Weak current materials

The price difference between good weak materials and poor weak materials is very large. Taking HDMI as an example, the price difference ranges from tens to hundreds of yuan. If you choose to contract labor and materials, you must specify it in the contract. The brand and variety of the vulnerable material must be clearly defined. If the contractor cannot identify it, it is recommended that this material be contracted but not the material.

Although I made it clear during this renovation that I would use Category 6e cables for network cables and use Sun brand for all weak current materials, the decoration company still replaced all weak current products on the grounds that Sun brand did not have weak wires and the contract was not clear enough. The material made me have to buy new wires, which was a small expense but a big mistake.

1. Covered optical cable

2. One core, two ends and three steel wires

3. Single-mode single fiber

4. sc -sc jumper

5. Carrier grade

6. Support Gigabit network speed

Wepuda.

The currently more popular network deployment method is mesh deployment. There is no need to pull network cables from weak current boxes to each room. Instead, the host and clones are used for wireless connection. The wired and wireless networks required in each room are then connected. Just connect it to the clone, so the need for network cables has been greatly reduced than before.

1. Engineering cable

(1) The brand of the universe is amp

(2) Category 7, or Category 6A, 10 Gigabit network cable, 2019 For 5G in China, if it is not a 10G line, it is better to use wireless

(3) 8-core oxygen-free pure copper, the oxygen content is not more than 0.003%, the total impurity content is not more than 0.05%, and the purity of the copper is more than 99.95%.

(4) Double shielding with tin foil and braided mesh

There are three main types of braided mesh shielding wires on the market, 128, 160, and 192. The denser, the better

2. Finished product line

(1) The cosmic cow brand is Baoer Xingke

(2) All requirements for the engineering line

(3) The connectors are the best Shielded

(4) Choose the interface according to the actual situation. Try not to let the connector and the wire directly form a 90-degree angle. Over time, it will damage the wire body.

(5) The appearance of the wire includes round wire and flat wire, and the outer material includes braided wire, PVC, etc. There are also retractable wires to choose from

1. Engineering wire: amp< /p>

2. Finished product line: Baoer Xingke

Coaxial cables can be divided into baseband coaxial cables and broadband coaxial cables in terms of use, that is, network coaxial cables and video coaxial cables. There are two types of axial cables, or 50Ω baseband cables and 75Ω broadband cables. Home decoration generally should be the second type.

1. Video coaxial cable

2. Diameter base 1.0mm

3. Shielding layer base 4p shielding, that is, 2 layers of aluminum foil, 2 128-layer shielding net, preferably 5p shielding, that is, 3 layers of aluminum foil and 2 layers of shielding net

4. 128 net, 160 net, and 192 net are popular in the shielding net market. Depending on the 3D, 192 net is recommended.

Akihabara

I always find it weird that a merchant is using the name of a Japanese city, but seeing the rave reviews online and the technical indicators passing the test, forget it and buy it. .

Four cores are enough

USB cable buried tube is mainly used for two types of people. One is top gamers who need a large screen to play games and have high requirements for mouse accuracy. Second, there are fewer USB jacks on the front of the host, and multiple storage devices need to be operated at the same time.

But I am neither of the two categories. I am a person who has bad eyesight due to my age and cannot see clearly on the computer, so I have to control it remotely, and wireless control cannot be done.

As an aside, if the requirements for remote wireless gaming mice are not high, I personally think that XBox, G903, and MX master 2S are all pretty good.

The back of the USB data cable transmission panel (not the USB charging panel) has a direct connection, so you can just buy finished USB cables.

1. 3.0

2. Male to male

3. Data transmission speed 5Gbps

4. Shielding: aluminum foil + metal braid Net

5. Outer cover: environmentally friendly PVC

6. Wire diameter: 6mm

7. Connector: 16.5mm*35.5mm

Choose sgo 5-meter wire

I would like to talk more about the brand sgo. This brand sells many high-end loose wires with loose ends. You can cut off the length of a wire at will. , choose the connector you need, such as USB, DP, HDMI, and then DIY the cable you need. The quality of its cable can compete with that of Kaibol, a popular brand in the world. Top electricians can give it a try.

1. Bottom box

9cm deep, purchased at the same time when buying the panel

2. Panel

One to one interface, one pair , for the wireless output terminals of the mouse and keyboard; one pair of two-to-two interfaces is for the wired output terminals of the mouse and keyboard.

There are few brands of this product. I only saw three stores selling it online: Fuwa Switch Socket Store, Shanghai Stone Ground Socket, and Yazhi Intelligent Center. The first two sell Xinyi Stone, and Yazhi sells unlicensed ones< /p>

I chose an unlicensed one, and I think they are almost the same. They should have been soldered directly with accessories bought by the store.

As an aside, how do you differentiate between USB2.0 and USB3. 0, generally 2.0 is white or black, and 3.0 is blue, but the biggest difference is looking inside the connector.

2.0 has four pins

3.0 has nine pins

The USB internal socket has this kind of elbow

Consider The shortest connector to the finished line should be 35mm, so if you want to use this kind of elbow, it is best to buy a three-position base plate and put the jack on the top so that the connector can fit

Sometimes We have to choose direct plug. For example, when there are two USB plugs, one with an elbow and one with a straight plug, it is difficult to arrange the cables. Using two straight plugs perfectly solves the problem, but the depth of the bottom box needs to be at least 7.5cm, preferably 9cm. .

I chose straight plug for both single connector and double connector, mainly because I feel that the soldering technology of the elbow plug is really poor

1. ***Same points

(1) The popular domestic brands are Kaibol and Baoer Xingke

(2) There are two types of materials, ordinary HDMI and optical fiber HDMI. It is best to use optical fiber. The ordinary material 2.0HDMI is really too It's thicker and the head is too big.

(3) Display technology

4k, 3D, version 2.0, bandwidth 18Gbps, refresh rate 60Hz, 10bits, support HDR, TMDS technology

(4) Sound technology

Supports ARC audio return, supports 5.1 and 7.1 channels

(5) Connector technology

Supports tens of thousands of hot-swappable times, gold-plated ports, Zinc alloy shell, blue rubber core anti-oxidation

SIG fiber optic connector

Kaibol ordinary connector

Kaibol ordinary connector

Kaibol fiber optic connector Connector

(6) Outer protection

Based with flame-retardant PVC, better is braided mesh

2. HDMI cable

(1) Wire core

19 cores, 24AWG (the smaller the value, the better), single wire diameter 0.51mm, total wire diameter 10.5mm

(2) Material

< p> HDMI with better materials, conductors, electronic wires, and shielding net are all silver-plated. Ordinary HDMI, the conductor is tin-plated

(3) Shielding protection

4 layers of metal shielding, effectively preventing electromagnetic interference

(4) Electrostatic protection

p>

5 sets of fully silver-plated ground wire protection, effectively preventing static electricity

3. Optical fiber cable

(1) The difference between optical fiber HDMI and ordinary HDMI

< p>(2) Wire

The total wire diameter is less than 4.8mm, 4 optical and 7 copper

(4) Connector

Sig’s connector has a buckle. Khyber is gone.

(5) Wire appearance

No matter which brand, optical fiber cables all use PET braided wires,

Kaibol, the invincible HDMI brand in the universe

1. 3-meter cable

Kaibol T sequence:

The web page shows that the following products are sent, but I changed it to send two conversion plugs for each cable, no cable required.

2. 5-meter cable

Kaibol optical fiber

1. Wiring

(1) The inner diameter of the wire tube should not be less than 25mm

(2) The connector part and the wire cannot be at a 90-degree angle to prevent damage to the wire. Please use an adapter elbow

(3) When decorating and wiring, wear a dust cap on the connector and wrap it with waterproof glue.

(4) Please do not pull hard when unwinding, uncoiling, or inserting the tube, let alone twisting or robbing.

2. Back box

The HDMI panels I choose are internal elbows, and the back box requires 75mm depth.

3. Panel

I really want to choose Siemens, a high-end product costing more than 300 yuan, but please appreciate the Siemens panel.

We soldered 25 optical fiber cables ourselves. The worker we hired had never even heard of HDMI. Can we still expect him to solder them? I silently found a brand-name store and bought a direct-plug type to solve the problem.

The three miscellaneous brands still chose Yazhi. A *** requires three pairs, five of which are with elbows and the other is a floor plug.

For a base plate with an elbow, considering the connector problem, you still have to buy a 3-position one, with the plug on the top.

There are two types of ground plugs: spring and open cover. Since the HDMI cable is hard and thick, and the connector is long, the measured spring switch ground plug may affect the switching efficiency, so open the cover is selected.

The jack of the open cover model always faces the ground. There are certain safety risks when installing strong electricity, so there are no additional five holes.

There are also problems with direct plugging. The HDMI connector is more than 40 centimeters long.

Finally, choose the three-position elbow to lean on

One more word here, for those who care a little, generally the strong power ground plug will go alone. In the event of weather disasters such as typhoons, rainstorms, etc., the ground plug needs to be turned off separately.

Audio and video technology has developed rapidly in the past five years, and the website is full of these terms. Let’s popularize them here

1. UHD

Ultra High Definition is also called 4k

Resolution: 3840×2160 (4K×2K)

2. FHD

Full High Definition

< p> Resolution 1920X1080

3. HD

High Definition

Resolution 1280X720

4. TMDS

Transition modulation of differential signals, which means that audio lines that use this technology have smaller signal losses

5. AWG

American wire gauges, such as 24AWG, 26AWG, Indicates the number of holes that the wire must pass through before forming its final diameter. The larger the value, the more holes the wire passes through and the smaller the diameter of the wire.

6. HDR

High dynamic range image, High-Dynamic Range. Compared with ordinary images, it can provide more dynamic range and image details. According to the LDR (Low-Dynamic Range) images of different exposure times, the LDR image corresponding to the best detail at each exposure time is used to synthesize the final HDR image. , can better reflect the visual effects in the real environment.

7. DP interface and MiniDP

DP1.4 will support 8K resolution signal transmission and is compatible with USB Type-C interface, which can transmit data and audio and video, and the bandwidth can be Up to 32.4Gbps, it can support 4K120Hz output with 10-bit color and 8K60Hz output. Supports forward error correction (FEC), HDR metadata transmission and extended audio transmission (32-bit audio channel, 1536kHz sampling rate and all currently known audio formats)

One day, DP will replace HDMI, Complete the transmission and integration of data, audio and video, so when purchasing new audio and video computer equipment, it is recommended that it must have a DP interface, although DP is not widely used now.

The indicators of weak current boxes generally lag behind those of wires, and many of them will become bottlenecks for wires. However, this thing is outside and can be replaced at any time when it is updated.

1. Iron plate thickness, 1.2mm base

2. Components: patch panel, fiber optic board, telephone line branch, coaxial line branch, network branch, and transformer Voltage module, some weak current box distribution fan, I think it is not very necessary.

3. Coaxial line branch module:

One in and four out. Almost no manufacturer provides technical specifications.

4. Telephone line module

One in and four out. Almost no manufacturer provides technical specifications

5. Network module

There is no 10G network module found on the entire network. It is true that the update speed of accessories is relatively slow, but fortunately, this thing is relatively easy to replace. Let’s wait and see again in a few months.

6. Transformer module

Serving the network module

Hongyan weak current box household set multimedia centralized wiring information box module concealed fiber optic home distribution box

1. Set-top box

Specifications:

21*6.5*3.5cm, please leave out the rear plug (3.5cm) and the side TV card (protruding 1cm ) location

Input:

From the weak current box, home coaxial line input

From the optical modem, network line input

< p> Output:

HDMI output TV

Power supply:

One power cord with transformer, double-ended socket

Transformer size : 8*4.5*4.5cm (excluding plug)

2. Optical cat

Specifications:

10cm*5.8cm*2.5cm

Input:

From weak current box, optical fiber input

Output:

Network cable output router

Network cable output set-top box

Power supply:

One power cord comes with a transformer and a double-ended socket

Transformer size: 4.8*2.5*4.5 cm (excluding plug)