Overview: The HRD-1642 is a 16-channel 4MP Analog HD DVR designed for high-performance video recording and monitoring. It supports various video input formats including AHD, TVI, CVI, and NTSC/PAL, with resolutions up to 2560 x 1440.

Display and Video: The DVR supports multiple screen displays (1/4/7/9/13/16/16A/PIP/Sequence) and offers live frame rates of 480fps (NTSC) and 400fps (PAL) across various resolutions.

Performance: Operating on embedded Linux, it uses H.264 and WiseStream compression. Recording rates reach up to 240fps for 4MP and 480fps for 1080p in NTSC, with slightly lower rates for PAL. Recording modes include manual, scheduled, and event-based, with pre- and post-alarm recording capabilities.

Search and Playback: Features include date/time and event search, fast and slow playback, and step forward/backward functions. Playback supports fast forward/backward speeds up to 64x.

Network: Supports IPv4 with a transmission speed of 15fps for 4M and up to 30fps for 1080p/720p. It allows up to 64Mbps bandwidth and supports multiple protocols including TCP/IP, DHCP, and RTSP. Remote monitoring is available via SSM, Web Viewer, SmartViewer, and mobile platforms (Android, iOS).

Storage: Accommodates up to 8 SATA HDDs internally and supports external storage via e-SATA and USB. Backup file formats include BU, SEC, and AVI.

Security: Features password protection for one admin and multiple user groups, along with data authentication via watermarking.

Interface: Includes VGA and HDMI outputs, audio inputs/outputs, alarm inputs/outputs, and various connection interfaces like Ethernet and RS-485. Supports multiple control protocols for PTZ and other devices.

General Specifications: Operates on 100-240 VAC with a maximum power consumption of 62W. The operating temperature range is 0°C to 40°C, with humidity levels between 20% and 85% RH. The unit measures 440 x 88 x 384.8 mm and weighs 5.67 kg.

Language Support: The GUI and web browser support multiple languages including English, French, German, Spanish, and more.

Key Features: Highlights include support for up to 16 audio channels, HDMI/VGA outputs, smartphone compatibility, and coaxial cable support for Pelco-C and ACP protocols.