Well known signal parts such as Sync, Burst and others do not exist here.

The high frequencies do not allow a signal evaluation by standard oscilloscopes or other standard video measurement tools. Only quite expensive HD-SDI analyzers and upscale HF - oscilloscopes could be used here. In most cases such equipment is not available at installation site.

For this reason a careful specification of the cable type is mandatory for system planning, especially in applications with long cable distances.

2.1.3 Cable types

The short description of HD-SDI signals above explains, why high frequency attenuation of the used video cable has a high influence on the achievable maximum cable length. Further on also the Return Loss of the coaxial cable and plug influences signal stability.

The standard RG-59 cable types - the most common in the CCTV industry - are originally designed for lower frequencies.

However, due to the new optimized receiver interfaces of EverFocus HD-CCTV equipment it is also possible to use standard RG-59 cable for distances of over 100m.

High quality, low loss RG-59 cable types allow distances up to 160m.

Longer cable distances can be achieved with low loss RG-6 or RG-11 type coaxial cables. Generally are cable types with 75 Ω impedance required.

Attenuation at 1 GHz: < 32 dB per 100m (328 feet)

Return Loss attenuation: > 20 dB

Impedance: 75 Ω

The table below gives an orientation for achievable cable distances:

Cable Type

Attenuation in dB at 1

Max. Cable distance in

 

GHz per 100 m / 328 ft

m

ft

 

 

 

 

RG-59

24 ~ 40 *

70 ~ 160

230~520

RG-6

15 ~ 35 *

100 ~ 190

330~620

RG-11, CATV-

8 ~ 16 *

180 ~< 250

590~<820

lowloss cables

 

 

 

* Low

quality cable may have higher attenuation

 

9

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Image 17
EverFocus EPHD08 user manual Cable types

EPHD08 specifications

The EverFocus EPHD08 is a highly respected surveillance solution designed for both commercial and residential applications. As part of EverFocus' lineup of security products, this device combines advanced technology with user-friendly features, making it a versatile addition to any security system.

One of the key features of the EPHD08 is its high-definition video recording capabilities. Supporting resolutions up to 1080p, this device ensures that users receive crystal-clear images, which can be crucial for identification and monitoring purposes. The enhanced video quality provides better clarity in both daylight and low-light conditions, ensuring reliable surveillance around the clock.

The EPHD08 utilizes H.264 compression technology, which is known for its efficiency in reducing file sizes without compromising image quality. This means that users can store more footage without the need for extensive storage solutions. The device also supports various storage options, including local storage via hard drives and cloud storage solutions, facilitating easy retrieval and management of recorded footage.

Another significant characteristic of the EPHD08 is its robust network connectivity. Equipped with Ethernet ports and wireless connectivity options, this surveillance system allows for seamless integration into existing networks. Users can remotely access their surveillance feeds through smartphones, tablets, or PCs, providing a convenient way to monitor their premises from anywhere in the world.

The EPHD08 is also designed with user experience in mind. Its intuitive interface makes it easy for users to navigate through the system settings and access recorded footage. With multi-channel support, users can monitor several areas simultaneously, enhancing security coverage across multiple premises.

Moreover, the device is built to withstand various environmental conditions, making it suitable for both indoor and outdoor use. The durable construction and weatherproof design ensure that the EPHD08 can operate reliably in different climates, providing peace of mind for users.

In summary, the EverFocus EPHD08 stands out with its high-definition recording, efficient H.264 compression, robust network capabilities, and user-friendly interface. These features, combined with its durability, make it an excellent choice for anyone looking to enhance their security infrastructure with a reliable and versatile surveillance system. Whether for a business or home, the EPHD08 offers a comprehensive solution to meet the demands of modern security needs.