T
tilla@comcast.net
Mon, Apr 4, 2016 3:59 PM
Platform:
Win 7 64 bit
UHD 3.9.2
Visual Studio 2015 Update 1
X310 with UBX-160
10Gb interface
I am porting my hardware platform from WBX-120 cards over to UBX-160.
There are some strange things going on with UBX-160.
Looking at the output signal on a spectrum analyzer zero span 1 MHz BW at center frequency, the noise floor is about -75 dbm.
executing the command tx_waveforms --args addr=192.168.40.2 --rate 10000000 --freq 300000000
When the app starts, signal level goes to about -70 dbm for 1 second, then -48 dbm for about 2 seconds, then to -15 dbm for the remainder of the application execution. Upon control-c of the application to halt, a signal is still being transmitted by the card at -53 dbm.
When run on a WBX-120, none of these startup or shutdown artifacts are present.
Seems to be present on all frequencies at varying amplitudes.
I have tried this on multiple X310s and multiple UBX cards, all exhibit the same performance.
Is this something you guys are aware of?
Thanks,
Platform:
Win 7 64 bit
UHD 3.9.2
Visual Studio 2015 Update 1
X310 with UBX-160
10Gb interface
I am porting my hardware platform from WBX-120 cards over to UBX-160.
There are some strange things going on with UBX-160.
Looking at the output signal on a spectrum analyzer zero span 1 MHz BW at center frequency, the noise floor is about -75 dbm.
executing the command tx_waveforms --args addr=192.168.40.2 --rate 10000000 --freq 300000000
When the app starts, signal level goes to about -70 dbm for 1 second, then -48 dbm for about 2 seconds, then to -15 dbm for the remainder of the application execution. Upon control-c of the application to halt, a signal is still being transmitted by the card at -53 dbm.
When run on a WBX-120, none of these startup or shutdown artifacts are present.
Seems to be present on all frequencies at varying amplitudes.
I have tried this on multiple X310s and multiple UBX cards, all exhibit the same performance.
Is this something you guys are aware of?
Thanks,
MM
Marcus Müller
Tue, Apr 19, 2016 3:39 PM
Hi Tilla,
I totally got lost in the discussions involving you, of which some were
off-list; has this been addressed?
Best regards,
Marcus
On 04/04/2016 05:59 PM, tilla--- via USRP-users wrote:
Platform:
Win 7 64 bit
UHD 3.9.2
Visual Studio 2015 Update 1
X310 with UBX-160
10Gb interface
I am porting my hardware platform from WBX-120 cards over to UBX-160.
There are some strange things going on with UBX-160.
Looking at the output signal on a spectrum analyzer zero span 1 MHz BW
at center frequency, the noise floor is about -75 dbm.
executing the command tx_waveforms --args addr=192.168.40.2 --rate
10000000 --freq 300000000
When the app starts, signal level goes to about -70 dbm for 1 second,
then -48 dbm for about 2 seconds, then to -15 dbm for the remainder of
the application execution. Upon control-c of the application to halt,
a signal is still being transmitted by the card at -53 dbm.
When run on a WBX-120, none of these startup or shutdown artifacts are
present.
Seems to be present on all frequencies at varying amplitudes.
I have tried this on multiple X310s and multiple UBX cards, all
exhibit the same performance.
Is this something you guys are aware of?
Thanks,
USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
Hi Tilla,
I totally got lost in the discussions involving you, of which some were
off-list; has this been addressed?
Best regards,
Marcus
On 04/04/2016 05:59 PM, tilla--- via USRP-users wrote:
> Platform:
> Win 7 64 bit
> UHD 3.9.2
> Visual Studio 2015 Update 1
> X310 with UBX-160
> 10Gb interface
>
> I am porting my hardware platform from WBX-120 cards over to UBX-160.
>
> There are some strange things going on with UBX-160.
>
> Looking at the output signal on a spectrum analyzer zero span 1 MHz BW
> at center frequency, the noise floor is about -75 dbm.
>
> executing the command tx_waveforms --args addr=192.168.40.2 --rate
> 10000000 --freq 300000000
>
> When the app starts, signal level goes to about -70 dbm for 1 second,
> then -48 dbm for about 2 seconds, then to -15 dbm for the remainder of
> the application execution. Upon control-c of the application to halt,
> a signal is still being transmitted by the card at -53 dbm.
>
> When run on a WBX-120, none of these startup or shutdown artifacts are
> present.
>
> Seems to be present on all frequencies at varying amplitudes.
>
> I have tried this on multiple X310s and multiple UBX cards, all
> exhibit the same performance.
>
> Is this something you guys are aware of?
>
> Thanks,
>
>
>
> _______________________________________________
> USRP-users mailing list
> USRP-users@lists.ettus.com
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
NP
Neel Pandeya
Tue, Apr 19, 2016 3:45 PM
Hello Tilla:
Which version of UHD are you using?
Could you please post the output of "uhd_usrp_probe" ?
I will try to reproduce the issue.
--Neel Pandeya
On 4 April 2016 at 08:59, tilla--- via USRP-users <
usrp-users@lists.ettus.com> wrote:
Platform:
Win 7 64 bit
UHD 3.9.2
Visual Studio 2015 Update 1
X310 with UBX-160
10Gb interface
I am porting my hardware platform from WBX-120 cards over to UBX-160.
There are some strange things going on with UBX-160.
Looking at the output signal on a spectrum analyzer zero span 1 MHz BW at
center frequency, the noise floor is about -75 dbm.
executing the command tx_waveforms --args addr=192.168.40.2 --rate
10000000 --freq 300000000
When the app starts, signal level goes to about -70 dbm for 1 second, then
-48 dbm for about 2 seconds, then to -15 dbm for the remainder of the
application execution. Upon control-c of the application to halt, a signal
is still being transmitted by the card at -53 dbm.
When run on a WBX-120, none of these startup or shutdown artifacts are
present.
Seems to be present on all frequencies at varying amplitudes.
I have tried this on multiple X310s and multiple UBX cards, all exhibit
the same performance.
Is this something you guys are aware of?
Thanks,
USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
Hello Tilla:
Which version of UHD are you using?
Could you please post the output of "uhd_usrp_probe" ?
I will try to reproduce the issue.
--Neel Pandeya
On 4 April 2016 at 08:59, tilla--- via USRP-users <
usrp-users@lists.ettus.com> wrote:
> Platform:
> Win 7 64 bit
> UHD 3.9.2
> Visual Studio 2015 Update 1
> X310 with UBX-160
> 10Gb interface
>
> I am porting my hardware platform from WBX-120 cards over to UBX-160.
>
> There are some strange things going on with UBX-160.
>
> Looking at the output signal on a spectrum analyzer zero span 1 MHz BW at
> center frequency, the noise floor is about -75 dbm.
>
> executing the command tx_waveforms --args addr=192.168.40.2 --rate
> 10000000 --freq 300000000
>
> When the app starts, signal level goes to about -70 dbm for 1 second, then
> -48 dbm for about 2 seconds, then to -15 dbm for the remainder of the
> application execution. Upon control-c of the application to halt, a signal
> is still being transmitted by the card at -53 dbm.
>
> When run on a WBX-120, none of these startup or shutdown artifacts are
> present.
>
> Seems to be present on all frequencies at varying amplitudes.
>
> I have tried this on multiple X310s and multiple UBX cards, all exhibit
> the same performance.
>
> Is this something you guys are aware of?
>
> Thanks,
>
>
> _______________________________________________
> USRP-users mailing list
> USRP-users@lists.ettus.com
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>
>
T
tilla@comcast.net
Tue, Apr 19, 2016 5:15 PM
Nothing yet.
Neel, listed below, UHD 3.9.2...
I can get you a probe output in a bit...
----- Original Message -----
From: "Marcus Müller via USRP-users" usrp-users@lists.ettus.com
To: "usrp-users" usrp-users@lists.ettus.com
Sent: Tuesday, April 19, 2016 11:39:59 AM
Subject: Re: [USRP-users] X310 UBX Tx issues
Hi Tilla,
I totally got lost in the discussions involving you, of which some were off-list; has this been addressed?
Best regards,
Marcus
On 04/04/2016 05:59 PM, tilla--- via USRP-users wrote:
Platform:
Win 7 64 bit
UHD 3.9.2
Visual Studio 2015 Update 1
X310 with UBX-160
10Gb interface
I am porting my hardware platform from WBX-120 cards over to UBX-160.
There are some strange things going on with UBX-160.
Looking at the output signal on a spectrum analyzer zero span 1 MHz BW at center frequency, the noise floor is about -75 dbm.
executing the command tx_waveforms --args addr=192.168.40.2 --rate 10000000 --freq 300000000
When the app starts, signal level goes to about -70 dbm for 1 second, then -48 dbm for about 2 seconds, then to -15 dbm for the remainder of the application execution. Upon control-c of the application to halt, a signal is still being transmitted by the card at -53 dbm.
When run on a WBX-120, none of these startup or shutdown artifacts are present.
Seems to be present on all frequencies at varying amplitudes.
I have tried this on multiple X310s and multiple UBX cards, all exhibit the same performance.
Is this something you guys are aware of?
Thanks,
USRP-users mailing list USRP-users@lists.ettus.com http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
Nothing yet.
Neel, listed below, UHD 3.9.2...
I can get you a probe output in a bit...
----- Original Message -----
From: "Marcus Müller via USRP-users" <usrp-users@lists.ettus.com>
To: "usrp-users" <usrp-users@lists.ettus.com>
Sent: Tuesday, April 19, 2016 11:39:59 AM
Subject: Re: [USRP-users] X310 UBX Tx issues
Hi Tilla,
I totally got lost in the discussions involving you, of which some were off-list; has this been addressed?
Best regards,
Marcus
On 04/04/2016 05:59 PM, tilla--- via USRP-users wrote:
Platform:
Win 7 64 bit
UHD 3.9.2
Visual Studio 2015 Update 1
X310 with UBX-160
10Gb interface
I am porting my hardware platform from WBX-120 cards over to UBX-160.
There are some strange things going on with UBX-160.
Looking at the output signal on a spectrum analyzer zero span 1 MHz BW at center frequency, the noise floor is about -75 dbm.
executing the command tx_waveforms --args addr=192.168.40.2 --rate 10000000 --freq 300000000
When the app starts, signal level goes to about -70 dbm for 1 second, then -48 dbm for about 2 seconds, then to -15 dbm for the remainder of the application execution. Upon control-c of the application to halt, a signal is still being transmitted by the card at -53 dbm.
When run on a WBX-120, none of these startup or shutdown artifacts are present.
Seems to be present on all frequencies at varying amplitudes.
I have tried this on multiple X310s and multiple UBX cards, all exhibit the same performance.
Is this something you guys are aware of?
Thanks,
_______________________________________________
USRP-users mailing list USRP-users@lists.ettus.com http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
_______________________________________________
USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
T
tilla@comcast.net
Tue, Apr 19, 2016 9:10 PM
Probe output attached...
As a bonus, on page 3, there is a spectrum analyzer screen shot of the output of uhd_usrp_probe...
Yes, there is rf output similar to described within tx_waveforms original issue to start this thread.
The lowest signal level is the noise floor, the second level is output during some of the startup of uhd_usrp_probe, the third level is output forever, even after the uhd_usrp_probe application has exited...
----- Original Message -----
From: "tilla--- via USRP-users" usrp-users@lists.ettus.com
To: "Marcus Müller" marcus.mueller@ettus.com, "Neel Pandeya" neel.pandeya@ettus.com
Cc: "usrp-users" usrp-users@lists.ettus.com
Sent: Tuesday, April 19, 2016 1:15:37 PM
Subject: Re: [USRP-users] X310 UBX Tx issues
Nothing yet.
Neel, listed below, UHD 3.9.2...
I can get you a probe output in a bit...
----- Original Message -----
From: "Marcus Müller via USRP-users" usrp-users@lists.ettus.com
To: "usrp-users" usrp-users@lists.ettus.com
Sent: Tuesday, April 19, 2016 11:39:59 AM
Subject: Re: [USRP-users] X310 UBX Tx issues
Hi Tilla,
I totally got lost in the discussions involving you, of which some were off-list; has this been addressed?
Best regards,
Marcus
On 04/04/2016 05:59 PM, tilla--- via USRP-users wrote:
Platform:
Win 7 64 bit
UHD 3.9.2
Visual Studio 2015 Update 1
X310 with UBX-160
10Gb interface
I am porting my hardware platform from WBX-120 cards over to UBX-160.
There are some strange things going on with UBX-160.
Looking at the output signal on a spectrum analyzer zero span 1 MHz BW at center frequency, the noise floor is about -75 dbm.
executing the command tx_waveforms --args addr=192.168.40.2 --rate 10000000 --freq 300000000
When the app starts, signal level goes to about -70 dbm for 1 second, then -48 dbm for about 2 seconds, then to -15 dbm for the remainder of the application execution. Upon control-c of the application to halt, a signal is still being transmitted by the card at -53 dbm.
When run on a WBX-120, none of these startup or shutdown artifacts are present.
Seems to be present on all frequencies at varying amplitudes.
I have tried this on multiple X310s and multiple UBX cards, all exhibit the same performance.
Is this something you guys are aware of?
Thanks,
USRP-users mailing list USRP-users@lists.ettus.com http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
Probe output attached...
As a bonus, on page 3, there is a spectrum analyzer screen shot of the output of uhd_usrp_probe...
Yes, there is rf output similar to described within tx_waveforms original issue to start this thread.
The lowest signal level is the noise floor, the second level is output during some of the startup of uhd_usrp_probe, the third level is output forever, even after the uhd_usrp_probe application has exited...
----- Original Message -----
From: "tilla--- via USRP-users" <usrp-users@lists.ettus.com>
To: "Marcus Müller" <marcus.mueller@ettus.com>, "Neel Pandeya" <neel.pandeya@ettus.com>
Cc: "usrp-users" <usrp-users@lists.ettus.com>
Sent: Tuesday, April 19, 2016 1:15:37 PM
Subject: Re: [USRP-users] X310 UBX Tx issues
Nothing yet.
Neel, listed below, UHD 3.9.2...
I can get you a probe output in a bit...
----- Original Message -----
From: "Marcus Müller via USRP-users" <usrp-users@lists.ettus.com>
To: "usrp-users" <usrp-users@lists.ettus.com>
Sent: Tuesday, April 19, 2016 11:39:59 AM
Subject: Re: [USRP-users] X310 UBX Tx issues
Hi Tilla,
I totally got lost in the discussions involving you, of which some were off-list; has this been addressed?
Best regards,
Marcus
On 04/04/2016 05:59 PM, tilla--- via USRP-users wrote:
Platform:
Win 7 64 bit
UHD 3.9.2
Visual Studio 2015 Update 1
X310 with UBX-160
10Gb interface
I am porting my hardware platform from WBX-120 cards over to UBX-160.
There are some strange things going on with UBX-160.
Looking at the output signal on a spectrum analyzer zero span 1 MHz BW at center frequency, the noise floor is about -75 dbm.
executing the command tx_waveforms --args addr=192.168.40.2 --rate 10000000 --freq 300000000
When the app starts, signal level goes to about -70 dbm for 1 second, then -48 dbm for about 2 seconds, then to -15 dbm for the remainder of the application execution. Upon control-c of the application to halt, a signal is still being transmitted by the card at -53 dbm.
When run on a WBX-120, none of these startup or shutdown artifacts are present.
Seems to be present on all frequencies at varying amplitudes.
I have tried this on multiple X310s and multiple UBX cards, all exhibit the same performance.
Is this something you guys are aware of?
Thanks,
_______________________________________________
USRP-users mailing list USRP-users@lists.ettus.com http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
_______________________________________________
USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
_______________________________________________
USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
MW
Michael West
Tue, May 10, 2016 9:24 PM
Hi Tilla,
We have been looking into this issue here at Ettus. The different power
levels are explained as follows:
-70 dBm: the TX PA turning on (expected)
-48 dBm: the TX LOs being tuned (DC leakage)
-15 dBm: the start of streaming (tone output as expected)
-53 dBm (upon exiting the application): the TX mixer is left on
I have attached a patch that suppresses the DC leakage from the LO tuning
and the high noise floor after execution from the TX mixer being left on.
It is a very simple change to the UBX code. Give it a try and let me know
how it works. We are working on vetting the change now so we can include
it in UHD. Any feedback you might have will be greatly appreciated.
Thank you,
Michael
On Tue, Apr 19, 2016 at 2:10 PM, tilla--- via USRP-users <
usrp-users@lists.ettus.com> wrote:
Probe output attached...
As a bonus, on page 3, there is a spectrum analyzer screen shot of the
output of uhd_usrp_probe...
Yes, there is rf output similar to described within tx_waveforms original
issue to start this thread.
The lowest signal level is the noise floor, the second level is output
during some of the startup of uhd_usrp_probe, the third level is output
forever, even after the uhd_usrp_probe application has exited...
*From: *"tilla--- via USRP-users" usrp-users@lists.ettus.com
*To: *"Marcus Müller" marcus.mueller@ettus.com, "Neel Pandeya" <
neel.pandeya@ettus.com>
*Cc: *"usrp-users" usrp-users@lists.ettus.com
*Sent: *Tuesday, April 19, 2016 1:15:37 PM
*Subject: *Re: [USRP-users] X310 UBX Tx issues
Nothing yet.
Neel, listed below, UHD 3.9.2...
I can get you a probe output in a bit...
*From: *"Marcus Müller via USRP-users" usrp-users@lists.ettus.com
*To: *"usrp-users" usrp-users@lists.ettus.com
*Sent: *Tuesday, April 19, 2016 11:39:59 AM
*Subject: *Re: [USRP-users] X310 UBX Tx issues
Hi Tilla,
I totally got lost in the discussions involving you, of which some were
off-list; has this been addressed?
Best regards,
Marcus
On 04/04/2016 05:59 PM, tilla--- via USRP-users wrote:
Platform:
Win 7 64 bit
UHD 3.9.2
Visual Studio 2015 Update 1
X310 with UBX-160
10Gb interface
I am porting my hardware platform from WBX-120 cards over to UBX-160.
There are some strange things going on with UBX-160.
Looking at the output signal on a spectrum analyzer zero span 1 MHz BW at
center frequency, the noise floor is about -75 dbm.
executing the command tx_waveforms --args addr=192.168.40.2 --rate
10000000 --freq 300000000
When the app starts, signal level goes to about -70 dbm for 1 second, then
-48 dbm for about 2 seconds, then to -15 dbm for the remainder of the
application execution. Upon control-c of the application to halt, a signal
is still being transmitted by the card at -53 dbm.
When run on a WBX-120, none of these startup or shutdown artifacts are
present.
Seems to be present on all frequencies at varying amplitudes.
I have tried this on multiple X310s and multiple UBX cards, all exhibit
the same performance.
Is this something you guys are aware of?
Thanks,
USRP-users mailing listUSRP-users@lists.ettus.comhttp://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
Hi Tilla,
We have been looking into this issue here at Ettus. The different power
levels are explained as follows:
-70 dBm: the TX PA turning on (expected)
-48 dBm: the TX LOs being tuned (DC leakage)
-15 dBm: the start of streaming (tone output as expected)
-53 dBm (upon exiting the application): the TX mixer is left on
I have attached a patch that suppresses the DC leakage from the LO tuning
and the high noise floor after execution from the TX mixer being left on.
It is a very simple change to the UBX code. Give it a try and let me know
how it works. We are working on vetting the change now so we can include
it in UHD. Any feedback you might have will be greatly appreciated.
Thank you,
Michael
On Tue, Apr 19, 2016 at 2:10 PM, tilla--- via USRP-users <
usrp-users@lists.ettus.com> wrote:
> Probe output attached...
>
> As a bonus, on page 3, there is a spectrum analyzer screen shot of the
> output of uhd_usrp_probe...
>
> Yes, there is rf output similar to described within tx_waveforms original
> issue to start this thread.
>
> The lowest signal level is the noise floor, the second level is output
> during some of the startup of uhd_usrp_probe, the third level is output
> forever, even after the uhd_usrp_probe application has exited...
>
> ------------------------------
> *From: *"tilla--- via USRP-users" <usrp-users@lists.ettus.com>
> *To: *"Marcus Müller" <marcus.mueller@ettus.com>, "Neel Pandeya" <
> neel.pandeya@ettus.com>
> *Cc: *"usrp-users" <usrp-users@lists.ettus.com>
> *Sent: *Tuesday, April 19, 2016 1:15:37 PM
>
> *Subject: *Re: [USRP-users] X310 UBX Tx issues
>
> Nothing yet.
>
> Neel, listed below, UHD 3.9.2...
>
> I can get you a probe output in a bit...
>
> ------------------------------
> *From: *"Marcus Müller via USRP-users" <usrp-users@lists.ettus.com>
> *To: *"usrp-users" <usrp-users@lists.ettus.com>
> *Sent: *Tuesday, April 19, 2016 11:39:59 AM
> *Subject: *Re: [USRP-users] X310 UBX Tx issues
>
> Hi Tilla,
>
> I totally got lost in the discussions involving you, of which some were
> off-list; has this been addressed?
>
> Best regards,
> Marcus
>
> On 04/04/2016 05:59 PM, tilla--- via USRP-users wrote:
>
> Platform:
> Win 7 64 bit
> UHD 3.9.2
> Visual Studio 2015 Update 1
> X310 with UBX-160
> 10Gb interface
>
> I am porting my hardware platform from WBX-120 cards over to UBX-160.
>
> There are some strange things going on with UBX-160.
>
> Looking at the output signal on a spectrum analyzer zero span 1 MHz BW at
> center frequency, the noise floor is about -75 dbm.
>
> executing the command tx_waveforms --args addr=192.168.40.2 --rate
> 10000000 --freq 300000000
>
> When the app starts, signal level goes to about -70 dbm for 1 second, then
> -48 dbm for about 2 seconds, then to -15 dbm for the remainder of the
> application execution. Upon control-c of the application to halt, a signal
> is still being transmitted by the card at -53 dbm.
>
> When run on a WBX-120, none of these startup or shutdown artifacts are
> present.
>
> Seems to be present on all frequencies at varying amplitudes.
>
> I have tried this on multiple X310s and multiple UBX cards, all exhibit
> the same performance.
>
> Is this something you guys are aware of?
>
> Thanks,
>
>
>
> _______________________________________________
> USRP-users mailing listUSRP-users@lists.ettus.comhttp://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>
>
>
> _______________________________________________
> USRP-users mailing list
> USRP-users@lists.ettus.com
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>
>
> _______________________________________________
> USRP-users mailing list
> USRP-users@lists.ettus.com
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>
>
> _______________________________________________
> USRP-users mailing list
> USRP-users@lists.ettus.com
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>
>
T
tommytsui@w5tech.com
Wed, Jun 11, 2025 7:44 PM
Hi,
I know this is an old post some years ago. I am curious if the UBX patch provided by Michael West still required for the latest UHD 4.8 release?
Would running uhd calibration utilities be able to resolve the issue without applying any patch?
We recently switched from WBX to UBX daughter cards but we experienced a different issue on UBX card. A 22MHz lo offset applied to WBX was fine but not for UBX. Somehow UBX doesn’t like such high lo offset. Reducing lo offset to a much smaller value (12MHz) resolved the issue, but that low lo_offset value doesn’t meet our requirements.
Thank you,
Tom
Hi,
I know this is an old post some years ago. I am curious if the UBX patch provided by Michael West still required for the latest UHD 4.8 release?
Would running uhd calibration utilities be able to resolve the issue without applying any patch?
We recently switched from WBX to UBX daughter cards but we experienced a different issue on UBX card. A 22MHz lo offset applied to WBX was fine but not for UBX. Somehow UBX doesn’t like such high lo offset. Reducing lo offset to a much smaller value (12MHz) resolved the issue, but that low lo_offset value doesn’t meet our requirements.
Thank you,
Tom
RK
Rob Kossler
Wed, Jun 11, 2025 7:56 PM
you mentioned wbx and ubx, but each of these have 2 variants: wbx-40,
wbx-120 and ubx-40, ubx-160. If you were previously using wbx-120 and you
switched to ubx-40, then this would explain your problem with LO offset of
22 MHz since the analog bandwidth is only 40 MHz on this card.
On Wed, Jun 11, 2025 at 3:44 PM tommytsui@w5tech.com wrote:
Hi,
I know this is an old post some years ago. I am curious if the UBX patch
provided by Michael West still required for the latest UHD 4.8 release?
Would running uhd calibration utilities be able to resolve the issue
without applying any patch?
We recently switched from WBX to UBX daughter cards but we experienced a
different issue on UBX card. A 22MHz lo offset applied to WBX was fine but
not for UBX. Somehow UBX doesn’t like such high lo offset. Reducing lo
offset to a much smaller value (12MHz) resolved the issue, but that low
lo_offset value doesn’t meet our requirements.
Thank you,
Tom
USRP-users mailing list -- usrp-users@lists.ettus.com
To unsubscribe send an email to usrp-users-leave@lists.ettus.com
you mentioned wbx and ubx, but each of these have 2 variants: wbx-40,
wbx-120 and ubx-40, ubx-160. If you were previously using wbx-120 and you
switched to ubx-40, then this would explain your problem with LO offset of
22 MHz since the analog bandwidth is only 40 MHz on this card.
On Wed, Jun 11, 2025 at 3:44 PM <tommytsui@w5tech.com> wrote:
> Hi,
>
> I know this is an old post some years ago. I am curious if the UBX patch
> provided by Michael West still required for the latest UHD 4.8 release?
>
> Would running uhd calibration utilities be able to resolve the issue
> without applying any patch?
>
> We recently switched from WBX to UBX daughter cards but we experienced a
> different issue on UBX card. A 22MHz lo offset applied to WBX was fine but
> not for UBX. Somehow UBX doesn’t like such high lo offset. Reducing lo
> offset to a much smaller value (12MHz) resolved the issue, but that low
> lo_offset value doesn’t meet our requirements.
>
>
> Thank you,
>
> Tom
> _______________________________________________
> USRP-users mailing list -- usrp-users@lists.ettus.com
> To unsubscribe send an email to usrp-users-leave@lists.ettus.com
>
T
tommytsui@w5tech.com
Thu, Jun 12, 2025 7:55 PM
Hi Rob,
Thank you for your reply. Indeed, when I ran UHD probe on another X310 with the old WBX daughter card installed, the old radio daughter card model reported WBX-120, not WBX-40 as I first thought. Your answer on another post explained it all. The max lo_offset depends on the RF bandwidth of the radio card and the signal bandwidth. Is such information available on any Ettus Research Wiki website? I don’t recall I had seen such explanation on internet. Anyway, thank you so much for your explanation!
Tom
Hi Rob,
Thank you for your reply. Indeed, when I ran UHD probe on another X310 with the old WBX daughter card installed, the old radio daughter card model reported WBX-120, not WBX-40 as I first thought. Your answer on another post explained it all. The max lo_offset depends on the RF bandwidth of the radio card and the signal bandwidth. Is such information available on any Ettus Research Wiki website? I don’t recall I had seen such explanation on internet. Anyway, thank you so much for your explanation!
Tom
MB
Martin Braun
Tue, Jun 24, 2025 5:29 PM
Hi Rob,
Thank you for your reply. Indeed, when I ran UHD probe on another X310
with the old WBX daughter card installed, the old radio daughter card model
reported WBX-120, not WBX-40 as I first thought. Your answer on another
post explained it all. The max lo_offset depends on the RF bandwidth of the
radio card and the signal bandwidth. Is such information available on any
Ettus Research Wiki website? I don’t recall I had seen such explanation on
internet. Anyway, thank you so much for your explanation!
It's one of those things that is not USRP-specific, but a generic RF thing.
We don't always document those (although there are plenty of cases where we
do). Anyway, glad you figured it out!
--M
On Thu, Jun 12, 2025 at 9:56 PM <tommytsui@w5tech.com> wrote:
> Hi Rob,
>
> Thank you for your reply. Indeed, when I ran UHD probe on another X310
> with the old WBX daughter card installed, the old radio daughter card model
> reported WBX-120, not WBX-40 as I first thought. Your answer on another
> post explained it all. The max lo_offset depends on the RF bandwidth of the
> radio card and the signal bandwidth. Is such information available on any
> Ettus Research Wiki website? I don’t recall I had seen such explanation on
> internet. Anyway, thank you so much for your explanation!
>
It's one of those things that is not USRP-specific, but a generic RF thing.
We don't always document those (although there are plenty of cases where we
do). Anyway, glad you figured it out!
--M
