# Transmit from RF1, receive from RF2 **URL:** \ **Category:** GNU Radio\ **Created:** [March 10, 2014, 11:56pm UTC](https://www.ruby-forum.com/t/transmit-from-rf1-receive-from-rf2/239697 "2014-03-10T23:56:42Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![Detlef\_R](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/58f4c7/32.png) [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Post date:** [March 10, 2014, 11:56pm UTC](https://www.ruby-forum.com/t/transmit-from-rf1-receive-from-rf2/239697/1 "2014-03-10T23:56:42Z")
Hi list, here is the thing. I would like to know, how I can create a flow with blocks in GNU Radio companion, in order to receive a signal from the RF1 port of my URSP N210 and simultaneously , receive another signal from the RF2 port of the same USRP. Is there any option defining the port of the USRP when selecting USRP source/sink block? Thank you in advance. ---
**Author:** ![Dimitris\_Siafarikas](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/9fc29f/32.png) [@Dimitris\_Siafarikas](https://www.ruby-forum.com/u/Dimitris_Siafarikas)\ **Post date:** [March 11, 2014, 2:33am UTC](https://www.ruby-forum.com/t/transmit-from-rf1-receive-from-rf2/239697/2 "2014-03-11T02:33:13Z")
On Tue, Mar 11, 2014 at 6:54 AM, Dimitris Siafarikas [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)wrote: > Is there any option defining the port of the USRP when selecting USRP > source/sink block? Look into subdev and antenna selection. It depends on what daughtercard you use. Refer: [http://files.ettus.com/uhd\_docs/manual/html/general.html#specifying-the-subdevice-to-use](http://files.ettus.com/uhd_docs/manual/html/general.html#specifying-the-subdevice-to-use) [http://files.ettus.com/uhd\_docs/manual/html/dboards.html](http://files.ettus.com/uhd_docs/manual/html/dboards.html) Regards, Activecat ---
**Author:** ![Dimitris\_Siafarikas](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/9fc29f/32.png) [@Dimitris\_Siafarikas](https://www.ruby-forum.com/u/Dimitris_Siafarikas)\ **Post date:** [March 11, 2014, 3:32am UTC](https://www.ruby-forum.com/t/transmit-from-rf1-receive-from-rf2/239697/3 "2014-03-11T03:32:14Z")
Which daughterboard are you using? The only ones where you can receive 2 signals at once are BasicRX, LFRX, and TVRX2. The others only allow you to receive from one antenna port at a time. Matt On Mon, Mar 10, 2014 at 3:54 PM, Dimitris Siafarikas ---
**Author:** ![Dimitris\_Siafarikas](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/9fc29f/32.png) [@Dimitris\_Siafarikas](https://www.ruby-forum.com/u/Dimitris_Siafarikas)\ **Post date:** [March 11, 2014, 2:20pm UTC](https://www.ruby-forum.com/t/transmit-from-rf1-receive-from-rf2/239697/4 "2014-03-11T14:20:55Z")
I am using SBX board. I read somewhere that this board can transmit and receive from port 1 and only receive from port 2. Is this correct? Is there any way, using this board, to transmit and receive simultaneously even from only one port? If yes, how may I do this in GRC? From: Matt E. [[mailto:removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)] Sent: Tuesday, March 11, 2014 4:31 AM To: Dimitris Siafarikas Cc: GNURadio Subject: Re: [Discuss-gnuradio] Transmit from RF1, receive from RF2 Which daughterboard are you using? The only ones where you can receive 2 signals at once are BasicRX, LFRX, and TVRX2. The others only allow you to receive from one antenna port at a time. Matt On Mon, Mar 10, 2014 at 3:54 PM, Dimitris Siafarikas \ wrote: Hi list, here is the thing. I would like to know, how I can create a flow with blocks in GNU Radio companion, in order to receive a signal from the RF1 port of my URSP N210 and simultaneously , receive another signal from the RF2 port of the same USRP. Is there any option defining the port of the USRP when selecting USRP source/sink block? Thank you in advance. ---
**Author:** ![Dimitris\_Siafarikas](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/9fc29f/32.png) [@Dimitris\_Siafarikas](https://www.ruby-forum.com/u/Dimitris_Siafarikas)\ **Post date:** [March 11, 2014, 2:35pm UTC](https://www.ruby-forum.com/t/transmit-from-rf1-receive-from-rf2/239697/5 "2014-03-11T14:35:34Z")
This board has one receiver, one transmitter. You can transmit and receive simultaneously with it, but only on different ports. No TX and RX at the same time on one port, no RX and RX at the same time at all. Ralph. From: discuss-gnuradio-bounces+ralph=removed\_email\_address@domain.invalid [[mailto:discuss-gnuradio-bounces+ralph=removed\_email\_address@domain.invalid](mailto:discuss-gnuradio-bounces+ralph=removed_email_address@domain.invalid)] On Behalf Of Dimitris Siafarikas Sent: Tuesday, March 11, 2014 1:59 PM To: ‘Matt E.’ Cc: ‘GNURadio’ Subject: Re: [Discuss-gnuradio] Transmit from RF1, receive from RF2 I am using SBX board. I read somewhere that this board can transmit and receive from port 1 and only receive from port 2. Is this correct? Is there any way, using this board, to transmit and receive simultaneously even from only one port? If yes, how may I do this in GRC? From: Matt E. [[mailto:removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)] Sent: Tuesday, March 11, 2014 4:31 AM To: Dimitris Siafarikas Cc: GNURadio Subject: Re: [Discuss-gnuradio] Transmit from RF1, receive from RF2 Which daughterboard are you using? The only ones where you can receive 2 signals at once are BasicRX, LFRX, and TVRX2. The others only allow you to receive from one antenna port at a time. Matt On Mon, Mar 10, 2014 at 3:54 PM, Dimitris Siafarikas \ wrote: Hi list, here is the thing. I would like to know, how I can create a flow with blocks in GNU Radio companion, in order to receive a signal from the RF1 port of my URSP N210 and simultaneously , receive another signal from the RF2 port of the same USRP. Is there any option defining the port of the USRP when selecting USRP source/sink block? Thank you in advance. ---
**Author:** ![Dimitris\_Siafarikas](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/9fc29f/32.png) [@Dimitris\_Siafarikas](https://www.ruby-forum.com/u/Dimitris_Siafarikas)\ **Post date:** [July 4, 2016, 4:12pm UTC](https://www.ruby-forum.com/t/transmit-from-rf1-receive-from-rf2/239697/6 "2016-07-04T16:12:51Z")
Dear Sir, I would like to confirm from you that I can i do this job that… I want a transfer a Sinusoidal wave from one port of Antenna and want to receive same wave from second Antenna. How I will do… Actually I have done this job but problem is this that after removing both Antenna from USRP N210 I am still getting same wave.But that must not be happened. So where I am wrong Please help me as soon as possible. Here I am attaching file Please have a look and help me from resolving this issue. BRIJENDRA SHARMA PROJECT SCIENTIST. ---
**Author:** ![Dimitris\_Siafarikas](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/9fc29f/32.png) [@Dimitris\_Siafarikas](https://www.ruby-forum.com/u/Dimitris_Siafarikas)\ **Post date:** [March 11, 2014, 5:48pm UTC](https://www.ruby-forum.com/t/transmit-from-rf1-receive-from-rf2/239697/7 "2014-03-11T17:48:13Z")
Ok, let’s say I want to Tx from port1 and receive from port2. How am I supposed to do that on GRC? Or is set when I add a USRP source and a USRP sink automatically? From: Ralph A. Schmid, dk5ras [[mailto:removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)] Sent: Tuesday, March 11, 2014 3:34 PM To: ‘Dimitris Siafarikas’; ‘Matt E.’ Cc: ‘GNURadio’ Subject: RE: [Discuss-gnuradio] Transmit from RF1, receive from RF2 This board has one receiver, one transmitter. You can transmit and receive simultaneously with it, but only on different ports. No TX and RX at the same time on one port, no RX and RX at the same time at all. Ralph. From: discuss-gnuradio-bounces+ralph=removed\_email\_address@domain.invalid [mailto:discuss-gnuradio-bounces+ralph=removed\_email\_address@domain.invalid](mailto:discuss-gnuradio-bounces+ralph=removed_email_address@domain.invalid) [[mailto:discuss-gnuradio-bounces+ralph=removed\_email\_address@domain.invalid](mailto:discuss-gnuradio-bounces+ralph=removed_email_address@domain.invalid)] On Behalf Of Dimitris Siafarikas Sent: Tuesday, March 11, 2014 1:59 PM To: ‘Matt E.’ Cc: ‘GNURadio’ Subject: Re: [Discuss-gnuradio] Transmit from RF1, receive from RF2 I am using SBX board. I read somewhere that this board can transmit and receive from port 1 and only receive from port 2. Is this correct? Is there any way, using this board, to transmit and receive simultaneously even from only one port? If yes, how may I do this in GRC? From: Matt E. [[mailto:removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)] Sent: Tuesday, March 11, 2014 4:31 AM To: Dimitris Siafarikas Cc: GNURadio Subject: Re: [Discuss-gnuradio] Transmit from RF1, receive from RF2 Which daughterboard are you using? The only ones where you can receive 2 signals at once are BasicRX, LFRX, and TVRX2. The others only allow you to receive from one antenna port at a time. Matt On Mon, Mar 10, 2014 at 3:54 PM, Dimitris Siafarikas \ wrote: Hi list, here is the thing. I would like to know, how I can create a flow with blocks in GNU Radio companion, in order to receive a signal from the RF1 port of my URSP N210 and simultaneously , receive another signal from the RF2 port of the same USRP. Is there any option defining the port of the USRP when selecting USRP source/sink block? Thank you in advance. ---
**Author:** ![Dimitris\_Siafarikas](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/9fc29f/32.png) [@Dimitris\_Siafarikas](https://www.ruby-forum.com/u/Dimitris_Siafarikas)\ **Post date:** [July 4, 2016, 4:15pm UTC](https://www.ruby-forum.com/t/transmit-from-rf1-receive-from-rf2/239697/8 "2016-07-04T16:15:08Z")
Dear Sir, I would like to confirm from you that How can i do this job that… I want a transfer a Sinusoidal wave from one port of Antenna and want to receive same wave from second Antenna. How I will do… Actually I have done this job but problem is this that after removing both Antenna from USRP N210 I am still getting same wave.But that must not be happened. So where I am wrong Please help me as soon as possible. Here I am attaching file Please have a look and help me from resolving this issue. BRIJENDRA SHARMA PROJECT SCIENTIST. ---
**Author:** ![Ivancica](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/i/a88e4f/32.png) [@Ivancica](https://www.ruby-forum.com/u/Ivancica)\ **Post date:** [January 29, 2020, 12:21pm UTC](https://www.ruby-forum.com/t/transmit-from-rf1-receive-from-rf2/239697/9 "2020-01-29T12:21:13Z")
> [@Dimitris\_Siafarikas](#): > > BRIJENDRA SHARMA Hi, How you solve this problem? With regards, Ivana R.