CARA MUDAH BELAJAR ELEKTRONIKA DIGITAL

Kamis, 08 April 2021

Televisi Digital Di Wilayah Kediri Raya - Hadir di 47 & 48 UHF Tanpa ACI

ahocoolApril 08, 2021televisi Tidak ada komentar

Wilayah kediri raya atau disebut juga dengan keresidan kediri merupakan daerah di jawa timur yang memiliki kedekatan wilayah dan budaya, yang meiliputi : Kota Blitar , Kota Kediri, Kabupaten Blitar, Kabupaten Nganjuk (Dulu Kadipaten Berbek), Kabupaten Kediri ,Kabupaten Trenggalek dan Kabupaten Tulungagung. Sejak dahulu jaman belanda dalam urusan administrasi kendaraan bermotor, wilayah ini termasuk dalam Plat AG. Untuk siaran radio dan televisi umumnya wilayah ini mendapatkan layanan yang seragam karena wilayah tempat penduduk bermukim tepat secara geografis dikelilingi gunung dan bukit dan berada pada dataran kaki bukit yang sama.

Siaran televisi awalnya hanya mendapatkan relay TVRI yang stasiunnya berada di besuki. Dalam perkembangannya TV swasta lainnya hadir sejak SCTV surabaya melebarkan siarannya di jawatimur pada tahun 90an. Sayangnya siaran Trans group sempat hilang pada tahun 2010 an namun kini jangan khawatir karena TRANS TV dan Trans 7 telah hadir pada mux Transmedia Group di frekuensi 690 MHz atau saluran UHF 48.

Sedangkan Mux Metro TV berada pada frekuensi 682 Mhz atau 47 UHF . Ini membuktikan kalau keunggulan TV dgital DVB-T2 dengan frekuensi yang mepet pun dapat melakukan siaran yang jernih. Beda dengan TV analog yang harus loncat 1 saluran frekuensi diantara 2 buah saluran televisi yang adjacent / bersebelahan.

Interferensi saluran yang berdekatan (Adjacent Channel Interference / ACI ) adalah gangguan yang disebabkan oleh daya asing dari sinyal di saluran yang berdekatan. ACI dapat disebabkan oleh penyaringan yang tidak memadai (seperti penyaringan yang tidak lengkap dari produk modulasi yang tidak diinginkan dalam sistem FM), penyetelan yang tidak tepat atau kontrol frekuensi yang buruk (di saluran referensi, saluran yang mengganggu, atau keduanya).

Pada gambar TV analog diatas terlihat adanya gelombang berjalan pada gambar disebelah kanan akibat adanya ACI dari siaran TV tetangga. Bisa juga terjadi biasaya kalau dilingkungan rumah ada yang main pemancar FM atau main radio ORARI ini umum terjadi. Namun dengan teknologi DVB T2 hal ini dapat dihindari dengan penggunaan Digital Signal Processing yang lebih canggih tentunya.

Teknik menanggulangi ACI ini di patenkan oleh John Sidney Stewart , Loic Fontaine dan Anthony Pesin yang menggunakan teknik filter OFDM pada DVBT2. Dapat dibaca di : https://patents.google.com/patent/WO2016053661A1/en .

Untuk panduan, kami telah review beberapa merek STB digital yg sudah ada di pasaran dan anda kini bisa bandingkan sesuai fasilitas dan keunggulannya :

- Matrix Apple - Polytron PDV 600T2 - Venus Cabe Rawit - Evinix H-1 - Akari ADS-2230

-Tanaka

Bagi anda yg berada di lokasi lain di Nusantara dapat juga membaca update perkembangan migrasi TV digital di kota-kota besar seluruh Indonesia :

- Surabaya ( MNC , EMTEK , VIVA )

- Malang

- Jember

- Kediri

- Jombang & Mojokerto

- Madiun

- Jogja

- Semarang

- Banjarmasin

- Makasar

- Medan

- Palembang

- Perbatasan Malaysia

Which One Is Killing You ? The Amps Or The Voltages ?

ahocoolApril 07, 2021tutorial Tidak ada komentar

WARNING - DANGEROUS !!

DO NOT TRY TO IMITATE THE EXPERIMENTS WITHOUT SUPERVISION

Indeed, the conflict about which one kills you when electrocuted, whether the current or the voltage, becomes eternal like the story of which came first chicken or the egg ? ... If you think about it, imagine: when the heat and electricity must kill you, it doesn't matter which part led you straight into seeing heaven, but more importantly, why did you get electrocuted? For a Youtube scientist like Mehdi, this must be proven in theory and also in practical. Anyway, it will stung and then burned a little bit of his skin, but for the sake of science it still has to be proven.

When one power supply then the electrode is shorted, the maximum current will flow with the voltage close to zero. This is in accordance with OHM's electric law where current is inversely proportional to voltage (V = I x R). And don't be surprised if the result is that the connector will cause heat when shorted, as shown above.

In fact, this is also the principle of electric welding and miraculously, even though the connector is held in hand, we are protected from being electrocuted due to a short circuit in the voltage that produces the spark. This is because the current flows completely through the connector while the body of the byte has a greater resistance so it does not feel it (although there is also a little flow)

Because it doesn't feel anything when the naked cable held by the hands, let's try to use more wet part of the body like tongue, which has a lower resistance. But remember ! Don't trust 100% to the 7 segment screen on the power supply, Mehdi saw the display 1 volt, but in fact it's actually measured at 11 volts. It finally knocked him over! But if it is real 1 volt and proven by a voltmeter (so it is more valid) then 1 volt is safe ... (at least save for Mehdi who is a strong man, not for me who always afraid of being electrocuted!)

So based on the ohms law, with a voltage source of 1 volt and a body resistance of 10,000 ohms, the current flowing in the body is 0.1 milliamp. So that if you want to flow 1 Ampere of current to the body, a voltage of 10,000 volts is needed. This is the reciprocal relationship between current and voltage, that is, current will not flow without a difference in voltage between the two points. Likewise, if there is no current flowing in a conductor, then the voltage will not be present either.

Voltage and current both can kill, like the analogy of events an earthquake that occurs far in the ocean, you will not feel the vibration, but the aftermath is, the Tsunami can kill you.

The dangerous cooperation between current and voltage can also kill you as in the above experiment, where the supply voltage is set to 4 volts and then passed over a thin wire and there is heat followed by fire. Fires can also cause disasters that are no less frightening.

So the conclusion is no longer saying that electric current kills more than electric voltage. Vice versa, they are partners in crime!

ONCE AGAIN DON'T TRY ANYTHING I WRITE ABOVE!

TV Analog Switch Off In Singapore : An Indonesian Perspectives On TV's Digital Migration

ahocoolApril 07, 2021television Tidak ada komentar

The closest neighboring country to Indonesia, which has changed its digital television system and turned off all analog television technology, is Singapore. Maybe this article is a little out dated when read by fellow Indonesian lives in Batam and other Riau Islands because ASO (Analog Switch Off) in Singapore has been implemented in the new year of 2019. Let's see how the ASO process was conducted in that garden city.

Since 2019 on January 1st, the analog TV signal has been disabled - meaning households that haven't switched to digital television (DTV) will no longer be able to watch Mediacorp's free-to-air programs. We know that the island-city state of Singapore has very few TV channels and all of them belong to Mediacorp, the rest of Singapore's air is filled with broadcasts from Batam Indonesia and Johor Malaysia. The Minister of Communication and Information S. Iswaran revealed in a written reply to parliament in September 2018 that four out of five households have DTV.

Switching from analogue to digital broadcasting would cost a family in Singapore about $ 100 to install STB equipment to convert analog to digital signals. Plans to end analogue broadcasting by the end of 2017 were put on hold for a year to get more people switching.

As a result, the Government has set aside $ 40 million to help equip homes to receive digital broadcasts by the December 31 deadline. In April 2018, The Straits Times reported that up to 400,000 Housing Council homes still had to switch from analogue to digital broadcasting. IMDA has said it will start sending letters to these households, letting them know they are entitled to $ 100 worth of free equipment.

Homes can choose to install a free digital set-top box and antenna in their home for free, or get a $ 100 discount on their preferred digital TV equipment at participating stores. Starting 17 September 2018, households who have not switched are also seeing a smaller image on their screens, which serves as a visual reminder for them to switch before the analog TV signal is turned off.

There are also on-screen instructions and advertisements in various media to tell viewers how to switch to DTV. Digital transmission allows broadcasters to send more signals more efficiently, allowing viewers to receive higher quality images and sound. The user can also, among other benefits, choose which subtitles and language options to display.

In 2017, Communications and Information Minister Yaacob Ibrahim said the government is committed to helping Singaporeans switch to digital TV and enjoy its benefits. He said in Parliament last November that access to Mediacorp's free-to-air channels is important because they are a major source of news and entertainment in four languages, and carry programs that promote Singapore's social values and identity.

Straits Times customers who have not switched to digital broadcasting can also take advantage of special offers to get a digital television set. In collaboration with Philips and as part of the "ST + news with benefits" program to reward customers, they can purchase the 6000 series Ultra Slim Smart LED TV set from Philips for almost half the price from 13 November to 9 December 2018.

Televisi Digital di Jember dan Sekitarnya - Semakin jernih dan siap menyongsong proses migrasi

ahocoolApril 07, 2021televisi 35 komentar

Televisi umumnya memanfaatkan lokasi pegunungan untuk meletakkan pemancar nya karena mengambil keuntungan dari coverage yang cenderung lebih luas. Contohnya di kabupaten jember memiliki lokasi transmisi televisi yang memanfaatkan pebukitan dan gunung salah satunya gunung gending untuk TVRI. Disini juga terdapat banyak tower relay yang digunakan oleh transmisi radio microwave untuk komunikasi seluler / BTS. Penulis sempat melakukan survey ke sana tahun 2015 saat masih aktif di dunia telco untuk survey lokasi pemancar seluler.

Karena lokasinya yang bisa secara lurus tanpa halangan Line Of Sight dengan surabaya, maka sejak lama gunung gending menjadi pilihan stasiun transmisi / relay radio berbasis microwave. Selain itu juga gunung gending kini menjadi objek wisata favorit warga jember untuk sekedar mencari hawa sejuk atau kegiatan treking bersepeda MTB, off road motor bike / mobil, karena lokasinya selain indah medannya cukup menantang.

Dalam perkembangannya TV swasta juga hadir di kabupaten jember dengan RCTI yang memilih Darungan - Kemuning Lor - Arjasa sebagai lokasi transmisinya. Lokasinya berada di kaki bukit yang kalau diteruskan akan menuju ke gunung argopuro. Stasiun TV MNC group lainnya juga menggunakan lokasi yang sama. SCTV memiliki pemancar di tugusari bangsalsari, Metro TV berada di kemuning yang tidak jauh dari lokasi RCTI begitu juga JTV.

Kabar gembira dari teman sesama teknisi parabola di kabupaten jember, melaporkan bahwa di lokasi kecamatan bangsalsari pada april 2021 sudah memancar siaran televisi digital, dengan 13 saluran yang cukup jernih ditangkap. Salurannya kebanyakan sudah menggunakan format HD, berikut daftarnya :

1. INDOSIAR HD

2. SCTV HD

3. TRANS TV HD

4. TRANS7 HD

5. O CHANNEL HD

6. MENTARI HD

7. METROTV HD

8. MAGNA CHANNEL HD

9. BBS TV

10. BN TV HD

11. CNN INDONESIA HD

12. CNBC INDONESIA HD

13. KOMPAS TV

Untuk wilayah bangsalsari sinyal TVRI digital tidak terlalu bagus sehinggal tidak ter scan pada layar TV. Padahal TVRI memiliki pemancar digital mux di gunung gending - gumitir dengan siaran TVRI nasional, TVRI jatim, TVRI 3 Budaya dan TVRI 4 Sport.

Jadi bagi kalian warga jember dan sekitarnya, cukup menggunakan antena UHF lama anda untuk dapat menangkap siaran televisi digital, hanya saja televisinya butuh support tuner DVB T2 atau jika televisi anda masih jadul seperti tv tabung, maka butuh menggunakan dekoder TV digital. Tapi jangan sampai salah paham kalau TV digital yang dimaksud bukan TV lewat internet atau streaming yang pernah dibahas disini.

Untuk panduan migrasi, kami telah review beberapa merek STB digital yg sudah ada di pasaran dan anda kini bisa bandingkan sesuai fasilitas dan keunggulannya :