Thanks. Do you have instructions regarding the configuration to make it work? I connected the camera to the DVR and wasn't able to control the PTZ over coaxial cable, only through RS-485.
I followed the instructions (see attached image) and wasn't able to get it working:
I connected via RS-485 to the camera to verify that (in the camera's configuration menu) the COAXIAL CONTROL option was set to ON and the PROTOCOL-C set to HIK-C, I then set the protocol to HIKVISION-C on the DVR side and disconnected the RS-485 cables to see if the control over coaxial was working and nothing happened... I also tried selecting AUTO in the camera's menu and also nothing.
I don't think the DS-7208HQHI-
SH (Turbo HD 1.0) model is compatible with this function. The video input specification says "BNC interface (1.0Vp-p, 75 Ω)".
The DS-7208HQHI-
F1 (Turbo HD 3.0) video input specification says "BNC interface (1.0Vp-p, 75 Ω), supporting coaxitron connection" and explicitly indicates in its features that "Support HIKVISION-C protocol for connecting camera over coax;"
What do you think about this?