Ajax NVR DC (8ch)
- CCTV Lens Guide
- Hard Drive Size Guide
Unless selecting a vari-focal camera (with an adjustable lens) It is important to select the correct camera lens option for where the camera is to be positioned. A smaller lens will give you a wider angle but will be "zoomed out more", while a bigger lens will narrow the angle down and "zoom in more". See below to give you some idea on angles of Megapixel HD Cameras:
| Lens in mm | Approx Viewing Angle (degrees) | Ideal Distance (metres) | Typical usage/notes |
|---|---|---|---|
| 2.8 | 106 | <6 | For seeing as much of the immediate area as possible such as above a doorway/low down/garage soffits (edges can appear slightly warped/distorted) - clearly "zoomed out" |
| 3.6/4 | 83-90 | <12 | A great general purpose option giving great coverage still in the corner of a room or higher up on second floor soffits with less distortion - more of a natural "zoom" |
| 6 | 56 | 6-20 | Narrows down the angle and zooms in to look past the immediate area a little to gain more detail - down a driveway for example from higher up |
| 12 | 24 | 20+ | Zooms in significantly more to look at a gate, entrance or adjascent building |
| 16 | 19 | 24+ | As above but more so |
The amount of hard drive space you require is dictated by how many cameras, as well as their resolution and frame rate settings. Finally you can often make your storage space last a lot longer by enabling motion detected recording rather than continuous, especially if there are long periods of no activity.
|
Resolution (Megapixels) |
Days of storage provided by 1TB per camera (continuous - full 25 frames per second) |
Days of storage provided by 1TB per 4 cameras (continuous - full 25 frames per second) |
Days of storage provided by 1TB per 4 cameras (50% motion- 15 frames per second) |
|---|---|---|---|
| 1 | 44 | 11 | 36 |
| 2 | 22 | 5 | 18 |
| 3 | 17 | 4 | 14 |
| 4 | 11 | 3 | 9 |
| 5 | 9 | 2 | 8 |
| 6 | 8 | 2 | 6 |
| 8 (4K) | 5 | 1 | 4 |
| 12 | 4 | 0.5 | 3 |
As a rule of thumb we recommend a minimum of 2 Terabytes per 4 x 2-4MP HD cameras, as this should give you 2 weeks to a month with a few adjustments on motion detected recording. You may only require the full 25 frames per second on certain cameras if things are fast moving.
(All of our hard drives come fitted and are CCTV specific from one of the major brands)
Video stream
NVR models
8-channel
With up to 4K resolution (25/30 FPS).
IP cameras
- ONVIF (Profile S/T)
- RTSP
- Storage
hard drive with a capacity of up to 16 TB (SATA connectivity, 3.5” size)
HDD is not included. A hard drive with power consumption of up to 7 W can be connected.
Decoding formats
H.265 H.264
Bandwidth
up to 100 Mbit/s
Communication channels
Ethernet
up to 100 Mbit/s
Bluetooth
BLE frequency band: 2.400–2.4835 GHz
To set up an Ethernet connection.
Radio signal power
2.5 mW (with the 100 mW limit)
Key features
Motion detection
NVR DC features built-in software to detect movement in the frame. It is possible to switch between image analysis by NVR DC or camera algorithms in an Ajax app.
In-app video management system
- Video wall that combines images from all connected cameras.
- Event filters.
- Timeline with smooth preview.
Visual verification of Ajax alarms
NVR DC allows for setting up a scenario in which Ajax detectors trigger specific cameras to start recording. The result is immediately delivered to mobile and desktop apps.
Support for ONVIF authorization
Profile S
Profile T (partially)
Ajax cameras and NVRs can be integrated into third-party video management systems (VMS).
Access rights distribution for users in mobile apps and for monitoring company operators in PRO Desktop.
Power supply
Without an installed jumper on the PSU board
- 8–16 V⎓, up to 4 A
- 8 V⎓ — turn-on threshold when the voltage rises
- 6.5 V⎓ — turn-off threshold when the voltage drops
With an installed jumper on the PSU board
- 12.1–16 V⎓, up to 4 A
- 12.1 V⎓ — turn-on threshold when the voltage rises
- 10.35 V⎓ — turn-off threshold when the voltage drops
Power consumption
up to 24 W
Clock battery
CR2032 battery, 3 V
Only to power the system clock.
Sabotage protection
Tamper alarm
Notifications of an attempt to detach the device from the surface or remove it from the mounting panel.
Enclosure
Dimensions
193 × 193 × 47 mm
Weight
583 g
Without a hard drive.
Operating temperature range
from 0 °C to +40 °C
Operating humidity
up to 75>#/p###
Protection class
IP20
