Dvbs-evb-kd1100hd-v1.1 May 2026

It looks like you’re asking for a feature overview of a device with the PCB/model marking:

DVBS-EVB-KD1100HD-V1.1

From the naming convention, this appears to be an evaluation board (EVB) for a DVB-S (satellite) receiver or demodulator, likely based around a KD1100HD chipset (possibly from Montage Technology or a similar DVB-S2/S2X demodulator IC).

Here is a typical feature set for such a board (based on common DVB-S2 demodulator EVBs): dvbs-evb-kd1100hd-v1.1

Introduction

The model identifier DVBS-EVB-KD1100HD-V1.1 denotes a specific revision of an evaluation board (EVB) for a DVB-S (Digital Video Broadcasting – Satellite) receiver, supporting high-definition (HD) decoding. Designations like this are common in the lifecycle of set-top box (STB) chipsets, where “KD1100HD” likely refers to a main SoC (System on Chip) or tuner/demodulator combination, and “V1.1” indicates a minor revision after initial prototyping. Such boards serve as reference designs for manufacturers, allowing software development, performance validation, and certification before mass production.

4. Communication (I2C)

• I2C Addresses (typical):
  • Tuner (e.g., RDA5815): 0xC0 (write) / 0xC1 (read)
  • Demodulator (NT6867): 0x60 / 0x61
• Use i2cget / i2cset (Linux) or any MCU with I2C to initialize the demod and tune frequencies.

Development & debugging interfaces

• UART serial console (usually 115200 8N1) — kernel boot messages, shell
• JTAG for low-level debugging and flashing
• Boot selection pins (e.g., to force recovery or UART boot)
• SWD or other vendor-specific debug headers
• USB mass-storage boot or firmware loader utilities

Essay: The DVBS-EVB-KD1100HD-V1.1 – A Study in Legacy DVB-S Hardware Design

Hardware Architecture (Inferred)

A typical DVB-S EVB from the HD era (circa 2010–2015) would include:

1. Front-end: A tuner (e.g., from Silicon Labs or MaxLinear) covering 950–2150 MHz L-band, followed by a DVB-S/S2 demodulator (e.g., STV090x). This converts the satellite LNB signal into a TS (Transport Stream).
2. Main Processor (KD1100HD): Likely an ARM-based or MIPS-based SoC with an integrated MPEG-4 AVC/H.264 hardware decoder for HD video (1080i/720p). The “KD” prefix may point to a Korean or Chinese semiconductor brand.
3. Memory & Storage: DDR2/DDR3 SDRAM for decode buffers, plus NAND or SPI flash for bootloader and firmware.
4. Interfaces: HDMI output, composite video, stereo audio, USB for PVR (recording), Ethernet (for hybrid IP/satellite), and an F-type LNB input with DiSEqC 1.0/2.0 control.
5. Power & Layout: V1.1 suggests improved power sequencing, better EMI shielding, or corrected LNB supply circuitry from an earlier V1.0.

3. Powering the Board

• Apply clean 3.3V to the main logic rails.
• LNB output (13/18V) is not generated on‑board – you need an external LNB supply circuit (e.g., based on MT312 or discrete boost converter).
• Current draw: ~150–200 mA at 3.3V (demod + tuner active).

Likely Features

1. Demodulation

   • DVB-S, DVB-S2, possibly DVB-S2X
   • QPSK, 8PSK, 16APSK, 32APSK
   • Symbol rate: wide range (e.g., 1–45 Msps)

2. Tuner Interface

   • Connects to an external satellite tuner module (e.g., via I2C and IF input)
   • Often includes an onboard tuner or header for a tuner daughter card

3. Host Interface

   • USB 2.0/3.0 (common for PC-based DVB-S2 receivers)
   • Or TS (Transport Stream) parallel/serial output for external encoders

4. Physical Connections

   • F-connector (LNB input)
   • GPIOs, LEDs for status
   • I2C, SPI, or UART for control/debug

5. Power

   • USB-powered or external DC jack
   • LNB power output (13/18V, 22kHz tone) for dish control

6. Additional

   • Blind scan support (often)
   • Low power consumption
   • Driver support for Linux (DVB API) / Windows

4. Software and Driver Support for dvbs-evb-kd1100hd-v1.1

For open-source enthusiasts, getting this board to work under Linux is the ultimate goal. It looks like you’re asking for a feature