#HDMI encoder modulatorencoder modulator16in1 digital headendmodulatorHD RF modulator SOUKAsoukacatv

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What are the differences between analog TV and digital TV? | Soukacatv.com

About the analog TV and digital TV, we found the differences are as follows:

Digital TVs are beginning to gain widespread acceptance all over the world while analog TVs are slowly disappearing. The primary difference between these two types is with the signals that they can process. Analog TVs are restricted to analog signals while Digital TVs can process digital signals and analog signals.

Since analog TVs can only process analog signals, it is also quite prone to the problems that analog signals experience. Problems like noise, interference, and even distorted displays are very common in analog TVs. Though digital TVs can still be affected by these problems if the signal is also analog, switching to a digital signal almost eliminate it.

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Analog TV sets use cathode ray tubes as their display while digital TV sets use flat panel display like LCD, plasma, or LED. Consequently, analog TV sets are big and bulky compared to digital TV sets. Analog TVs also consume a lot more power compared to digital TVs.

Digital TV sets can be in 480p or more commonly known as SD or even in 780p or 1080i/p which is known as HD or high definition. HD makes it possible to increase the size of the TV sets without compromising the quality of the image on screen. Analog TV sets use the standard definition. Though there have been attempts to implement HDTV analog sets at first, the requirements in terms of bandwidth were just too great for it to be feasible.

Analog TVs are usually limited to sizes of below 30 inches because creating much larger screens pose greater challenges without any real gains in the image quality. Digital TVs have been growing since they were made and screen sizes of over 50 inches are now quite common.

There are still some benefits that you can get with analog TVs that are mostly due to its use of CRT. Analog screens have a very fast response time making it excel in showing fast motion videos. Analog TVs also have better contrast compared to most digital TVs. There might still be advantages for analog TVs, but developments in technology have begun to improve on the shortcomings of digital TVs.

Summary:  1. Analog TVs can only accept analog signals while Digital TVs can accept both digital and analog signals  2. Analog TVs are prone to noise and distortion while Digital TVs are not  3. Analog TVs are usually made with CRT displays while Digital TVs use flat panel displays  4. Digital TVs can be in HD while analog TVs can only be in SD  5. Analog TVs are restricted to under 30 inches while Digital TVs above 50 inches are already common  6. Analog TVs have advantages over digital TVs that are largely related to the CRT

Established in 2000, the Souka (DSW) main products are modulators both in digital and analog modulators, amplifier and combiner. We are the leading communication supplier in manufacturing the headend system in China. Our 16 in 1 and 24 in 1 now are the most popular products all over the world. For more, please access to https://www.soukacatv.com/.

Source: differencebetween

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【PAL DK Headend Modulator 16 In 1 at Soukacatv.com】The SK-16B is desinged for PAL DK market only. It contains 16 pcs mini fixed skip channel modulator cards and with combiner output.It is extremely cost-saving headend for small facility such like hotel ,hospital ect..For more, please access to https://www.soukacatv.com/pal-dk-headend-modulator-16-in-1_p32.html.

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【Adjacent Channel 16 In 1 Analog Headend For Hotel Cable TV System at Soukacatv.com】The SK-16M is a 4RU rack mounted chassis that allows for installation of up to 16 pieces microprocessor-controlled fixed mini-modulators.Built-in active combiner eliminates unnecessary cabling and potential connection problem and ensures high output level . All modulators are perfect factory set to desired channel and proper offset.For more, pleaseaccess to https://www.soukacatv.com/adjacent-channel-16-in-1-analog-headend-for-hotel-cable-tv-system_p9.html

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Digital TV Modulator Market 2018 Competitive Landscape Research Forecast to 2023

Global Digital TV Modulator Market report provide emerging opportunities in the market and the future impact of major drivers and challenges and, support decision makers in making cost-effective business decisions. The Digital TV Modulator market 2018-2023 report assesses key opportunities in the market and outlines the factors that are and will be driving the growth of the Digital TV Modulator industry.  

Digital TV Modulator Market report includes the company profile, product specifications, capacity, production value, and market shares for each company. Digital TV Modulator Market contains capacity, production, production value, cost/profit, supply/demand, import/export, Market Forecast, Analysis of Industry Chain Structure, Economic Impact, Market Dynamics, and Proposals for New Project.

HDMI Encoder Modulator,16in1 Digital Headend,HD RF Modulator at https://www.soukacatv.com/.

TOC of Digital TV Modulator Market Report Covered:

Chapter 1: Introduction of Digital TV Modulator Industry 1.1 Brief Introduction of Digital TV Modulator 1.2 Development of Digital TV Modulator Industry 1.3 Status of Digital TV Modulator Industry

Chapter 2: Analysis Key Manufacturers in Digital TV Modulator Market 2.1 Company Profile 2.2 Product Information 2.3 2012-2018 Production Information 2.4 Contact Information

Chapter 3: Market Status of Digital TV Modulator Market 3.1 Market Competition of Digital TV Modulator Industry by Company 3.2 Market Competition of Digital TV Modulator Industry by Country (USA, EU, Japan, Chinese etc.) 3.3 Market Analysis of Digital TV Modulator Consumption by Application/Type

 Chapter 4: Global and Chinese Economic Impact on Digital TV Modulator Market 4.1 Global and Chinese Macroeconomic Environment Analysis 4.1.1 Global Macroeconomic Analysis 4.1.2 Chinese Macroeconomic Analysis 4.2 Global and Chinese Macroeconomic Environment Development Trend 4.2.1 Global Macroeconomic Outlook 4.2.2 Chinese Macroeconomic Outlook 4.3 Effects to Digital TV Modulator Market

 The Digital TV Modulator market 2018-2023 report highlight the economy, past and emerging trend of industry, and availability of basic resources. Furthermore, the Digital TV Modulator market report explains development trend, analysis of upstream raw materials, downstream demand, and current market dynamics is also carried out. In the end, the report makes some important proposals for a new project of Digital TV Modulator market before evaluating its possibility.

 Established in 2000, the Soukacatv.com (DSW) main products are modulators both in digital

and analog modulators,amplifier and combiner. We are the leading communication supplier in

manufacturing the headend system in China. Our 16 in 1 and 24 in 1 now are the most popular

products all over the world. For more, please access to https://www.soukacatv.com/.

 Source: https://faircolumnist.com/digital-tv-modulator-market-2018-key-profiles-driver-outlook-competitive-landscape-research-forecast-to-2023/

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RF Modulators Market Growth Prospects, Key Vendors, And Future Scenario & Outlook To 2023 | Soukacatv.com

HTF MI released a new market study on Global RF Modulators Market with 100+ market data Tables, Pie Chat, Graphs & Figures spread through Pages and easy to understand detailed analysis. At present, the market is developing its presence. The Research report presents a complete assessment of the Market and contains a future trend, current growth factors, attentive opinions, facts, and industry validated market data. The research study provides estimates for Global RF Modulators Forecast till 2025.

Important Features that are under offering & key highlights of the report :

1) What all companies are currently profiled in the report? Following are list of players that are currently profiled in the the report “Synergy Microwave Corporation, Advanced Microwave Inc, Analog Devices, Crane Aerospace & Electronics, G.T. Microwave, Inc, Integrated Device Technology, L3 Narda-MITEQ, Linear Technology, MACOM, Mini Circuits, Planar Monolithics Industries, Polyphase Microwave, Qorvo, SAGE Millimeter, SignalCore, Sirius Microwave, Skyworks, Teledyne Cougar & Teledyne RF & Microwave”

** List of companies mentioned may vary in the final report subject to Name Change / Merger etc.

2) Can we add or profiled new company as per our need? Yes, we can add or profile new company as per client need in the report. Final confirmation to be provided by research team depending upon the difficulty of survey. ** Data availability will be confirmed by research in case of privately held company. Up to 3 players can be added at no added cost. 3) What all regional segmentation covered? Can specific country of interest be added? Currently, research report gives special attention and focus on following regions: North America, United States, Canada, Mexico, Asia-Pacific, China, India, Japan, South Korea, Australia, Indonesia, Singapore, Rest of Asia-Pacific, Europe, Germany, France, UK, Italy, Spain, Russia, Rest of Europe, Central & South America, Brazil, Argentina, Rest of South America, Middle East & Africa, Saudi Arabia, Turkey & Rest of Middle East & Africa ** One country of specific interest can be included at no added cost. For inclusion for more regional segment quote may vary.

4) Can inclusion of additional Segmentation / Market breakdown is possible? Yes, inclusion of additional segmentation / Market breakdown is possible subject to data availability and difficulty of survey. However a detailed requirement needs to be shared with our research before giving final confirmation to client. ** Depending upon the requirement the deliverable time and quote will vary.

The in-depth information by segments of the Global RF Modulators market helps monitor future profitability & to make critical decisions for growth. The information on trends and developments focuses on markets and materials, capacities, technologies, CAPEX cycle and the changing structure of the Global RF Modulators Market.

Established in 2000, the Soukacatv.com (DSW) main products are modulators both in digital and analog modulators, amplifier and combiner. We are the leading communication supplier in manufacturing the headend system in China. Our 16 in 1 and 24 in 1 now are the most popular products all over the world. For more, please access to https://www.soukacatv.com/.

Source: thehonestanalytics

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【16in1 Agile Modulator,CATV Headend Agile Modulator at Soukacatv.com】Most of the hotels will use the cable TV system to distribute by the coax network to a set-top box in each room or to the TV with tuner inside. There are two kinds of cable TV system. One is analog system and the other is digital system. In the past 20 years, analog system is overwhelm the digital system with the low installation cost. However, with the development of techonology, now the digital system cost has been brought down almost same as the analog system. For more, please access to https://www.soukacatv.com/hotel-tv-system_n13.

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【Off-Air Signal And QAM Digital Modulator For USA Market at Soukacatv.com】The SKD2618 encoder modulator is designed to convert ASTC off-air signal to RF signal. It's the most cost-effective and simple-installation encoder modulator to distribute the 1080P full HD video signal over the existing coax cables.For more, please access to https://www.soukacatv.com/off-air-signal-and-qam-digital-modulator-for-usa-market_p33.html.

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【HD Encoder To ISDB-T RF Modulator at Soukacatv.com】The SKD2715 HD to RF modulator is designed for hotel cable TV system. The modulator will convert the HD signal into the RF signal to your current coax system. It not only can work with the base unit of SKD2700M, but also work stand-alone.For more, please access to https://www.soukacatv.com/hd-encoder-to-isdb-t-rf-modulator_p35.html.

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【DVB-T And ISDB-T Encoder Modulator at SOUKA】The SKD2036C is a wall mounted digital modulator, which works by offering the incoming HD signal or CVBS signal into the H.264 encoder and output as a standard DVB-T or ISDB-T RF signal. With the easy front panel control you can set up the system in minutes, which we also provide setting up by our Android and iOS APP.  For more, please access to https://www.soukacatv.com/dvb-t-and-isdb-t-encoder-modulator_p40.html.

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【Single HD To RF MEPG2 ATSC/QAM Modulator】The SKD2618 is a professional quality digital modulator, designed in 2RU dies-cast case. It can distribute video in nearly any resolution from an unencrypted HDMI source up to 1080P into a private television channels. The encoder inside also support closed captions via the CVBS input. With the easy front panel control you can set up the system in minutes, which we also provide setting up by our Android and iOS APP. For more, please access to https://www.soukacatv.com/single-hd-to-rf-mepg2-atsc-qam-modulator_p41.html.

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For more, please access to https://www.soukacatv.com/.

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What is ENCODER? In Telecommunications, it is a device used to  change a signal or data into a code.

What is MODULATOR? In Telecommunications,it is a device to  transfer a digital bit stream over a bandpass channel.

In traditional digital cable system,one encoder requires one  modulator,or with the help of multiplexer, several encoders go with one multiplexer and one digital modulator. But this is no the smart way for hotels or hospitals in cost and setting up the system.What people  really wants is a device integrated the encoder and modulator into  one and simply without much unnecessary setting. And that is what  we gonna do.

Our SK-860** is a new generation encoder-modulator designed for the subscribers who want simple and quick  roll-out. It only takes 3 steps to set up a private cable system.

For more, please access to https://www.soukacatv.com/ .

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How Does Signal Modulation Work? | soukacatv.com

To understand how wireless data transfer happens, we need to understand: •  What is frequency? •  Message / Data Signals •  time representation •  frequency representation, and why is it important? •  How do filters work? •  FCC Communication bands •  Modulation and demodulation

You can spend years at University learning these subjects in depth (or on Wikipedia, if that’s your style!). This is designed to be a flash flood of knowledge. This was originally put together as a PowerPoint for non-EE students in my senior project group who were curious about our lingo when we talk about “900 MHz” or “2.4 GHz” or “Frequency Hopping”. As such, it is not complete, thorough, and skips many details that one would include in a professional analysis of a system. This is only to provide a concept of wireless transmission.

What is Frequency?

Frequency is the unit describing how often something oscillates, or goes back and forth. Units are Hertz (Hz), or the inverse of a second. Something oscillating 60 times per second has frequency 60 Hz. For our purposes, we are going to focus on audio waves (oscillation of air pressure) and how it gets broadcasted from a radio station to your car in the range of hundreds of kilohertz (or any AM radio station). Any wave has a frequency – light, for example. Generally light and other higher frequency waves (e.g. x-rays, gamma rays, microwaves) are represented by their wavelength, not frequency. For example, green light is around 400 nanometers. Here is a picture showing the relationship of units on a traveling wave:Basic units of a sine wave.

Assuming constant speed of the signal, wavelength and frequency are interchangeable. That is outside the scope of this article, though. Message Signals of Varying Complexity

Sending a signal that is a pure sine wave is called a “tone”. It carries no real information, and doesn’t sound that great either. Here is an image of a sine wave, with time on the X axis and voltage on the Y axis. This is 150 Hz for reference.

Single tone signal (time domain)

Okay, so why am I showing you this? Let’s take a look at increasingly complex signals in the time domain. Here is a two tone signal (two tones, added together). It is the same sine wave above, added together with another sine wave with twice the frequency, 300 Hz.

Dual tone signal (time domain) How about a signal composed of many tones of varying frequencies:

Multi-tone signal (time domain)

It’s starting to get a bit hairy. The only real information you can gather from that is voltage level at a specified time. That’s the essence of a message, and extremely important – but makes for difficult analysis, and even more difficult for understanding the way modulation works. This is why you may want to use a different way of graphing a signal: the frequency domain. It is a representation of how strong the signal is over a range of frequencies. Let’s look.

Why is the Frequency Spectrum of a Signal Important?

There is a precise mathematical operation to convert a chunk of a signal into the frequency domain. It is dense, difficult, and takes practice to master. I even struggle with convolution of non-trivial signals regularly. Regardless, let’s see what our three signals above look like in this representation (skipping to the solution). Instead of plotting a signal’s voltage in time, we are plotting the power of the signal by frequency.

Single tone signal (frequency domain)

Dual tone signal (frequency domain)

Multi-tone signal (frequency domain)

Notice the clear spikes? That is the mathematical representation of a sine wave at that particular frequency (X-axis). Ideally, these spikes would be infinitely narrow (width) and infinitely tall, but due the techniques used by my Spice software, it is imperfect. This is called an impulse signal. Read more on this here! For the tone, we see one spike at 150 Hz. The dual tone has two spikes, 150 Hz and 300 Hz. The multi-tone signal that was unreadable in the time domain has been clearly chopped into small spikes, representing all the frequencies that were summed to create the signal.

A final example would be to show an audio signal. In the below picture, I have taken a 15 second sample of the song “White Room” by Cream. Don’t worry, no microphones were damaged during Eric Clapton’s guitar solo!

Audio Signal

This is how most signals appear, especially analog ones. The human voice and instruments do not play as discreet frequencies, and thus there is frequency content over an entire range (even though some of that content is almost inaudible). This range is taken from 3 Hz to 20 kHz, the approximate range of the human ear. Bass notes are lower in the range, while treble is higher. The Y-scale is represented in dB, which is a unitless representation of proportion. In essence, the higher the dB value, the more of that frequency is in the signal.

In theory, we can represent this analog signal as the sum of an infinite number of tones added together.

Filters!

Hopefully the graphical representation of frequency domains will shed some light on filter design. There are four types of filters: •  Low Pass filter: all frequencies over the “cutoff” are removed. •  High Pass filter: all frequencies under the “cutoff” are removed. •  Band Pass filter: All frequencies outside a distance from the “center” are removed. •  Band Stop filter: All frequencies within a distance from the “center” are removed.

Clockwise: Band Pass, High Pass, Low Pass filters

The “3dB” point is where signal output is reduced by ~30%. It has to do with how “log” magnitude is calculated (dB is a log scale): x [dB] = 10 * log(x[linear]) x [linear] = 10^(x[dB]/10)

Based on this, a gain of 0.7 [linear] is approximately -3.0dB (and change). It’s what is referred to as the cutoff frequency of a filter. A practical example of this is your car stereo, which may include a “crossover”. This is a special filter design that routes low frequencies to your woofer, high ones to the tweeters, etc. This is very important in radio receivers.

FCC Communication Bands

The FCC and other organizations worldwide have agreed that it would be absolute chaos to allow anyone to use any frequency for their own use. Thus, there are special allocations of frequency ranges for different uses. Examples include FM radio, AM radio, WiFi, cell phones, maritime communications, air traffic control, HAM radios, walkie talkies, military communications, police radios, and the list goes on. We haven’t even talked about satellites or space communication, either! It’s a crazy world out there and thankfully the FCC helps organize it all. A quick Google search will provide you a more detailed image and tables if you’re curious.

The FCC Spectral Allocation Table

The FCC has left a few bands open for low range personal use, hobbyists, and other general use in the “ISM bands” (Industrial, Scientific, Medical). This is where WiFi, walkie talkies, wireless sensors, and other commercial devices operate. Let’s talk frequencies again! The human ear has a range of 20 Hz to 20 kHz. What if our AM talk station is 680 kHz? How does the radio tower get the sound up to that frequency? How does it not interfere with other stations? How does the receiver bring the signal frequency back to an audible range?

Modulation

Let’s step away from the frequency domain and go back into the time domain. I am again making generous use of my earlier disclaimer: this is over-simplified and skips many details! This is only to get the concept. The reason I say this is because the math works out best in the time domain, and a graphical representation is best served in the frequency domain.

Modulation is what takes a signal from low frequencies (the message) and pulls it up to a higher frequency (the carrier). The idea is simple: Multiply your message by a high frequency carrier, such as 680 kHz. Voila, that’s AM radio! Wait, is it really that easy? Let’s look at a few mathematical relationships. In this case, theta is the message (the audible stuff) and phi is the carrier (the AM radio frequency, for example).

Our AM solution involves multiplying signals, but that’s hard to imagine in the time or frequency domain, since we only have seen what tones look like. But the nifty relationships above show us that two signals multiplied can be represented as two signals added together! Now it’s easy to plot a multiplied signal in the frequency domain.

A single tone (150 Hz) modulated on a carrier (1000 Hz)

In this picture, we have multiplied a 150 Hz tone with a 1000 Hz carrier. The table above shows us to expect two, half-powered signals at 1000-150 and 1000+150 Hz, 850 Hz and 1150 Hz. What does our sound byte look like when it’s been modulated?

Modulation of a sound clip to 700 kHz

Just as expected, we see two signals. One is carrier + message, one is carrier – message (even notice how it is reversed).

Here is a crude image of an AM frequency spectrum and signal content.

Demodulation

Now let’s talk about receivers. All signals start at the antenna, which sees all signals at the same time as one big jumbled mess. It isn’t the antenna’s job to sort through the mess of data it is picking up, but that of the tuner and other hardware. The theory of demodulating a signal is identical to modulating it, conveniently enough! To bring our audio signal back to “baseband” where it can be sent to a speaker, we multiply everything by the carrier again.

That’s a bunch of math, parenthesis, and f’s all over the place. But it’s correct, and we see that there are four signals that result from it: •  1/4 power signal, (2*carrier + message) •  1/4 power signal, (message) •  1/4 power signal, (2*carrier – message) •  1/4 power signal, (-message)

Let’s immediately disregard the term with a negative frequency. It is a mathematical artifact which occurs quite often when talking about modulation and the math involved. The two signals at double the carrier (assuming the carrier is much larger than the message, they are almost the same) can be filtered out with a Low Pass Filter, which will block all higher frequency content of a signal. That just leaves us with the original message, which can be boosted with an amplifier and then sent to a speaker. Cool! Here’s a picture of it, but backwards.

Conclusion

The purpose of this post was to give a 30,000 foot view of how radio transmission and signal modulation works. By taking multiple audio (or baseband) signals and mathematically multiplying them by different higher frequencies (the carrier), we can successfully transmit multiple data streams over the same channel without interference. Multiplying it by the carrier again brings the modulated signal back to baseband, and a low pass filter and amplifier clean up and magnify the signal for our listening pleasure! Please leave a comment below if you want to join the conversation!

Established in 2000, the  SOUKA (DSW) main products are modulators both in digital modulators and analog modulators, amplifier and combiner. We are the leading communication supplier in manufacturing the headend system in China. Our 16 in 1 and 24 in 1 now are the most popular products all over the world. For more, please access to https://www.soukacatv.com/.

Author:  mike1305, last updated on 1st, Sept., 2016

Source: News | Keysight Community