Xhdata D-808 Schematic [top] Direct

While a full official schematic for the XHDATA D-808 is not publicly released by the manufacturer, hobbyists and radio enthusiasts have extensively documented its internal architecture through teardowns and reverse engineering. Core Architecture and Components XHDATA D-808 Go to product viewer dialog for this item.

Design details:

2. Online Forums and Communities

• Reddit: Subreddits related to shortwave radio, SDR, or electronics might have users who have experience with the D-808. They might share information, point you to resources, or offer advice.
• Groups.io or Yahoo Groups: There are specific groups dedicated to SDR and shortwave radio where members share knowledge and resources.

1. The Main Controller: Silicon Labs Si4735-D60

The heart of the D-808 is the Silicon Labs Si4735 DSP chip. This is the same chip found in the Tecsun PL-330 and PL-990. Luckily, Silicon Labs publishes the official datasheet and application notes for the Si4735 (easily found via PDF search). This datasheet acts as a pseudo-schematic for ~70% of the D-808's functionality, including: xhdata d-808 schematic

5. Mix and output stage

• Mixer: passive or active summing stage combining the voice outputs. Active mixer typically uses one or more op-amps configured as summing amplifiers with individual level pots ahead.
• Master tone and output EQ: a single band-shaping network or simple high/low cut filters.
• Output buffer: op-amp buffer driving 1/4" or 3.5mm output jack; coupling caps for DC blocking.
• Headphone or line-level switch may be present with simple attenuation.

While a formal, factory-issued service manual with a full schematic for the XHDATA D-808 While a full official schematic for the XHDATA

1. Official Source (Limited)

• XHDATA official website – They do not list schematics for public download. Contact their support directly: support@xhdata.com.tw
  Request it as a service technician for repair purposes.

receives the analog RF signal, performs high-frequency analog to medium-frequency conversion, and applies user-selected bandwidth filters (ranging from 1kHz to 6kHz for AM/SSB). Audio Output: The DSP outputs an approximately 80mVrms signal . In the D-808's design, this is fed into the Reddit: Subreddits related to shortwave radio, SDR, or

The XHData D-808 is a compact, portable digital radio that supports multiple frequency bands, including shortwave, FM, and AM. It's known for its excellent reception, compact design, and user-friendly interface. The device is based on the SDR (Software Defined Radio) technology, which allows for flexible and upgradeable firmware.