Tag Archives: rf

Note: Choosing 5Ghz Wi-Fi Channels for 802.11ac in AU

As society has moved towards ever smaller and more mobile devices, Wi-Fi has become an essential connectivity standard which we rely upon in our daily lives. It was initially made popular in the home by the availability of affordable, standardised … Continue reading

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Analysis: DVB-T2 Australian Television Networks Test Transmission

As I’ve been quite busy lately with work and job hunting, I really haven’t had much time to watch TV or look at the signals on the air. In fact, I’ve not had enough time even to look at Twitter, … Continue reading

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Satellite Signal Analysis: What if you have no loop-out port?

A number of people had expressed interest in the past in examining satellite signals from broadcast satellites using SDRs. While my normal advice is to use a regular satellite card to power the LNB and do the DiSEqC selection duties … Continue reading

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Review, Teardown: TBS 5220SE Universal TV Tuner USB Box

Recently, I embarked on an adventure to scan the C-band satellites in the sky. Unfortunately for me, my TBS 6925 tuners are both rather unwell and my Prof Revolution S2 8000’s are not doing much better by showing similar “bursts” … Continue reading

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C-band Sats – Part 9: 172E Eutelsat 172B, 180E Intelsat 18, 177W NSS 9

In the final installment, I look at the three easternmost satellites with signals receivable in Sydney, namely Eutelsat 172B, Intelsat 18 and NSS9. Owing to their positioning and the markets which they serve, the latter two are circularly polarized and … Continue reading

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C-band Sats – Part 8: ~154E Mystery?, 166E Intelsat 19, 169E Intelsat 805

By now, we’re at the satellites which are pretty much at the highest elevation in Sydney. Owing to the fact that satellites aren’t covering the entire belt, even though we’ve only looked through about 50% of the arc, it covers … Continue reading

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C-band Sats – Part 7: 142E-150E (?) Unidentified/Mystery Satellites

The last post ended on a semi mystery at around 140°E which I believed to be Express AM5. A look at the Lyngsat satellite chart shows that there aren’t any known C-band satellites between 138°E Telstar 18 and 166°E Intelsat … Continue reading

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C-band Sats – Part 6: 134E Apstar 6, 138E Telstar 18, 140E Express AM5 (?)

The satellite-hunting story continues (thanks to a little more free time), this time looking at Apstar 6, Telstar 18 and what I believe to be Express AM5. These spectrums were taken during the period of 24th-26th March, but I’ve only … Continue reading

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C-band Sats – Part 5: 125E ChinaSat 6A, 128.5E LaoSat 1 (?), 132E Vinasat 1

This part of my satellite hunting adventure looks at ChinaSat 6A, what I suspect to be LaoSat 1 and Vinasat 1. 125°E ChinaSat 6A ChinaSat 6A has a very similar role to ChinaSat 6B, carrying a large number of carriers … Continue reading

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C-band Sats – Part 4: 115.5E ChinaSat 6B, 120E AsiaSat 6, 122E AsiaSat 9

In part four of the series, I continue my C-band satellite hunting adventure by moving up the belt. This post looks at 115.5 degrees East (ChinaSat 6B), 120 degrees East (AsiaSat 6) and 122 degrees East (AsiaSat 9). 115.5°E ChinaSat … Continue reading

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C-band Sats – Part 3: 100.5E AsiaSat 5, 105.5E AsiaSat 7, 113E Palapa D

Continuing on my quest to hunt all the C-band satellites in sight, this post continues the series up from the western horizon to visit AsiaSat 5, AsiaSat 7 and Palapa D. 100.5°E AsiaSat 5 AsiaSat 5 serves direct to home … Continue reading

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C-band Sats – Part 2: 83E G-Sat 10(?), 87.5E ChinaSat 12, 91.5E Measat 3/3a

I decided to start my scan from the western horizon upward. The first challenge was attempting to receive the satellite that is the lowest possible elevation to the west, then tracking the belt upwards to reach the other satellites. At … Continue reading

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C-band Sats – Part 1: Introduction to Satellite Hunting

It was a little more than a month ago in March, during some wet weather and a lull in my job-hunting schedule, that I thought I’d embark on a C-band satellite hunt. No, I’m not shooting down satellites … it’s … Continue reading

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Review, Teardown: TP-Link Archer T2UHP AC600 High Power USB Adapter

I had looked at a relatively cheap dual-band 802.11ac dual-stream USB Wi-Fi adapter recently and it seemed that the pain of single-band Wi-Fi solutions may be soon coming to an end. Unfortunately, that adapter did have some design quirks and … Continue reading

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Review, Teardown: Unbranded AC1200 Dual-Band USB 3.0 Wi-Fi Adapter

In the short span of about two decades, Wi-Fi went from being a luxury that you would consider a limited alternative to a cabled Ethernet connection, useful for mobile devices only, to something resembling a near-replacement for the cabled Ethernet … Continue reading

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Salvage, Teardown: DingTong DT-98 8W 403-470Mhz Handheld Transceiver

Imagine my surprise when stopping to catch the bus one day, I see a hand-held radio in the grass not far from the bus stop. I was in a hurry and had to leave, so I hopped on the bus … Continue reading

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Repair (?): ICOM IC-R75 that won’t turn on!

Returning home from holidays is not easy. In some sense, I’d like to call it a holiday hangover. You start walking on the wrong side of the road, sleeping at odd hours, and in perpetual need of energy to unpack … Continue reading

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Farewell: TBS TBS6925 Professional PCIe Satellite Tuner Card

As a hobbyist with an interest in chasing satellite feeds, my TBS TBS6925 Professional Satellite Tuner Card was my dependable companion. Around AU$250 a piece, I purchased two back in 2011 and two years later, got around to reviewing it. … Continue reading

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An Incomplete Repair: BladeRF x40 Software-Defined Radio

My last trip to Singapore, Japan and Hong Kong kept me away from home for 80 days, in which time I thoroughly enjoyed doing things I couldn’t otherwise do from home. Despite arriving back home almost a month ago, it … Continue reading

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Visited: SMPTE 2017 Exhibition Sydney (18 – 21 July)

After returning from my first long-solo-trip, I decided to spend two months “decompressing” and getting ready for my next trip. Part of the reason was so I could attend CeBIT, Vivid Sydney and SMPTE Exhibition. The last time I went … Continue reading

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Review: Mixcder MS301 Bluetooth V4.2 Wireless Headset with aptX

Whenever I’m out and about, especially when commuting on public transport, I’m often listening to music or watching a video on my phone. Having a set of headphones over my head is my way of making the commute more bearable … Continue reading

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Teardown: Motorola CableComm Series II Cable Access Unit (MM1012A)

I remember when I was very young, peering outside the window and seeing a bunch of workmen and trucks pull up in front of the house. In a short time, they rigged a steel wire between the power poles, then … Continue reading

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Analysis: Freeview Sydney (18 April 2017) after SBS moves to HD MPEG-4

While I was on holidays, the DVB-T digital TV stations at home were undergoing the last of a series of long-anticipated changes. On 8th April 2017, SBS followed the lead of the other broadcasters and finally converted over to MPEG-4 … Continue reading

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Canb2016: Part 6 – DAB+, DVB-T, FM Broadcast & Other Radio Scanning

It’s been a busy day of analysis to bring this part of my Canberra trip to a posting, but I suppose, it’s probably good that I’ve done the analysis before the data got too stale. In this post, I will … Continue reading

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Canb2016: Part 3 – Exploring the CBRfree WiFi Network

To a geek, having an internet connection is everything. Seeing as my budget conscious hotel didn’t offer free Wi-Fi, I decided I would try my luck and see if I could fix that. They did offer Wi-Fi on a paid-for … Continue reading

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Analysis: Freeview Sydney Post-Launch of ABC HD (6-7th Dec 2016)

Yesterday marked the launch of ABC HD, which finally means that Sydney Freeview gets each broadcasters’ main stations in high definition at long last. (EDIT: Actually, not quite true, as 7HD Sydney is still a simulcast of 7mate.) According to … Continue reading

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Project: YYDZW BH1417F-based Stereo FM Transmitter Kit

While I was browsing the listings of electronics kits on eBay, I came across this particular stereo FM transmitter kit but I didn’t think much of it. In fact, given the chance to buy it, I passed over it twice. … Continue reading

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Project: Sainsmart Forty-9er “3W” 7.023Mhz QRP CW Transceiver Kit

Even though I’m insanely busy, it seems I just can’t help myself when it comes to cheap Chinese kits available on eBay. Of course, having built most of the cheap radio-based kits already, there isn’t really that much to build … Continue reading

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Project: CD2003GP+SC3610D FM Receiver w/LCD Alarm Clock (74-108Mhz)

My little “mission” to build random Chinese radio-kits from eBay continues with this rather odd and difficult kit. Unlike the other kits, this is the first to come with an LCD display, but is advertised strangely as FM Radio Kit … Continue reading

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Experiment: Sydney WFM Broadcast RDS (TMC, RT+) & ACS Audio

Since my last posting about subcarriers, I decided to do a little more digging around and try to understand more about the Open-Application RDS data and try a better approach at recovering the audio from the ACS (otherwise known as … Continue reading

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