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Does SDR# support CommRadio CR1a?
Given that there are ZERO standards for how SDRs "do USB", it's not clear how this would work in practice. Someone would still have to write a driver that interfaces between the radio and this "generi
Given that there are ZERO standards for how SDRs "do USB", it's not clear how this would work in practice. Someone would still have to write a driver that interfaces between the radio and this "generi
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Marcus D. Leech
· #39276
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Instruction Manual
I dunno. I tried the noise-blanker on a Hip-Hop station, and it still sounding like Hip-Hop, rather than classic 1970s-era folk-rock to me. I think it's broken :) :)
I dunno. I tried the noise-blanker on a Hip-Hop station, and it still sounding like Hip-Hop, rather than classic 1970s-era folk-rock to me. I think it's broken :) :)
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Marcus D. Leech
· #39269
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Mini Current spec?
One can of course get definitive in-situ answers using devices like: https://www.amazon.ca/Display-Voltage-Current-Capacity-Measure/dp/B07B7MK6K2/ref=sr_1_9?dchild=1&gclid=Cj0KCQiAvbiBBhD-ARIsAGM48byK
One can of course get definitive in-situ answers using devices like: https://www.amazon.ca/Display-Voltage-Current-Capacity-Measure/dp/B07B7MK6K2/ref=sr_1_9?dchild=1&gclid=Cj0KCQiAvbiBBhD-ARIsAGM48byK
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Marcus D. Leech
· #38898
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S-Meter and db versus S-units
So even though IARU TR1 defines the S-unit scale, almost no receivers actually comply in any meaningful way. https://en.m.wikipedia.org/wiki/S_meter
So even though IARU TR1 defines the S-unit scale, almost no receivers actually comply in any meaningful way. https://en.m.wikipedia.org/wiki/S_meter
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Marcus D. Leech
· #37321
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Spyserver, full IQ and multiple users
There has historically been a problem in that PHY+MAC ethernet chips were designed for PCIe, so if you wanted ethernet in your embedded application, it was costly. That is now changing somewhat with 1
There has historically been a problem in that PHY+MAC ethernet chips were designed for PCIe, so if you wanted ethernet in your embedded application, it was costly. That is now changing somewhat with 1
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Marcus D. Leech
· #36882
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Characterizing the phase noise of the Airspy R2
Talking somewhat through my hat here, having never actually designed a PLL chip. My understanding is that loop bandwidth allows you to trade-off a number of parameters, including residual phase-noise
Talking somewhat through my hat here, having never actually designed a PLL chip. My understanding is that loop bandwidth allows you to trade-off a number of parameters, including residual phase-noise
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By
Marcus D. Leech
· #36865
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Spyserver, full IQ and multiple users
USB is of the devil. It's what happens when data channels are designed by people without adult supervision. It's a shame that 1Gbit-and-faster ethernet is so expensive and cumbersome to integrate into
USB is of the devil. It's what happens when data channels are designed by people without adult supervision. It's a shame that 1Gbit-and-faster ethernet is so expensive and cumbersome to integrate into
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Marcus D. Leech
· #36863
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To dBFS or not dBFS - New SDR# release
#announcements
That whole "if you know the total gain" is rather rare--particularly if your application is wildly device agnostic. Even if it isn't, then the accumulated uncertainty from batch variability and temper
That whole "if you know the total gain" is rather rare--particularly if your application is wildly device agnostic. Even if it isn't, then the accumulated uncertainty from batch variability and temper
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Marcus D. Leech
· #36503
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Help me debug my spyverter
That hadn't occurred to me. Makes perfect sense now.
That hadn't occurred to me. Makes perfect sense now.
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By
Marcus D. Leech
· #36420
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Help me debug my spyverter
I have an older (ca 1955) 220Mhz - 400Mhz tuneable cavity that that came out of military aircraft. HN connectors on it. I cannot imagine that they were running the implied power levels inside an aircr
I have an older (ca 1955) 220Mhz - 400Mhz tuneable cavity that that came out of military aircraft. HN connectors on it. I cannot imagine that they were running the implied power levels inside an aircr
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By
Marcus D. Leech
· #36410
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Help me debug my spyverter
In my mind, SMA connectors aren't for the "outside world" at all. They should live inside enclosures to effect RF connectivity inside an enclosure. Once you have to visit the "outside world", then som
In my mind, SMA connectors aren't for the "outside world" at all. They should live inside enclosures to effect RF connectivity inside an enclosure. Once you have to visit the "outside world", then som
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Marcus D. Leech
· #36395
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Exact tuning calculations
I have an Rb in the lab here--bought it surplus. Works OK but I had to build a buffer/clean-up circuit for it -- Rb clocks "naked" tend to have some spurs from the PLL circuitry.
I have an Rb in the lab here--bought it surplus. Works OK but I had to build a buffer/clean-up circuit for it -- Rb clocks "naked" tend to have some spurs from the PLL circuitry.
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Marcus D. Leech
· #36379
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Exact tuning calculations
Yes I know that. That's what makes it funny, right? Right? Is this mic on? Hello?
Yes I know that. That's what makes it funny, right? Right? Is this mic on? Hello?
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By
Marcus D. Leech
· #36357
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External frequency reference for Airspy R2?
Means some C-band earth stations may be going for cheap...
Means some C-band earth stations may be going for cheap...
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Marcus D. Leech
· #36350
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Help me debug my spyverter
Tape an old 4-banger calculator to the antenna. Can you hear all kinds of whirrs and pops and glompings at any frequency that should be in the AM band? The poor mans signal generator :)
Tape an old 4-banger calculator to the antenna. Can you hear all kinds of whirrs and pops and glompings at any frequency that should be in the AM band? The poor mans signal generator :)
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Marcus D. Leech
· #36344
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New SDR# Release v1756 (2991c02) to follow Telerik Update
#announcements
The only constant things in life are: death, taxes, and software updates
The only constant things in life are: death, taxes, and software updates
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By
Marcus D. Leech
· #36340
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Exact tuning calculations
Hey complex signals have negative frequencies.... :) :) :)
Hey complex signals have negative frequencies.... :) :) :)
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By
Marcus D. Leech
· #36339
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Exact tuning calculations
I ran into a vaguely-similar issue recently with USRPs. If you're using a very-high-quality external clock, the frequency resolution of the "mop up" operation done in the FPGA may not be commensurate
I ran into a vaguely-similar issue recently with USRPs. If you're using a very-high-quality external clock, the frequency resolution of the "mop up" operation done in the FPGA may not be commensurate
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By
Marcus D. Leech
· #36337
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Exact tuning calculations
It very much depends on what one is doing. Some observing modes are "spectral". Some could usefully use as much bandwidth as you can throw at them, since sensitivity is proportional (all else being eq
It very much depends on what one is doing. Some observing modes are "spectral". Some could usefully use as much bandwidth as you can throw at them, since sensitivity is proportional (all else being eq
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By
Marcus D. Leech
· #36310
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Exact tuning calculations
Direct sampling at between 400MHz and 1.4GHz isn't exactly cheap...
Direct sampling at between 400MHz and 1.4GHz isn't exactly cheap...
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By
Marcus D. Leech
· #36308
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