DM 7025+

Powerful receiver for digital TV and Radio programs..

Main features are a 300 MHz processor; the dreambox DM 7025+ supports the Linux TV API

  • 10/100MBit compatible Ethernet Interface
  • Twin-Tuner DVB-S, DVB-C or DVB-T
  • plug & play, mixable
  • big size OLED display

Technical Features

  • 300 MHz MIPS Processor
  • Enigma 2, Linux Operating System
  • big-size OLED - Display
  • MPEG-2 Hardware decoding, DVB-S
  • TWIN Tuner, mixable, Plug&Play
  • Tuner: DVB-S, DVB-C und DVB-T, pluggable
  • 1 x DVB Common-Interface Slot
  • 2 x Smartcard-Reader (Dreamcrypt CA)
  • V.24/RS232 Interface
  • Integrated Compact Flash Slot
  • 10/100 MBit compatible Ethernet Interface
  • 1 x USB
  • S/PDIF Interface for digital bit stream out (AC-3)
  • 2 x Scart-interfaces
  • RF modulator
  • Audio/Video cinch out
  • 32 MByte Flash, 128 MByte RAM
  • integrated IDE Interface
  • Support for internal IDE HDD 3,5 inch in any capacity
  • unlimited channel lists for TV/Radio
  • channel-change time < 1 second
  • automatic service scan
  • directly bouquet-lists
  • EPG (electronic program guide)
  • Videotext Decoder
  • multiple LNB-Switching control (DiSEqC)
  • OSD in many languages and skin-support

 

DreamBox DM7025+ technical data

DBS-Tuner:
Frequency Range 950 ... 2150 MHz
Signal Level - 65 dBm ... - 25 dBm
Signal-to-Noise Level 12 dB max.
DBS-Tuner Input Connector F-Type female
Input Impedance 75 Ohm
AFC +/- 3 MHz
Demodulation Shaped QPSK
FEC Viterbi and Reed-Solomon
Viterbirate 1/2, 2/3, 3/4, 5/6, 7/8
Roll-off Factor 35 %
Demultiplexing according ISO 13818-1

Common-Interface:
Common-Interface Power Consumption max. 0,3A/5V

Video decoder:
Video Compression MPEG-2 and MPEG-1 compatible
Video Standard PAL G/ 25 Hz, NTSC
Video Formats 4:3 / 16:9
Letterbox for 4:3 TV-Device

Audio decoder:
Audiokompression MPEG-1 & MPEG-2 Layer I and II, MP3
Audio Mode Dual (main/sub), Stereo
Frequency: 32 kHz, 44.1 kHz, 48 kHz, 16 kHz, 22.05 kHz, 24 kHz

Output analog:
Output Level L/R 0,5 Vss on 600 Ohm
THD > 60 dB (1 kHz)
Crosstalk < -65 dB

Output digital:
Output Level 0,5 Vss on 75 Ohm
Sampled Data Filtering 32 kHz, 44.1 kHz, 48 kHz
S/PDIF-Output optical (AC3)

Video parameter:
Input Level FBAS 1 Vss +/- 0.3 dB on 75 Ohm
Teletext filter in conformity with ETS 300 472 Standard

TV-Scart:
Output: FBAS, RGB, S-Video

VCR-Scart:
FBAS

Serielle Interface RS 232:
Typ RS232 bidirectional
Bitrate 115,2 kBit/s max.
Plug Connector SUB-D-9
Function: Update of Firmware

Ethernet:
10/100 MBit compatible interface
Function: Update of Firmware

USB:
USB 1.1 connector

UDMA100 IDE Interface:
for internal HDD
Compact Flash - Reader

LNB power and polarisation per tuner:
LNB Current 500mA max.; short-circuit-protected
LNB Voltage vertical < 14V no load, > 11,5V at 400mA
LNB Voltage horizontal < 20V no load, > 17,3V at 400mA

Count of active satellite position:
DiSEqC 1.0/1.1/1.2 and USALS (Rotor Control)

Power consumption:
< 30W (in operation, horizontal polarization / 400mA LNB current)
< 25W (in operation, no LNB)
< 1W (Deep-Standby-Mode)

Input voltage:
230V / 50 Hz alternating current +/- 15%
110V / 60 Hz alternating current +/- 15%

Physical specification:
Ambient Temperature +15°C...+35°C
Humidity < 80%
Size (W x D x H): 374 mm x 230 mm x 75 mm
Weight: 1,8 kg  without HDD


Information

Flashing a new firmware (image)

Flashing a new firmware with Browser     (then click here)

Flashing a new firmware with DreamUp   (then click here)

Firmware / Image

Date

Release 3.0.3

16.12.2010

 

User manual DM 7025
(PDF - english, for Release from 25.10.2007)

User manual for OLED-Upgrade-Kit modification
(PDF - english from 08.11.2007)

 

DM7025 Bootloader

power modes:

  • Switched on. This is the mode when you watch tv.
  • Standby. When you press the power button on the remote control once, the box will enter
  standby mode. The lcd will go dark, LNB power will be switched off, but the box is still
  alive.
  • Deep-standby. You can enter the deep-standby mode when you press the power-button
  more than a few seconds (and possibly select "shutdown"). Linux will be shut down, but
  the frontpanel processor is still alive, and will wake the box when you press the power
  key again, or a recordings is about to start.
  • Off. When you use the power-suplly switch (or remove power at all), the box is completely
  switched off.

Booting...
The loader
It can boot from JFFS2, Compact flash and tftp. It resides in the first 128k of the NAND flash rom.
Normally, the loader boots linux from the jffs2 boot partition, but you can configure it to boot from anything else. It can be configured to look at different sources depending on if you press a frontpanel button. It has a fallback mechanism to boot from flash when no other source (like tftp) is available.

Flash firmware (Image)
... aren't that easy anymore. Because NAND flash can contain bad sectors, everything is getting a bit more complex. We introduced a special format called "nfi", which contains a header (and possibly a crc) and 3 different partitions (loader, boot, root). You can flash this either with the bootloader directly (using a special HTTP client or using a browser), or using a special version of Dreamup. The good news are that you can flash even without a serial cable, you just have to interrupt the boot process by pressing a frontpanel key.
If you don't have network, or trashed your second stage loader, you can flash using only a serial cable.

Different Boot sources

The loader has the following boot sources:

source argument prefix for autoexec.bat
flash path into the first boot partition, usually starting with a /. example: "/autoexec.bat" for "/boot/autoexec.bat". /flash/
cf path into the first FAT[12|16|32] partition on the compact flash card /cf/
none not used. used to temporary disable boot sources -
stop not used. Used to enter the bootloader, for example for using the bootloader's web interface -
tftp [server:][bootfile] - server and bootfile will be taken from dhcp when not available (but can be overridden). /tftp/

 

Prerun
Prerun means that "/cf/autorun.bat" (sic!) will be executed before anything else. This can be useful if you, for example, want to put a flash upgrade app onto a CF card for upgrading a firmware without any other interaction.

Try Default Boot Sources
..just means that, when everything else failed, "/flash/zImage.elf" will be tried again. This is useful when you messed with your autoexec.bat...

Primary/secondary/Alternate boot sources
The "Primary bootsource" is the tried first (exception is "prerun", which comes even before). If this fails, the "secondary boot source" will be tried. (This can be useful to mimic the dbox2's boot behaviour: first try tftp, then flash. The reason for not defaulting to this is that the network init, including auto negotiation and DHCP timeouting takes several seconds.). The alternate boot sources can be enabled by pressing a key on bootup, either the "up" or the "down" key. "up" is alternative boot source 1, "down" the alternative source 2.

"Powerstate after AC loss"
Here you can setup what happens when you powered on the box with the hard-switch (or inserting AC power again). "as before", the most useful function, doesn't work yet. You can choose between "always on" and "always off".

 

sourcecodes and patches for GPL software elements