red pitaya sink in GRC

Applications, development tools, FPGA, C, WEB
Post Reply
tech62
Posts: 29
Joined: Wed Mar 29, 2017 12:31 pm

red pitaya sink in GRC

Post by tech62 » Thu Oct 19, 2017 9:51 am

Hi,
Simple question.
What range of input values does the "Red Pitaya Sink" in GRC accept ?
Is it 0-1 as a float ? or -1 to +1, or some other range. ?

I am interested in being able to create the largest output possible from the RP OUTs when using the sdr_transceiver application.
Not for driving an antenna, but for easily viewing on oscilloscope.

I do not know what happens once the data leaves GRC and goes into the RP, hence my question.
Thanks for any insights.
tech62

pavel
Posts: 789
Joined: Sat May 23, 2015 5:22 pm

Re: red pitaya sink in GRC

Post by pavel » Thu Oct 19, 2017 10:15 am

What range of input values does the "Red Pitaya Sink" in GRC accept ?
It should be around [-2, 2] or [-1.9, 1.9].

tech62
Posts: 29
Joined: Wed Mar 29, 2017 12:31 pm

Re: red pitaya sink in GRC

Post by tech62 » Fri Jan 19, 2018 6:43 am

Thanks for the reply.
As a follow up question...I am wishing to be able to view the baseband "message" signals on the carrier with a scope attached to the RP DAC outputs.

In the screenshots attached (which is a modified I am attempting to place a simple sinusoid at 2kHz onto the carrier at 600kHz...and was hoping to view these 600+/-1kHz signals via an external scope FFT.

What am I doing wrong such that I cannot see any effect on the output signals with my scope ?
I would like to be able to confirm that the baseband signals from GRC are indeed present on the carrier output from RP.

I can hear the AM on the receiver just fine.

Thanks for any help. I am running GRC on Linux Mint.
Screenshot from 2018-01-19 16_18_04.png
Screenshot from 2018-01-19 16_19_52.png
You do not have the required permissions to view the files attached to this post.

Post Reply
jadalnie klasyczne ekskluzywne meble wypoczynkowe do salonu ekskluzywne meble tapicerowane ekskluzywne meble do sypialni ekskluzywne meble włoskie

Who is online

Users browsing this forum: No registered users and 25 guests