.

Interface board, bottom.

Memory card interface.

Memory card interface, bottom.

TRX interface.

TRX unit connected to memory unit.

TRX unit connected to front panel power switch.

CPU board, interface connector side.

CPU board, memory flash card on back side.

CPU interface connectors.

The DMU uses the TRX input from the radio as well as the audio out on the back of the radio. The TRX is nothing more than a RS-232 I/O and an audio signal from the radio. I will show this in more detail on the DMU updates page.

There was a very interesting article in April 2014 QST called a Tiny Python Panadapter on page 33. This article contains a lot of information that could be used to create a really good interface for the FT-2000 and other Yaesu radios that us the TRX interface. I was looking at a inexpensive computers on eBay and I bought a Wyse thin client Rx0L for $30. This unit has 2 megs of memory, 2 gig Flash card, 2 serial ports, 6 USB 2.0 ports, 100/1000 Ethernet, Wireless, audio and a 1.5 gig processor. These units have no fan and are totally silent. They also have 2 DVI ports, one of which has VGA capabilities with an adapter. This seems like a good combination to use with the Python Panadapter. I copied the article for future use, I cannot make it available due to copyrights.

See Wyse Rx0L page for details.