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Posts posted by Opeth

  1. Hi i install one model AI HFW3541E-SA with sd micro card and i want to get notification through the gdmss. When i enable smatplan and go to ivs i set intrusion and if i uncheck the snapshot then i dont get the notifications on gdmss. Only when is click snapshot i get the messages? Why is that? I set the prompt type on gdmss on video but always get the snapshot when it is enable. If i unchecked the snapshot then i dont get it.

  2. Hi everyone.

    Yesterday i installed a system of 12 cameras hdcvi. I used dahua xvr5116hs-x, 2 hfw2241t-z-a, 1 hfw2241e-a and 9 hdw1200em-a, for cable i used cat6 23awg and video power baluns. My problem is that on the monitor (brand new monitor 1920x1080) shows waves on the cameras but from the application p2p it shows perfectly clear. My cable distance not exceed the 30 meteres the longer camera.  I checked the voltage on every camera and it is ok to 12,5vdc. My power supply is 12vdc 15 amp it is very enough.

    Can anyone help me with this?

  3. Im based in Cyprus. Usually i install 2mp hdcvi cameras over utp cat6 using video power baluns. But i want to try the rg59. I dont know if i had any problem with rg59 cca for 2 mp cameras but some clients ask for 4k cameras and the balun is up to 4-6 mp support and i think clarity over coax it will be better

  4. How i know if a cable is good quality?

    I can send you the specs of the cable i had and tell me your opinion


    • CSA: 0.5mm²
    • Conductor diameter: 0.8mmØ
    • Conductor material: Solid OFC
    • Braid: 48 x 0.12mmØ
    • Braid: material CCA
    • Dielectric: 3.7mmØ foam PE
    • Cable diameter: 6mmØ
    • Impedance: 75 Ohms
    • Capacitance: 67pF/m
    • Velocity factor: 83%
    • Power cable: 2 x 7/0.38mmØ (0.79mm²) bare copper, red/black
    • Max. current: 6A
    • Return loss 5-400MHz: 24dB min./100m
    • Return loss 450-1000MHz: 20dB min./100m
    • Return loss 1000-2150MHz: 16dB min./100m
    • Attenuation @ 5MHz: 2.8dB max./100m
    • Attenuation @ 50MHz: 5.1dB max./100m
    • Attenuation @ 100MHz: 7.3dB max./100m
    • Attenuation @ 200MHz: 10.1dB max./100m
    • Attenuation @ 400MHz: 14.9dB max./100m
    • Attenuation @ 860MHz: 22.1dB max./100m
    • Attenuation @ 1000MHz: 24.7dB max./100m
    • Attenuation @ 1750MHz: 34.1dB max./100m
    • Attenuation @ 2150MHz: 38.1dB max./100m
    • Colour: Black
    • Length: 100m