What's the SKD50 Series AHD Signal Extender? AHD signal extender introduction

This product is a high-definition image transmission device designed by Dingshengwei for monitoring. It mainly provides long-distance transmission for AHD high-definition video signals. This product can support 2 megapixel high-definition video and analog signals, suitable for all kinds of monitoring fields.

Characteristics

 Includes an AHD variable channel modulation module and an AHD variable channel demodulation module

 2 megapixel high quality image analog signal

 Long transmission distance, adjustable channel, can mix 99 different channels without interfering with each other

Technical Parameters

HDMI input	Port	HDMI 1.4a
	Resolution	1920*1080_60P,1920*1080_50P;1920*1080_60i, 1920*1080_50i;1280*720_60p, 1280*720_50P
AHD video input	Port	BNC TYPE 75Ω
	Resolution	FORMAT	HZ	H*V	FSC(MHz)
		NTSC-M,J NTSC-4.43	59.94	720*240,960*240	3.579545
			59.94	720*240,960*240	4.4331875
		PAL-B,D,G,H,I PAL-M	50	720*288,960*288	4.4331875
			59.94	720*240,960*240	3.57561149
		PAL-NC	50	720*288,960*288	3.58205625
		PAL-60	60	720*240,960*240	4.433619
	Resolution	AHD_1080_30P	30	1920*1080	Flexible
		AHD_1080_25P	25	1920*1080	Flexible
		AHD_720_60P	60	1280*720	Flexible
		AHD_720_50P	50	1280*720	Flexible
		AHD_720_30P	30	1280*720	Flexible
		AHD_720_25P	25	1280*720	Flexible
Power supply		DC12V/1A
RF output port		BNC TYPE 75Ω
RF output test point		-20dB
Output Power		100dBuV
Output channel range		Variable channel, select one from 1-99 channel
Output channel display		2-digit LED
Audio input port		RCA
Audio maximum input electrical level		1.5Vp-p
485 communication port		SC3.81-21R-3P

(DSW) is dedicated to design, manufacture and sales of CATV analog & digital headend with our brand name SOUKA. DSW obtained ISO9001:2008 certificate authorized by CQC. We have 100 in-house skillful workers, which ensures the punctual delivery date. And a professional engineer team made up of 10 senior RF engineers and 6 IT engineers to fulfil precise management over all projects honored by our customers.

As one of the most reliable suppliers in this field, we continually spare no efforts in developing DSW into a world recognized brand with trustworthy and solid reputation. DSW sincerely invites you to enjoy the fascinating experience of modern technology and excellent customer service provided for you by our professional staff.

Our main products are modulators both in analog and digital ones, amplifier and combiner. We are the very first one 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.

In 2016,we launched the digital 16 in 1 headend with 1080P output,which supports all digital TV standards in the world. And we never stop our steps,more products will be released in the coming days. We are young but we have faith to find our path to the peak.

For more, please access to https://www.soukacatv.com/skd50-series-ahd-signal-extender_p52.html#parentHorizontalTab022

SKD19 series 1U Rack 12CH Encode modulator Introduction | Soukacatv.com

SKD19 series multimedia platform consists of one central control master and three pluggable function modules, Supporting HD encode multiplexing modulation integrated modules, HD encoding IP output module, satellite receiving modulation module, etc.

Modular design, support for different function modules to mix and match for customers to choose

Support intranet and remote management system

Easy front panel setup for quick and easy

1.Product features:

1) The product consists 3 pluggable encode modulation modules, each module supports 4 channels of HD signal input and 1 channel of 4-frequency RF output. 12-channel high-definition input 3-channel 12-frequency RF output products.

2) Video supports MPEG2 encoding, audio MPEG1 and AC3 encoding.

3) The Encode modulation module supports DVBC (J.83A), DTMB, ISDB-T, DVB-T, ISDB-T (standard definition is not supported), ATSC+J.83B

4) Support internet and remote management systems.

5) Simple setting can be done via the front display and buttons.

6) 1U Rack

 (1) Modulation Technical Parameters:

1. Physical Parameters
Product Size:		2U
Operating temperature and humidity		-10℃-45℃、40%-70%
Storage temperature and humidity		-40℃-70℃、40%-95%
The weight		15Kg
2. Encoded Part
HDMI	HDMI 1.4a
Video Encoding	Encode Format	MPEG2
	Support Resolution	1920*1080_60P,1920*1080_50P;1920*1080_60i, 1920*1080_50i;1280*720_60p, 1280*720_50P
	Bit Rate	1-19.5Mbps
Audio	Encode Format	MPEG1 Layer II, AC3
	Sample Rate	48KHZ/44.1KHZ/32KHZ
	Bit Rate	384kbps
PSIP	MGT、CVCT、STT、RTT	Programmable program name, pmt PID, Video PID, Audio PID

Dingshengwei Electronics Co., Ltd

(DSW) is dedicated to design, manufacture and sales of CATV analog & digital headend with our brand name SOUKA. DSW obtained ISO9001:2008 certificate authorized by CQC. We have 100 in-house skillful workers, which ensures the punctual delivery date. And a professional engineer team made up of 10 senior RF engineers and 6 IT engineers to fulfil precise management over all projects honored by our customers.

As one of the most reliable suppliers in this field, we continually spare no efforts in developing DSW into a world recognized brand with trustworthy and solid reputation. DSW sincerely invites you to enjoy the fascinating experience of modern technology and excellent customer service provided for you by our professional staff.

Our main products are modulators both in analog and digital ones, amplifier and combiner. We are the very first one 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.

In 2016,we launched the digital 16 in 1 headend with 1080P output,which supports all digital TV standards in the world. And we never stop our steps,more products will be released in the coming days. We are young but we have faith to find our path to the peak.

Source: https://www.soukacatv.com/skd19-series-1u-rack-12ch-encode-modulator_p51.html#parentHorizontalTab021

Brief Introduction About SKD3013 3 Channel HD encode Modulator from Soukacatv.com

1. Product introduction:
SKD3013 3CH high-definition code modulator is independently developed by Shenzhen Dingshengwei Electronics Co., Ltd (SOUKA Brand). The device supports three channels of high-definition signal input, encode multiplexing and then 1CH RF signal output, and the frequency range of the RF output is 150MHz ~ 1000MHz. Its signal source can be satellite receiver, various set-top boxes, Blu-ray players, etc.

HDMI HD signal with output signals supporting DVB-T standard TV and set-top box reception. The device can be used in public places such as subways, market halls, theaters, hotels,Advertising systems such as resorts. It can also be used for monitoring, training and education companies, schools, hospitals, etc. In addition, high-definition sports channels and VIP entertainment channels are available in places such as bars.
Second, product features and application range:

2. Product Features:
1) Support H.264 encoding;
2) supports 3 HDMI inputs and 1 RF output;
3) Support ISDB-T modulation standards;
4) Frequency conversion design, can be set arbitrarily within the frequency range;
5) Work with SKD3000M chassis, no need for complicated system settings, just adjust the frequency to the required frequency, simplifying the system debugging difficulty;
6) The operation interface includes: mobile phone APP, PC network management and panel buttons.

3. The scope of application:
1) Cable digital TV front end
2) satellite digital TV
3) terrestrial digital TV
4) image monitoring
5) Distance learning

4. The main technical parameters:

1) Physical parameters
Size: 132.5*201.7*21.05mm
Working temperature, humidity: -10°C-45°C, 40%-70%
Storage temperature, humidity: -40°C-70°C, 40%-95%

2) The encoding part
HDMI HDMI 1.4a
Video coding: Coding standard H.264
Resolution support: 1920*1080_60P, 1920*1080_50P; 1920*1080_60i,1920*1080_50i; 1280*720_60p, 1280*720_50P
Bit rate: 1-19.5Mbps

Audio
Coding standard MPEG1 Layer II
Sampling rate: 48KHZ/44.1KHZ/32KHZ
Bit rate: 384kbps PSIP MGT, CVCT, STT, RTT Programmable program name, pmt PID, Video PID, Audio PID

3) Modulation parameters
Modulation standard ISDB-T
Bandwidth 6/8MHz
Modulation constellation QPSK, 16QAM, 64QAM
Rate 1/2, 2/3, 3/4, 5/6, 7/8
Protection interval 1/32, 1/16, 1/8, 1/4
Transmission mode 8K
MER ≥32dB
RF frequency range 50-1000MHz minimum step 1KHz
Output impedance 75 ohms
Output level ≥90dBuV (0-31.5dB modulation range, stepping 0.5dB)
Out-of-band rejection ≥60dB

5. PACKING

1.SKD3000 encode modulator set includes:       

18Modules with chassis + 1 Power supply or 16Modules with chassis + 2 Power supply.

Dingshengwei Electronics Co., Ltd

(DSW) is dedicated to design, manufacture and sales of CATV analog & digital headend with our brand name SOUKA. DSW obtained ISO9001:2008 certificate authorized by CQC. We have 100 in-house skillful workers, which ensures the punctual delivery date. And a professional engineer team made up of 10 senior RF engineers and 6 IT engineers to fulfil precise management over all projects honored by our customers.

As one of the most reliable suppliers in this field, we continually spare no efforts in developing DSW into a world recognized brand with trustworthy and solid reputation. DSW sincerely invites you to enjoy the fascinating experience of modern technology and excellent customer service provided for you by our professional staff.

Our main products are modulators both in analog and digital ones, amplifier and combiner. We are the very first one 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.

In 2016,we launched the digital 16 in 1 headend with 1080P output,which supports all digital TV standards in the world. And we never stop our steps,more products will be released in the coming days. We are young but we have faith to find our path to the peak.

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

Q&A: Connecting Digital Cable to TV Through RF Modulator | Soukacatv.com

Question:
"I need help hooking up my TV to digital cable, DVD and VCR. I have a RF modulator, but no instructions. My TV is an older set with one cable hook up - the modulator has room for 4 hookups. Please, any help would be greatly appreciated."

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

Answer:
This is a problem a lot of people have - with or without a RF modulator. In this case, we'll attack the problem with the RF modulator in mind. After you connect everything you'll notice working with a RF modulator is just like working without one, except those with a RF modulator will have one device between their video signal and television.

As for the instructions, I am going to assume the DVD player is not a combo unit with the VCR, and that you want to record TV on your VCR. Step 4 will include connecting your DVD player, but if the DVD player is a combo unit with the VCR, just ignore Step 4 as DVD connection will be included in the VCR set up.

Step 1: Connect the coaxial cable coming out from the wall to your digital cable box in the ‘video in’ slot. It might also be labeled ‘antenna in’ or ‘cable in’.

Step 2: From the cable box, connect a coaxial or composite (yellow video cable) and stereo (red-white) RCA audio cables to the VIDEO IN terminal on your VCR.

Step 3: From the VCR, you will have to connect this to the RF Modulator using a coaxial cable from the VIDEO OUT on the VCR to one of the IN ports on your RF modulator.

Step 4: You can now connect your DVD player to the RF Modulator by using the yellow-red-white composite/RCA cables from the VIDEO OUT on the DVD player to another port on the RF modulator.

Step 5: From the RF modulator, connect this unit to your TV by using a coaxial cable. It will be from the VIDEO OUT on the RF modulator to the VIDEO IN or CABLE or ANTENNA IN port on your television.

This should be all you need to get started watching your digital television. In simple terms here is what you did:
Coaxial from wall to cable box
Cable box to VCR
VCR to RF modulator
DVD player to RF Modulator
RF modulator to TV

You will only be able to record what is on channel three because the digital cable will require you be on channel three. As for future connections to the RF modulator - just plug your viewing device into it and hit the button activating the video signal for the device you want to view. As long as it is connected to the television and the TV is on channel three, you should be able to see your video signal.

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://www.lifewire.com/connect-digital-cable-to-tv-3974918

RF MODULATION AND DEMODULATION OF AUDIO AND VIDEO SIGNALS | Soukacatv.com

Any information that is broadcast over the airwaves is broadcast via what are known as radio waves. Radio frequency (RF) is the rate of oscillation or frequency at which a particular type of information is transmitted over the airwaves. It doesn’t matter if we’re talking about radio, television, a Bluetooth mouse, your cell phone or the WiFi your computer is connected to; it’s all RF. Both analog and digital data must be converted to RF for transmission.

Specific RF frequencies or bands of frequencies are assigned for specific uses by the FCC (Federal Communications Commission). Most other countries adopt the FCC’s assignments, although not all do. This allows for some standardization worldwide, allowing the same equipment to be used in different countries.

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

The frequency that a particular that a particular type of data is transmitted with is referred to as its carrier frequency. Regardless of the type of data being transmitted, it has to be overlaid onto the carrier frequency. At the other end, the receiving device will be able to identify the specific data that it is looking for by looking for that carrier frequency. Whatever data is on it is the data that the device wants. When we tune a radio or change channels on at television, we are telling the device what carrier frequency to look for.

With much of today’s communications being digital, including television, wireless transmission of this data has become much simpler. Digital data can be transmitted at any frequency. The higher the frequency, the more digital data that can be transmitted per second. Since digital signals are merely a series of ones and zeroes, all that has to happen is to make the ones and zeroes at the frequency to be transmitted.

Analog data is another thing entirely. An analog audio or video signal is a severely modified sign wave. With audio, the frequency denotes the note while the amplitude of the sign wave denotes the volume. With video, the frequency denotes the color, while the amplitude denotes the brightness. That makes it much harder to turn audio and video signals into RF for transmission.

Before the introduction of digital television, all television and radio signals were analog. Older televisions only had a RF connector on the back, where the antenna was connected; not the plethora of different connections we see on the back of today’s TVs. Video from videocassette tapes and DVDs had to be output by the device as RF, so that it could be transmitted over wire to the TV and accepted by an input in the antenna connection.

This process, called RF modulation, consists of converting the incoming radio or television signal to a standard frequency, called an “intermediate frequency” (IF). This made it easier for the next step in the process, combining the audio and video signals with the carrier wave, producing the final RF signal. Even if this signal was not broadcast over the airwaves, the same process had to occur.

At the opposite end, in the receiving radio or television, the signal is then demodulated. The first part of this process is to strip off the carrier wave. This is actually a very simple process. Since the carrier wave is a sine wave, it can be easily reproduced by any device.

Going back to what I was saying when I talked about a radio tuner or TV channel selector, what is actually happening is selecting the frequency of carrier wave or sine wave to be generated. This sine wave is produced 180 degrees out of phase with the original RF signal. When combined with the RF signal, the carrier wave and the produced sine wave cancel each other out, making it effectively disappear. What is left is the IF.

The IF doesn’t need to be converted back to the original frequency to use, as the radio or TVs electronics can work with it the way it is, producing audio and video that is as good as the original.

The same basic process can happen with computers as well. A “modem” is really a “modulator/demodulator;” a device that does both modulation and demodulation. When the computer’s data needs to be sent over a telephone line, it needs to be converted to audio signals, because that’s what the phone system is designed to work with.

The modulator portion of the computer’s modem does the same thing as what we’ve already discussed for radio and television, combining the computer’s data with a carrier wave. It does one more thing as well, it turns that into an audio signal. That is the rasping sound you hear when a modem is trying to connect to another modem at the other end.

Upon receiving the data, the modem strips off the carrier signal in the same way we’ve already seen, with the exception that there is no manual selection of the frequency. That is an automatic function done by the modem. The resulting data is an digital data stream which the computer can use.

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://www.ramelectronics.net/Audio-Video-RF-Modulation-Demodulation.aspx