SDR PLay RSP2 Characteristics

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Synergymoon88
Posts: 1
Joined: Fri Apr 06, 2018 9:23 pm

SDR PLay RSP2 Characteristics

Post by Synergymoon88 » Sun Apr 08, 2018 8:39 pm

I am new, but slightly familiar with SDRs phased locked to GPSDOs. And am looking at SDRplay products.

So one of my team asked some questions about
the SDR Play

Some questions about the SDR Play RSP2:

1. What are the characteristics and limitations on the IQ output? Such as:
> Does the software directly support streaming IQ to the host computer's
HD, and if so, what are the min and max sample rates thus supported?

> What are the phase noise and residual FM characteristics assuming
a "perfect" external reference in use, particularly at receive frequencies
around 437 MHz?
> Can AGC be disabled for IQ output streaming to disk?
> What is the required external ref input frequency?

OK Guys in the SDRPLAY community, Any help?
Last edited by Synergymoon88 on Thu Jan 01, 1970 12:00 am, edited 0 times in total.
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g1hbe
Posts: 494
Joined: Sat Jan 17, 2015 3:28 pm
Location: Cheshire, UK

Re: SDR PLay RSP2 Characteristics

Post by g1hbe » Mon Apr 09, 2018 12:44 pm

I can't answer any of your questions except the reference frequency. It is 24 MHz on all models.

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Andy

Tech_Support
Posts: 499
Joined: Mon Jun 01, 2015 7:00 pm

Re: SDR PLay RSP2 Characteristics

Post by Tech_Support » Mon Apr 09, 2018 10:12 pm

It is possible to record the entire I/Q spectrum directly to the HDD of a PC using SDRuno. It is also possible to completely turn off the tuner AGC and adjust the RF and IF gain manually. The maximum sample rate is 10 MHz and the minimum sample rate without decimation is 2 MHz. Lower sample rates can be achieved via decimation. It is the final sample rate (after decimation) that will determine the bandwidth of the recorded spectrum.

According to the datasheet of the tuner, the integrated phase noise at around 500 MHz is 0.5 degree RMS integrated across a single sided bandwidth around 4 MHz. I am afraid that we have no further details than this. This spec should be valid down to 420 MHz.

In terms of the requirements for an external reference clock, it is spelled out in the following app note regarding using an external reference clock with the RSP2:

https://www.sdrplay.com/docs/SDRplay_RS ... e_R1P0.pdf

Sincerely

SDRplay Tech_Support

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