Security First SDVS-1904 4 Channel Security DVR
The Security First SDVS-1904 security system consists of a Triplex DVR, 19 inch monitor and four surveillance cameras. With the DVR using H.264 video compression the bandwidth and storage requirements of the system are kept to a minimum. Regardless of this the system is equipped with a 250GB SATA hard disk, if you want to upgrade this there is no limit on the capacity for the new drive you choose to install.
You can select one of 6 set rates of compression while recording with the system helping you strike a balance between image quality and the usage of hard drive space. Being a Triplex DVR it has the ability to play back video from the attached surveillance cameras without interrupting any recording taking place. You can record smooth video at 30 frames per second when each camera attached to the system is simultaneously set to record.
At maximum the DVR can record video footage at 120 frames per second, the system can record in both NTSC and PAL modes. The DVR has a maximum recording resolution of 360*288 when recording in PAL and 360*240 in NTSC. While monitoring cameras attached to the system you can view the output from each one full screen, activating quad mode splits the image on the monitor into four sections so you can view each camera simultaneously. The monitor included with the system is a 19” LCD Active Matrix TFT with a maximum resolution of 1280*1024.
The DVR has the ‘Real Time Operating System’ (RTOS) installed, the user interface has eight different language settings including Chinese, English and German. When required you can update the operating system by networking the DVR, you can do this by connect ing it to your broadband modem through its Ethernet port. Networking the system allows you to take control of it from a remote location, networking the system also gives you further options for monitoring the attached cameras.
You can schedule a specific time that will determine when the DVR starts and stops recording, you can also attach up to four external alarms to the system, when these are triggered the DVR will start recording. Motion detection is built in to the system and this can also determine when the system starts and stops recording security camera footage. An RS-485 port is integrated into the DVR that allows you to attach PTZ cameras to the system. The four cameras included have a 1/3 CCD sensor with a 3.7mm fixed lens that is 92 degrees wide but they do not have PTZ functions.
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