JM 8630C4 CATV Signal Amplifier Terrestrial Wave Enhanced Cable Digital Signal Replaces SB-8830FL9

JM 8630C4 CATV Signal Amplifier Terrestrial Wave Enhanced Cable Digital Signal Replaces SB-8830FL9

Description:
JM 8630C4 is suitable for LCD TV and digital TV, featuring adjustable 30DB high gain.

Home Cable TV Signal Amplifier:
- When the TV image is not good, it can reduce the snowflakes and improve the image clarity after zooming in
- When the signal strength of multiple TVs needs to be connected is insufficient, use the Seebest amplifier to amplify and then perform multi-channel branch distribution
- The use of computer graphic stock information receiving system can reduce the error rate of information and increase the receiving speed
- Imported CATV amplifier design, bandwidth 45-860MHZ; overall gain: 30±2dB
- Low noise, significantly improving signal quality
- Wide dynamic range, the input level is 35-75db uv
- Aluminum shell, good shielding performance, strong anti-interference ability and good heat dissipation
- The signal of each output port can be directly used by TV and computer, and can also be used for multi-channel branch distribution

Advantages:
- It adopts imported high-frequency amplifier design and low-noise circuit design
- Aluminum profile shell, high shielding performance, strong anti-interference

Key Parameters:
- Bandwidth: 45-860MHz
- Machine gain: 30±2dB
- Gain adjustment: 0-10dB
- In-band flatness: ±0.75dB
- Slope: 5dB
- Noise figure: ≤5dB
- Power consumption: 2W
- Output port: 4
- Dimensions: 133x76x37mm

Package Included:
- 1 x Set of CATV Signal Amplifier

FAQ:
1. What is the purpose of the amplifier?
a. The source of the cable TV signal is not good, causing the image to have snowflakes and unclear.
b. The same wired line is distributed and connected to multiple TV sets, and the signal strength distribution is insufficient.
c. After the cable TV signal in the living room or room is distributed by multiple channels, the signal is seriously attenuated.
d. The computer graphic stock information receiving system is used, which can reduce the information error rate and increase the receiving speed.
e. It can be used in homes, buildings, shopping malls, hotels, guest houses and other places.
f. Professional device design. Low noise. Broadband. Suitable for current cable and supplementary channels.

2. What is the difference between a home line and a building line?
Generally speaking, the most reasonable wiring method for a small number of household TVs is parallel connection. The building is connected in series. This is related to the power of the amplifier and the branch divider.

3. What is the difference between a splitter and a distributor? The difference between splitter and amplifier?
- The biggest difference between a splitter and a splitter is the output to the TV. The splitter output to the TV is the BR output port, and the splitter is the OUT output port. The OUT output port of the splitter is the output port that needs to be connected to the branch distributor. Because the attenuation of the OUT output port of the splitter is very small, it is used as a branch device of the main circuit to reduce the attenuation of the TV signal in the series line. Small, with the main amplifier to balance the signal in the entire line. The splitter can be connected, but the distributor cannot be connected. After the amplifier, connect a splitter to the TV. Only two or more can be connected to the TV. Please use a splitter in the middle.
- The distributor does not have an amplifying circuit, and does not have the ability to amplify signals. The distributor distributes the signal to each TV set to isolate the signal and minimize the signal interference between the TV sets. When the signal entering the home is not strong, and then distributed to multiple users, there will be a lot of snowflakes on the TV screen. This is a manifestation of insufficient signal. Just add an amplifier before the distributor, amplify it first, and distribute it. The amplifier has an amplification function, but does not have a distribution isolation function. When there are multiple TV terminals, it must be used together with the distributor. It is not necessary to connect the distributor in a TV terminal.

4. What is slope and equilibrium?
The level difference between the high and low frequency bands caused by the transmission of cable television signals through a certain length of cable, such as (the attenuation of the 45-750MHz high and low frequency bands is about 4 times different, that is, when the 45MHz frequency is attenuated by 5DB, the 750MHz frequency is attenuated by 20DB), Please adjust the slope and equalization buttons to make the amplifier output signal flat. TV programs are distributed in three sections of low, medium and high (L/H/U). For example, the programs in the L section are very clear, and the programs in the U section have snowflakes or stripes. This is the reason for the difference in high and low frequency levels. You can use the slope to adjust Improve them so that they are all the same sharpness, and then you can adjust the gain.

5. Installation and debugging of the amplifier
a. Install and connect the amplifier according to the equipment structure diagram (see the manual, at the back of the box), turn on the power, and the amplifier's power indicator should indicate normally.
b. Gain adjustment: Too low input level will degrade the carrier-to-noise ratio, and too high output level will cause distortion to increase. By adjusting the gain button, the amplifier output level will be between 94-102 dBμv.
c. Balance adjustment: In order to compensate for the level difference between the high and low frequency bands caused by the transmission of a certain length of cable, the attenuation of the 45-750MHz high and low frequency bands is about 4 times different, that is, when the 45MHz frequency attenuates 5dB, the 750MHz frequency Attenuation by 20dB), please adjust the equalization button to make the amplifier output signal flat.
d. The installation position of the amplifier is as far away as possible from the TV when the conditions allow (the distance here refers to the length of the amplifier to the TV line is generally more than 5M), close to the cable station splitter, and try to ensure that the signal source has a high signal-to-noise ratio. It is better to install at a position where the attenuation is not much and the image is clearer.
e. If the effect is not satisfactory after installation, please check whether the power supply is turned on and whether the connectors, distributors or branches are in good contact.
f. The oblique interference appears in the image after the signal is amplified, because the amplifier output level is too large and the signal intermodulation distortion is caused. You can adjust the gain button counterclockwise (for adjustable amplifiers), and appropriately reduce the amplifier output level to make the image clear. When the signal level of the user terminal is too weak or the signal distortion is too large, the signal can be enhanced after the amplifier is used, but the image effect is not significantly improved. At this time, the TV signal source at the front end of the home should be checked. The simple detection method of the signal source is in the cable A color TV is connected to the signal branch or distribution office. The image is clear and the signal source is okay. If the image is blurred, it means the quality of the signal source is poor, and the situation can be reported to the radio station.
g. Pay attention to indoor equipment. Waterproof and moisture-proof treatment should be done when used outdoors. It is best to use a field amplifier directly.