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- 300 MHz Processor
- Linux open source (most parts under the terms of GPL)
- Supports Linux Standard API
- 1 x DVB Common-Interface Slot
- 2 x Smartcard-Reader
- Integrated Compact Flash Interface Slot
- MPEG2 Hardware decoding (fully DVB compliant)
- TWIN Tuner, mixable, Plug&Play
- Tuner DVB-S, DVB-C und DVB-T, pluggable
- 10/100 MBit compatible Ethernet Interface
- USB Port
- 12V switch cinch
- V.24/RS232 Interface
- Big-size LC-Display
- 32 MByte Flash
- 128 MByte DDR-RAM
- integrated IDE UDMA66 Interface
- Support for internal HDD in any capacity
- unlimited channel lists for TV/Radio
- channel-change time < 1 second
- full automatic service scan
- supports directly bouquet-lists
- supports EPG (electronic program guide)'
- supports multiple LNB-Switching control (supports DiSEqC)
- fully adaptable OSD in many languages and skin-support
- S/PDIF Interface for digital bit stream out (AC-3)
- 2 x Scart-interfaces
- RF modulator
- Audio/Video cinch out
- MINI-DIN connector for extern IR (send)
available tuner module:
DVB-S-Tuner: TV and radio programmes with your dish
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

DVB-T-Tuner: TV and radio programmes with antenna
VHF-Channel: 2-12 (49...230 MHz)
UHF-Channel: 21-69 (470...861 MHz)
DVB-C-Tuner: TV and radio programmes over your
digital cable
Input frequency: 51...858 MHz
Symbol rate: 1 ... 7 Mbaud/s
Input impedance: 75 Ohm
Tuner In/Out connector: IEC
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, automatic assimilation
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
Footage 16:9, automatic assimilation for 16:9 TV-Device (over SCART)
Letterbox precolating 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-VHS over OSD selectable
VCR-SCART:
FBAS
Serial Interface RS 232:
Type 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, Connect to PC
USB:
USB 1.1 connector
Mini DIN:
I2C for stearing of external devices
IR function
Pins:
1 5V
2 SDA (I2C-Kanal 2)
3 SCL
4 3,3V
7 GND
8 IR-Output
9 GND
UDMA66 IDE Interface:
Intern for connect HDD
Compact Flash - Reader
LNB power and polarization per tuner:
LNB Current 500mA max. ; short-circuit-proof
LNB Voltage vertical < 14V without load, > 11,5V at 400mA
LNB Voltage horizontal < 20V without load, > 17,3V at 400mA
Count of active satellite position:
DiSEqC 1.0/1.2 SAT POSITION / SAT OPTION
DiSEqC - Rotor Control
Power consumption:
< 30W (in operation, horizontal polarization / 400mA LNB current)
< 25W (in operation, without LNB)
< 2W (Deep-Standby-Mode)
Input voltage:
230V / 50 Hz alternating acurrent +/- 15%
110V / 60 Hz alternating acurrent +/- 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
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Flashing a new firmware
(image)
Flashing a new firmware by
Browser
(then click here)
Flashing a new firmware by
Dream Up (then
click here)
User Manual DM7025 English (PDF)
(click here)
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".
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