User manual

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Website:www.CCTVSecurityPros.com
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1.2.2 Basic working parameter
item parameter remark
Voltage input 19V
DC 19V。
Voltage outputfor
camera
12V（+/-0.2） 12V，1A(For D7704HT)
Video impedance
input
75Ω
75Ωeach channel。
Video output 1Vp-p 1Vp-p CVBS signal
I/O
0—2V Low voltage alarm
5V-30v Hight voltage alarm
RS232 serial port, for extend use
RS485
Connect to PTZ, (Pelco-D，Pelco-P)
SATA HDD One SATA with all capability
1.3 ENTIRONMENT ADAPTABILITY
For the softly using DVR and prolong device life, please pay attention on following detail：
1) When installing device, please comply all the electric product safety criterion；
2) Power and ground：
 Do not touch the power and DVR with a wet hand
 Do not drop liquid on DVR
 Do not put others on DVR
 Please using soft dry cloth when clean DVR, do not using chymistimpregnant
 When the power line connects with jack, even don’t startup device. There is still have
voltage
 If you do not use device for long time, please take the power line away from jack.