how good is Luowave's "USRP LW 1"?

Talk about other SDR products like the FunCube, HackRF, BladeRF etc.
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Ben321
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how good is Luowave's "USRP LW 1"?

Post by Ben321 » Wed Feb 03, 2021 7:28 am

It's a clone of the original Ettus "USRP 1" (which is now no longer made by Ettus). You can buy one here https://www.aliexpress.com/i/32995702637.html it appears to have the same specs as the official USRP 1, at least going by the documentation I can find on it. Of course, there's also a matter of the quality of the parts uses to build it (like using a 5% resistor where a 1% resistor should have been used for more precision), and Chinese knockoffs tend to be lower quality. So I'd like to know from somebody who has bought both the USRP 1 (before Ettus stopped making it) and also the USRP LW 1 from Luowave, how good close are they to each other in actual specs (not just on-paper specs)? Is the Ettus version significantly better quality than the Luowave version? Or are they about the same? If about the same, I'm considering buying the Luowave USRP LW 1 as my next SDR, as it's very low priced (slightly cheaper than the price of the official USRP 1 when it was still in production). The aliexpress webpage for it says it's compatible with the USRP 1, which I think means that official Ettus USRP 1 daughter boards should work in it.

qrp
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Re: how good is Luowave's "USRP LW 1"?

Post by qrp » Tue Apr 20, 2021 1:33 am

12-bit ADC running at 64 MHz for 550 USD is too expensive.

For such a price I would expect 16-bit ADC running at 122.88 MHz + 14-bit DAC running at 400 MHz, with a good low noise LNA. programmable attenuator, 4-8 receivers and two transmitters (it requires FPGA with about 50-100 kLE).

hotpaw2
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Re: how good is Luowave's "USRP LW 1"?

Post by hotpaw2 » Tue Apr 20, 2021 4:01 pm

For over $200 (USD) less, you can get a direct sampling SDR with slightly higher 76 MHz sample rate 12-bit ADC, and a much faster Gigabit ethernet connection. It's the Hermes Lite 2. Several hundred built. I have a couple. Component quality from Makerfabs seems excellent.

If you want more bits for a higher price, there's also the Red Pitaya 288-16.

qrp
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Re: how good is Luowave's "USRP LW 1"?

Post by qrp » Tue Apr 20, 2021 9:25 pm

hotpaw2 wrote:
Tue Apr 20, 2021 4:01 pm
If you want more bits for a higher price, there's also the Red Pitaya 288-16.
Red Pitaya 122.88-16 is really good device for SDR, but expensive.
https://www.redpitaya.com/p52/sdrlab-12 ... andard-kit

If you choose between USRP and Red Pitaya 122.88-16, Red Pitaya 122.88-16 is the outright winner

Ben321
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Joined: Wed Feb 15, 2017 9:52 am

Re: how good is Luowave's "USRP LW 1"?

Post by Ben321 » Fri Jul 02, 2021 11:43 am

hotpaw2 wrote:
Tue Apr 20, 2021 4:01 pm
For over $200 (USD) less, you can get a direct sampling SDR with slightly higher 76 MHz sample rate 12-bit ADC, and a much faster Gigabit ethernet connection. It's the Hermes Lite 2. Several hundred built. I have a couple. Component quality from Makerfabs seems excellent.

If you want more bits for a higher price, there's also the Red Pitaya 288-16.
I just checked https://www.makerfabs.com/hermes-lite-2.html and it's out of stock. Any plans to make more? Or is that it, period, and too bad for anybody who's late to buying it?

hotpaw2
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Re: how good is Luowave's "USRP LW 1"?

Post by hotpaw2 » Fri Jul 02, 2021 7:22 pm

Ben321 wrote:
Fri Jul 02, 2021 11:43 am
I just checked https://www.makerfabs.com/hermes-lite-2.html and it's out of stock. Any plans to make more? Or is that it, period, and too bad for anybody who's late to buying it?
My guess is that Makerfabs would like to make more. The HL2 is a successful product for them, with somewhere around 1000 sold to date. However, according to the mailing list, 3 or 4 of the critical semiconductor components needed for the HL2v9 assembly are out-of-stock, and have very long lead times.

This might be related to the global electronics component shortage that's impacting many other radio vendors, and even major automobile manufacturers. Some news sites are reporting that the effects of this shortage could last for up to a couple years.

Not good news.

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