Dream SDR features?

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rfishard

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Hi all,

Thought it would be fun to toss around what your dream SDR features would have. One of the fun things, at least to me, about this hobby is that we are still in its infancy. I personally have a couple Ettus B200, an Ettus N321 (for work), HackRF, a Lime, and a Airspy and while they are all awesome in different ways I can't help feel like there is still a long way to go before SDRs really go mainstream.

I think for me, my dream (well, a reasonable one anyway) would be something like a B210 but slightly better RF performance, some physical controls like traditional radios, a nicer case (something Apple-style, that feels like a really premium device), two RX and TX channels. It would also be kind of cool to have matched inputs for different applications, but that is hard to do from a manufacturer's standpoint I guess since they don't know what we are actually using these radios for. Oh - and I want bus powered! I hate plugging in separate power supplies to my 321....if it could be bus powered with Thunderbolt 3 sample transport that would be super convenient for mobile use. I realize this is probably impossible for a radio that has a higher power draw with multiple channels, but hey, we're dreaming right?

What crazy ideas would you guys love to see in a SDR?
 

ronenp

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1) stand alone Without need for external computer and Portable of course (as the Portapack do)
2) wide band (say 100MHZ Span or even full band say 1-500 MHZ or 1 to 1000 Mhz)
3) higher rx freq (say 8Ghz or even more)
4) built in decode of most digital modes (as DMR NXDN P25 D-star and more) and Display of received CC NAC RAN and Talkgroup
5) built in fast scanner with logging option on every stopped freq include recording of trafic
6) two channels with same phase (for direction finding options
7) decode end display of received PL and DCD
there are much more but well live something for next time
 

kb5udf

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Better band specific filtering options, such as with SAW filters, to mitigate interference.
 

Dirk_SDR

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A kind of standardisation:
1. Antenna input defined and switchable: high impedance, 50 Ohm, low impedance
2. Bias-Tee output for preamps or active antennas with defined voltage e.g. 4,5V (and NOT 3,3V or 4,5V or 5V or ...) and defined max. current e.g. 200mA
3. Defined hardware - software interface (dream: every SDR is compatible with every software)
4. ...
 

KA1RBI

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1. must be fully unlocked and user-reprogrammable with all firmware/software (and associated tools / SDKs) freely available and modifiable.

In case this is doubted, please consider some of the current AOR and Icom threads on RR ... trying to get these vendors to "wake up" ... etc.

Max
 

KA1RBI

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3. Defined hardware - software interface (dream: every SDR is compatible with every software)

if it could be permitted to give a shout-out to gr-osmosdr - any app that uses it (there is a large number of such) automatically works with any of the following

 

w2lie

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I've mentioned this on my podcast and live streams multiple times, and I'll echo my statements here...
I think the next "player" on the scanner radio scene will be some guy in his garage building SDR based scanner radios that mimic the look and feel of today's portable and desktop scanners.

Touch Screen would be nice, but something in an easy to use form factor that will have anyone used to a Whistler or Uniden feeling right at home using a radio with a SDR as it's guts, but for a fraction of the price of today's "SDS" based radios.

We aren't there yet, but we are getting closer as we find units like P25RX or the ability to house a SDR + RaspberryPI + Screen in a single 3D printed case.

And my offer stands... if anyone is working on this and has a kickstarter, and I see potential in the product, I'll be more than happy to back this project any day of the week.
 

Dirk_SDR

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I've mentioned this on my podcast and live streams multiple times, and I'll echo my statements here...
I think the next "player" on the scanner radio scene will be some guy in his garage building SDR based scanner radios that mimic the look and feel of today's portable and desktop scanners.

Touch Screen would be nice, but something in an easy to use form factor that will have anyone used to a Whistler or Uniden feeling right at home using a radio with a SDR as it's guts, but for a fraction of the price of today's "SDS" based radios.

We aren't there yet, but we are getting closer as we find units like P25RX or the ability to house a SDR + RaspberryPI + Screen in a single 3D printed case.

And my offer stands... if anyone is working on this and has a kickstarter, and I see potential in the product, I'll be more than happy to back this project any day of the week.
Such "garages" already exist, but there is no big breakthrough, obviously because the price isn't "portable":
 

w2lie

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Such "garages" already exist, but there is no big breakthrough, obviously because the price isn't "portable":
The device also doesn't do what conventional scanners today can. I see no mention of DMR, P25, UHF, or 700/800.
But, form factor is there.

Even with SDR++ software running on Android Tablets and phones, we are getting closer, but not there yet.
 

KA1RBI

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I've mentioned this on my podcast and live streams multiple times, and I'll echo my statements here...
I think the next "player" on the scanner radio scene will be some guy in his garage building SDR based scanner radios that mimic the look and feel of today's portable and desktop scanners.

Touch Screen would be nice

See post #36 of this thread:


The device also doesn't do what conventional scanners today can. I see no mention of DMR, P25, UHF, or 700/800.

The device in the above thread is running a free software package that can also be arranged to receive p25, ysf, dstar, dmr, and nxdn...
 

Dirk_SDR

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The device also doesn't do what conventional scanners today can. I see no mention of DMR, P25, UHF, or 700/800.
But, form factor is there.

Even with SDR++ software running on Android Tablets and phones, we are getting closer, but not there yet.
Ok, that's mainly a question of software and then of frequency range.
 
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thewraith2008

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Purely an idea for digital (trunking) purposes.
A SDR that can output a bandwidth of approx. 50 kHz. (and isn't $200+ a piece)
I know you can decimate in software but having a SDR hog the USB bandwidth with 2-10 MSps is pointless when all you want is 12.5 kHz.
A SDR with lower bandwidth means more SDRs can be connected and used at same time and less processing is required per SDR stream.

If all the frequencies are bunched together, then a wide bandwidth SDR with multiple VFOs approach is fine.
But if they are not, then using multiple SDRs is whats needed.
 

thewraith2008

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Getting the RTL to work better at low samplerates would be good as they are @ a good price.

Things get a bit average for the RTL down at low samplerates.
I modified to rtlsdr driver to allow more external fiddling with the tuner registers but I've not done much with it lately to see if tweaking the tuner helps a low samplerates. From memory, the decimation actually occurs in the RTL2832 and not the tuner (820T2) and I don't thing there is much in the way of controlling this decimation process externally.
 

thewraith2008

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The Funcube Pro is pretty narrow too. Not 50KHZ, but less than the RTL.
Early model shows 80 kHz usable bandwith, the newer @ 192 kHz (or a bit less).
The price (@ £150) and band gap between 240-420Mhz are a bit of a deal breaker.
 

smason

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Early model shows 80 kHz usable bandwith, the newer @ 192 kHz (or a bit less).
The price (@ £150) and band gap between 240-420Mhz are a bit of a deal breaker.
Yeah, not saying run out and buy one, but if you have one laying around.... It was pretty good in its day, but, not worth the $ now.
 
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