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Old 11-Sep-2020, 7:45 PM   #42
Retired A/V Tech
Join Date: Aug 2012
Location: S.E. VA
Posts: 2,677
Originally Posted by tripelo View Post
This topic probably could be in another thread.

Would like your thoughts on dynamic range of Airspy vs. SDRplay RSP1.

Rabbit73, do you see differences in instantaneous dynamic between the two scanners, for:

- Wideband (several channels displayed)
- Single channel (display maybe 8-10 MHz or so)

No hurry on response. Do not wish to derail current thread.

Good to hear from you.

The OP and I are both interested in SDRs as a diagnostic tool. I see no harm in a brief response.

The dynamic range of the SDR is determined by the bit depth of the ADC (Analog to Digital Converter). The Airspy R2 and SDRplay RSP1A are very similar in that respect; 12 bits. Both are far superior to the RTL-SDR.COM V3 dongle which has an 8 bit depth ADC, giving it a dynamic range of about 50 dB. Comparison chart here:
Comparisons with other common Wideband Commercial Software Defined Radios

For a scan of 8-10 MHz for a single channel, both are quite rapid. For a wider scan, it takes slightly longer as would be expected, but it is real-time that can show changes. The Spectrum Spy scanner is faster than the SDRplay scanner. Both scanners are much more rapid than the RTL-SDR Scanner which takes forever to piece together individual sections into a complete scan; not real-time.

The separate scanner software available for the RSP1A looks like an old-time SA. The Spectrum Spy software that is included in the SDR# download for the R2 is very colorful. I prefer it to the scanner for the RSP1A, but the R2 costs twice as much as the RSP1A.

Some videos
Channels are 16, 19-21, 31-33, cellular

Scanner for RSP1A


hide controls

Spectrum Spy for R2

If you can not measure it, you can not improve it.
Lord Kelvin, 1883

Last edited by rabbit73; 12-Sep-2020 at 1:42 PM.
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