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drmpeg's profile picture. Engineer (Video Compression), Amateur Radio (W6RZ), Software Defined Radio and Adventure Time fan.

Ron Economos

@drmpeg

Engineer (Video Compression), Amateur Radio (W6RZ), Software Defined Radio and Adventure Time fan.

1KPosts 980Abonnés 361Abonnements
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drmpeg's profile picture.
Ron Economos
 @drmpeg
22 nov. 2017

IP over DVB-T2 test bed is complete. Essentially WiFi on completely clear frequencies (2305 and 3429 MHz). #gnuradio #dvbt2

drmpeg's tweet image. IP over DVB-T2 test bed is complete. Essentially WiFi on completely clear frequencies (2305 and 3429 MHz). #gnuradio #dvbt2
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drmpeg's profile picture.
Ron Economos
 @drmpeg
20 oct. 2023

Lots of electric train testing on Caltrain now. Tonight I saw an electric racing a diesel (which is odd because they never run in the same direction normally).

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drmpeg's profile picture.
Ron Economos
 @drmpeg
12 août 2023

Just saw a Stadler electric trainset testing on Caltrain. Going about 10 mph down the mainline in Mountain View.

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drmpeg's profile picture.
Ron Economos
 @drmpeg
1 mai 2023

VxWorks on an old SPARC SoC platform with Telnet from a HiFive Unmatched.

drmpeg's tweet image. VxWorks on an old SPARC SoC platform with Telnet from a HiFive Unmatched.
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drmpeg's profile picture.
Ron Economos
 @drmpeg
23 mars 2023

The C-Cube CL4010 from 1995. It added MPEG-2 capabilities to the CL4000. It took 12 of these chips in parallel to make a 704x480 adaptive field/frame real-time encoder. Used for DirecTV uplinks (upgrading them from unconstrained MPEG-1). Custom RISC ISA. #ThrowbackThursday

drmpeg's tweet image. The C-Cube CL4010 from 1995. It added MPEG-2 capabilities to the CL4000. It took 12 of these chips in parallel to make a 704x480 adaptive field/frame real-time encoder. Used for DirecTV uplinks (upgrading them from unconstrained MPEG-1). Custom RISC ISA. #ThrowbackThursday
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Ron Economos a reposté
sahajsarup's profile picture.
Sahaj Sarup 🐧
 @sahajsarup
5 janv. 2023

Very weird and oddly sad to see $AMD branded Zynq FPGAs, I was hoping they kept the Xilinx brand. I'm happy for the acquisition but sad to see the Xilinx name go away.

sahajsarup's tweet image. Very weird and oddly sad to see $AMD branded Zynq FPGAs, I was hoping they kept the Xilinx brand. I'm happy for the acquisition but sad to see the Xilinx name go away.
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drmpeg's profile picture.
Ron Economos
 @drmpeg
1 janv. 2023

ATSC 3.0 Frequency Division Multiplexing (FDM) with gr-atsc3. The second PLP data is zeroed so that the multiplex structure can be seen. It's targeted at low power mobile receivers. Preamble and SBS symbols can't be used since they're not frequency aligned. #atsc3 #gnuradio

drmpeg's tweet image. ATSC 3.0 Frequency Division Multiplexing (FDM) with gr-atsc3. The second PLP data is zeroed so that the multiplex structure can be seen. It's targeted at low power mobile receivers. Preamble and SBS symbols can't be used since they're not frequency aligned. #atsc3 #gnuradio
drmpeg's tweet image. ATSC 3.0 Frequency Division Multiplexing (FDM) with gr-atsc3. The second PLP data is zeroed so that the multiplex structure can be seen. It's targeted at low power mobile receivers. Preamble and SBS symbols can't be used since they're not frequency aligned. #atsc3 #gnuradio
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Ron Economos
 @drmpeg
28 déc. 2022

Article on gr-atsc3 in IEEE Broadcast Technology Magazine. Starts on page 20. bts.ieee.org/images/files/n… #gnuradio #atsc3

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drmpeg's profile picture.
Ron Economos
 @drmpeg
17 nov. 2022

Caltrain GP9's with the original SP numbers. Photo taken in 1999. #TBThursday

drmpeg's tweet image. Caltrain GP9's with the original SP numbers. Photo taken in 1999. #TBThursday
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drmpeg's profile picture.
Ron Economos
 @drmpeg
17 nov. 2022

New feature added to gr-atsc3, time-aligned frames. Samples are added to the guard interval to make frames exact multiples of 5 milliseconds. #gnuradio #ATSC3

drmpeg's tweet image. New feature added to gr-atsc3, time-aligned frames. Samples are added to the guard interval to make frames exact multiples of 5 milliseconds. #gnuradio #ATSC3
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Ron Economos
 @drmpeg
5 sept. 2022

Rick and Morty Season 6! #RickandMorty

drmpeg's tweet image. Rick and Morty Season 6! #RickandMorty
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Ron Economos
 @drmpeg
30 juin 2022

C-Cube CL4010 and CL4020 MPEG-2 encoder chips. Internal code names were E2 and E3. Same processor, just a die shrink on the right. Circa 1995.

drmpeg's tweet image. C-Cube CL4010 and CL4020 MPEG-2 encoder chips. Internal code names were E2 and E3. Same processor, just a die shrink on the right. Circa 1995.
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drmpeg's profile picture.
Ron Economos
 @drmpeg
3 juin 2022

ATSC 3.0 subframe transmitter is finished. Subframes allow for completely different modulation parameters for each PLP (Physical Layer Pipe). In this example, the 1st subframe is 8K FFT, 16QAM and the 2nd subframe is 32K FFT, 256QAM with reduced carriers.

drmpeg's tweet image. ATSC 3.0 subframe transmitter is finished. Subframes allow for completely different modulation parameters for each PLP (Physical Layer Pipe). In this example, the 1st subframe is 8K FFT, 16QAM and the 2nd subframe is 32K FFT, 256QAM with reduced carriers.
drmpeg's tweet image. ATSC 3.0 subframe transmitter is finished. Subframes allow for completely different modulation parameters for each PLP (Physical Layer Pipe). In this example, the 1st subframe is 8K FFT, 16QAM and the 2nd subframe is 32K FFT, 256QAM with reduced carriers.
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ea4gpz's profile picture. Everything space & RF. Amateur radio operator (EA4GPZ / M0HXM). PhD in Mathematics from @Matematicas_UAM. he/him

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𝙐𝙎𝘼 𝙎𝙖𝙩𝙘𝙤𝙢™

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𝙐𝙎𝘼 𝙎𝙖𝙩𝙘𝙤𝙢™

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Dr Marco Langbroek

@Marco_Langbroek
wRhSFdhmXm0EHWv's profile picture. 趣味でロボット、電子回路工作をやっています。それらに関連したブログもやっています。都内在住。良ければ見てくれると嬉しいです。宜しくお願いします。

mighty atom

@wRhSFdhmXm0EHWv
Siliconinsid's profile picture. What's in your chip??? Original photography & IC decaping by Antoine Bercovici Vintage computer & Macintosh enthusiast CC BY-NC-SA 4.0

Siliconinsider

@Siliconinsid
Sputnixru's profile picture. 🌌Частная космическая компания 💫Sitronics Group 💫участники ИНТЦ МГУ “Воробьёвы горы” 🌌Private Russian space company💫part of the Sitronics Group

Спутникс | Sputnix

@Sputnixru
carlosedp's profile picture. RISC-V Ambassador. Open-source Sw/Hw, FPGAs, cloud multiarch enthusiast. Build clusters for life @redhat and for fun elsewhere. Opinions are 100% mine.

Carlos Eduardo (@[email protected])

@carlosedp
MilcomMP's profile picture. President Teak Publishing. Book Author. TSM columnist, Former MT/ST editor. AM/FM DXer, HF/VHF/UHF Gov/Mil, Sats, ADSB Monitor. TGIF DMR TG 1033. YSF Am Link

From the Static (Larry Van Horn N5FPW)

@MilcomMP
r2x0t's profile picture.

r00t

@r2x0t
gregorysmiaris's profile picture. ⓈⓋ②ⓇⓇ 📡🇬🇷🇪🇺 🛰 📺 Digital Amateur TV #hamradio #hamr #amateurradio #amsat #batc DATV SDR Grid square KN10kx - Dreaming in digital. Thinking in binary

Gregory Smiaris ⓈⓋ②ⓇⓇ

@gregorysmiaris
W1PAC's profile picture. The radio oriented Twitter account of @Pacmannion. #Scanner📻, #hamradio🎙️, #avgeek✈️, #railfan🚅, #firebuff🔥, #weather⛈️ & other stuff.

📡Patrick ⚡ W1PAC📻

@W1PAC
de_w8tam's profile picture. Amateur Radio Operator, Parks on the Air board member, Mobile HF operator, hammock camper, Person of interest. He/Him/His

Thomas Martin

@de_w8tam
G4KLX's profile picture. Creator of D-Star, DMR, System Fusion, NXDN, P25, and POCSAG software, and interested in data modes, DSP, SDRs, and V/U/SHF. Opinions are correct. Germanophile.

Jonathan Naylor 🇪🇺 #FBPE #RejoinEU

@G4KLX
n0rc's profile picture. Money Pit Investor @n0rc@mastodon.radio

Reid

@n0rc
rixon's profile picture. Unix lover, ham radio operator, electronics technician. he/him

rixon

@rixon
rdavies6's profile picture. Husband,dad,chess parent,IT professional,all-round technogeek & amateur radio enthusiast G7VKQ. LIDS #007 G-QRP13104. ❤️all things Hallyu

Robin Davies

@rdavies6
BitBangingBytes's profile picture. Reverse Engineering 😈 for the public good 😇

Hash

@BitBangingBytes
SiFive's profile picture. As the pioneers who introduced RISC-V to the world, SiFive is transforming the future of compute. With SiFive, RISC-V has no limits!

SiFive

@SiFive
LeoLabs_Space's profile picture. Persistent Orbital Intelligence 📡 🛰️

LeoLabs

@LeoLabs_Space

United States Tendances

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