Embeddable HD DVR | Model 4023

Model 4023 Embeddable HD DVR
  • Customizable user interface
  • Supports simultaneous HD recording to 2 USB devices
  • Captures JPEG snapshots without video interruption
  • Selectable HD or composite output for playback/preview
  • Wireless operation with external WiFi adapter
  • Real-time video overlay of date and time
  • MIC and stereo line audio inputs
  • Clock/calendar with battery backup


Model 4023 is a compact HD digital video recorder (DVR) designed for embedded OEM applications. It captures and records analog HD video (AHD, HD-TVI or HD-CVI) and stereo audio to USB storage media and can capture JPEG images on-the-fly without interrupting stream recording. It provides both DVI and composite NTSC/PAL outputs to allow live/recorded video and JPEG snapshots to be displayed on an external HD or SD monitor. Date and time are maintained by a real-time clock with battery backup. To implement a complete embedded DVR simply connect power, a keypad or keyboard and a USB storage device.

Simplified block diagram



To create a wireless DVR, simply plug a USB WiFi adapter into one of the board's USB ports. Sensoray offers approved WiFi adapters for this purpose (see Accessories tab for details). This allows phones, tablets and laptops to view video and control recording and playback, and also enables the DVR to be operated without a monitor or keypad, which saves space and reduces cost.

Stream formats

The board captures AHD, HD-TVI or HD-CVI video and compresses it to high-profile H.264. Audio from the external microphone or stereo line inputs is digitized and compressed using AAC encoding. The compressed A/V streams are multiplexed and recorded as MP4 files on a user-supplied USB storage device, with file names automatically generated by the real-time clock. Bit rates can be tailored to match application requirements and storage capacity.

Video overlay

The text overlay generator can position the current date and time anywhere in the video frame. The date and time text is automatically updated every video frame.

USB storage

An external USB storage device is required for DVR operation. If desired, a second USB storage device may also be connected and the 4023 will simultaneously record to both devices. A common application for this is recording to a removable device while creating an archival copy on a non-removable device. USB connectors are located on both sides of the board to facilitate connection to both removable and embedded storage devices.

User interface

The DVR user interface consists of an external keypad or keyboard working in conjunction with the board's flexible on-screen menu system. The keypad connector will directly interface to Sensoray's 4011TB solid-state keypad or your own custom keypad. In the latter case, each connector pin can be routed directly to any keypad switch and configured to match your keypad's control scheme. If preferred, a standard USB keyboard can be plugged into any USB port and used to control the DVR and also access special functions.


USB WiFi Adapters

Model 4023 has been specifically designed to work with the following USB WiFi adapters (Note: other WiFi adapters are not guaranteed to work with Model 4023):

Medium-range Adapter

Model WA0001 is a Wireless N USB adapter with a high-gain, omni-directional 5dBi antenna, and 802.11b/g/n wireless protocols.

WA0001 — Wireless N USB WiFi Antenna

WiFi Antenna

Short-range Adapter

Model WA0000 is a wireless USB nano network adapter with 802.11b/g/n wireless protocols.

WA0000 — WiFi Adapter

WiFi Adapter


Outputs DVI
NTSC/PAL, composite, 75 Ω
Inputs Line, stereo
Mono microphone
Output Line, stereo
Recorded formats
Resolution 1920 x 1080 @ 30 fps
Video compression H.264, HP @ L3
Video snapshot JPEG
Audio compression AAC
Output file format MP4
Keypad interface 9 GPIOs, reconfigurable
Power 12 V DC (± 4 V), 2.5 W
Operating temperature 0 to 50 °C
Mechanical dimensions 3.25 x 2.375 x 0.875 inches

Pricing & Ordering

Model Description Qty 1 Qty 2-9 Order Qty.
4023Embeddable HD DVRCallCall 
WiFi Adapters
WA0000Wifi adapter, USB-compatible, short rangeCallCall 
WA0001Wifi adapter, USB-compatible, medium range$27$27

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