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

Posted: Wed Feb 03, 2021 7:28 am
by Ben321
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.

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

Posted: Tue Apr 20, 2021 1:33 am
by qrp
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).

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

Posted: Tue Apr 20, 2021 4:01 pm
by hotpaw2
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.

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

Posted: Tue Apr 20, 2021 9:25 pm
by qrp
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