ph4as @_ph4as_

Joined January 2017

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WaveDrom @wavedrom

a year ago

3D printed from brass / copper. Good performance observablehq.com/@drom/helical-… Design is parametrizable in 500-2000MHz range. Did 2 and 3 stage versions

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Aang254 (🦋 aang23.satdump.org) @aang254

2 years ago

Some video from space courtesy of @TUBspace's TUBIN satellite. Received on X-Band by @redplanet00. You can see the satellite tracking a point on Earth as it is passing overhead, as well as some wobble in attitude when it first rotates.

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Mike M. Volokhov @mishkathebear

2 years ago

In the case if you ever wanted to see what these cheapo 8GHz attenuators have inside.

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Monogourd @Monogourd

2 years ago

距离上次坏掉又过去大半年了，最近花了两个星期的时间查到了故障点。在Phase tracking电路中有一个全加器，它有4个输入来自拨码开关，有些开关轻微漏电导致全加器输出处于亚稳态(视频为全加器Pin1输出)。给这四个拨码开关加了上拉电阻解决问题。使用这种极弱的TTL内部上拉显然是42年前的疏忽。

Monogourd @Monogourd

2 years ago

距离上次坏掉又过去大半年了，最近花了两个星期的时间查到了故障点。在Phase tracking电路中有一个全加器，它有4个输入来自拨码开关，有些开关轻微漏电导致全加器输出处于亚稳态(视频为全加器Pin1输出)。给这四个拨码开关加了上拉电阻解决问题。使用这种极弱的TTL内部上拉显然是42年前的疏忽。 https://t.co/Swv17iKSTW

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桑様 @kuwahara82

2 years ago

ワイヤボンディング始めるぞコラァ

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Tom Verbeure @tom_verbeure

2 years ago

Increasing Frequency Counter Precision with Linear Regression tomverbeure.github.io/2023/06/16/Fre…

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Fred Jansen @redplanet00

2 years ago

Yesterday I switched the X-band kit over to LHCP. First satellite I tracked was FY3D .. and .. it looked as miserable as FY3F on RHCP; the exact same signal behaviour over elevation. So, this AM my first pretty succesfull FY3F pass. Mea culpa for not believing in it. Small crop.

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Antmicro @antmicro

2 years ago

Announcing gerber2ems - an #opensource script integrating @kicad_pcb with #OpenEMS, suitable for high frequency HW design, with 3D visualization in @Blender. Control your signal integrity analysis with our customized solutions: antmicro.com/blog/2023/11/o…

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Achim Vollhardt @dh2va

2 years ago

youtu.be/586Zn1ct-QA A must-see for all DSN nerds: the crossover we all waited for. @eevblog visiting @nascom1 !

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Steve @G8GKA

2 years ago

I’ve been metal bashing and melting solder today. Definitely worth taking time to make a jig to help with the alignment and assembly of the new 10GHz W2IMU feed horn. #GHz_Bands

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Mehdi @MehdiHacks

2 years ago

Now it’s time to compare my RF signal generators: MoRFeus, ERASynth Micro, tinySA Ultra’s signal gen mode, GenComm GC747A, and SignalHound VSG60A. First, I measure THD (total harmonic distortion) at 1GHZ on 0dBm and -20dBm output. I use SignalHound BB60D for measurements. 1/2

Mehdi @MehdiHacks

2 years ago

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Aang254 (🦋 aang23.satdump.org) @aang254

2 years ago

First imagery from FengYun-3G :-) (Received by @Dario24105) @CNSpaceflight here is the first public FengYun-3G image decoded just now, if you're interested.

Aang254 (🦋 aang23.satdump.org) @aang254

2 years ago

First imagery from FengYun-3G :-) (Received by @Dario24105) @CNSpaceflight here is the first public FengYun-3G image decoded just now, if you're interested. https://t.co/wSHyGVEB18

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Sam M @samerps

2 years ago

starting a new series of electromagnetic simulations and renders using openEMS in Blender! This animation shows how a wave propagates in a coax with open termination #b3d #Blender3d @kicad_pcb @FreeCADNews @DanielBogdanoff #Simulation #electronics @hackaday @chris_gammell

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GiamMa-based researchers SDR R&D IoT @giammaiot2

2 years ago

LibreCAL github.com/jankae/LibreCAL 4-port, 9kHz to 6GHz eCal module for VNAs. some empty links.. #VNA #VectorNetworkAnalyzer #LibreVNA

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Tomasz SP5LOT @Tomek_SP5LOT

3 years ago

CAS-5A. Photo 07. Thanks to the decoder @knglaser, but also the hard work of @scott23192 and @HRPTEgor I have such a picture! I sent to satellite twice requesting *07# . I saved the kss file and processed the decoder. SUCCESS ! @DL4PD @SatNOGS @ea4gpz

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Sarah M1SJE @M1SJE

3 years ago

Experimenting with my UV resin printer and making PCBs. I've got some Rogers 6035HTC that needs a PCB etched on it 🙂. But first, practicing on FR4.

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Lime Micro @LimeMicro

3 years ago

Lime Microsystems Prepares to Launch the Flexible New LimeSDR XTRX Software-Defined Radio Board. limemicro.com/news/lime-micr… #LimeSDR #XTRX #softwareDefinedRadio #OSHW #OpenSourceHardware #OpenSource #5G #cellularNetworks

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Daniel Estévez @ea4gpz

3 years ago

New blog post: Running the AD9361 at 122.88 Msps. Some comments about how the newest @NuandLLC bladeRF software manages to run the AD9361 at 122.88 Msps. Includes heavily commented code describing the register settings that they use. destevez.net/2023/02/runnin…

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Benjamin Vernoux @bvernoux

3 years ago

Welcome to LibreCAL A+ (Test In Progress) It is a fully open hardware/open source 4-port, 9kHz to >6GHz eCal module for VNAs by github.com/jankae that I have modified a bit github.com/jankae/LibreCAL

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ph4as @_ph4as_

3 years ago

Does anyone know if this trick also works with the AD9363 instead of the AD9361? Apparently it is using some undocumented feature to 2x oversample in 8-bit mode.

Nuand @NuandLLC

3 years ago

Does anyone know if this trick also works with the AD9363 instead of the AD9361? Apparently it is using some undocumented feature to 2x oversample in 8-bit mode.