I have updated the rfconverter_libiio file in the base of Matlab. Now I can see the variation in signal power in the spectrum analyzer. However, in the receiver, the problem is still the same.
On Mon, Jun 26, 2023 at 8:36 PM Marcus D. Leech <patchvonbr...@gmail.com> wrote: > On 26/06/2023 09:32, Arhum Ahmad wrote: > > Thanks for the response, > > 1. I am using UBX 10-6000 MHz Rx/Tx ( > https://www.ettus.com/all-products/ubx40/) > 2. Yes, I am using AGC for the processing part. The parameter values I > have uses are > - DesiredPower: 2 > - AveragingLength: 50 > - MaxPowerGain: 60 > 3. I have checked the spectrum of the signal in a separate spectruHm analyzer, > there is NO change in the spectrum as I vary the gain. > > Assuming you have a complete UHD installation, you can use the > tx_waveforms example app to check this as well. Since you're > using MATLAB, I cannot help with that aspect. > > > > On Mon, Jun 26, 2023 at 2:58 AM Marcus D. Leech <patchvonbr...@gmail.com> > wrote: > >> On 25/06/2023 16:49, Arhum Ahmad wrote: >> >> Respected sir, >> I am using N-200 USRP for transmitting a signal. While transmitting, I >> have changed the Gain value in the SDRu transmitting block, but my >> signal strength at the receiver remains the same. I also stop and >> restart the code but the change in gain does not affect the received >> signal. I have tried the changing gain via both available options i.e., >> input port and dialog, but it seems to have no effect on the receiver. >> The signal strength at the receiver remains the same. I have tried 30 >> dB(Maximum gain) to 0 dB (minimum gain) in both cases received SNR is >> the same (i.e.,15 dB). I am using a wireless connection in >> line-of-sight, with minimum Tx gain at least a few drops in SNR should >> be observed. I have also tried -50dB (just checking) but no effect in >> the SNR is observed. The same thing I have tried using B210 as Tx, Rx >> signal strength does change in this case. However, while using N-200, no >> effect of changing the gain value is observed. Somehow gain value is >> fixed in N-200 while using the MATLAB SDRu block. Can you PLEASE HELP >> ME!!! IT IS VERY, VERY IMPORTANT. >> >> Well, neither usrp-users nor discuss-gnuradio are support lists for >> MATLAB. >> >> You haven't mentioned which daughter-card you are using in the N200, >> which would certainly help to fill in information about >> what *might* be going on. >> >> >> Does your receiver setup use AGC? Do you know what its set-points are? >> >> If you simply look at the spectrum on the RX end as you vary gain on the >> TX end, do you see a change? At the higher end, >> SNR may not change very much, depending on how it is being measured, >> etc. >> >> >> > > -- > *Thanks and Regards* > *Arhum Ahmad* > Ph.D. Scholar, Electrical Engineering Department, IIT Ropar > > +91- <+91-7015802356>7974897279 | arhum.19eez0...@iitrpr.ac.in > <2016eez0...@iitrpr.ac.in> > Lab No. 323, Communication Research Lab, J.C.Bose Building > > * CONFIDENTIALITY NOTICE: The contents of this email message and any > attachments are intended solely for the addressee(s) and may contain > confidential and/or privileged information and may be legally protected > from disclosure. If you are not the intended recipient of this message or > their agent, or if this message has been addressed to you in error, please > immediately alert the sender by reply email and then delete this message > and any attachments. If you are not the intended recipient, you are hereby > notified that any use, dissemination, copying, or storage of this message > or its attachments is strictly prohibited. * > > > -- *Thanks and Regards* *Arhum Ahmad* Ph.D. Scholar, Electrical Engineering Department, IIT Ropar +91- <+91-7015802356>7974897279 | arhum.19eez0...@iitrpr.ac.in <2016eez0...@iitrpr.ac.in> Lab No. 323, Communication Research Lab, J.C.Bose Building -- **CONFIDENTIALITY NOTICE: The contents of this email message and any attachments are intended solely for the addressee(s) and may contain confidential and/or privileged information and may be legally protected from disclosure. If you are not the intended recipient of this message or their agent, or if this message has been addressed to you in error, please immediately alert the sender by reply email and then delete this message and any attachments. If you are not the intended recipient, you are hereby notified that any use, dissemination, copying, or storage of this message or its attachments is strictly prohibited.* *
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