Hi,
I am trying to run an application written in GNU Radio. The application
insert tags e.g. "tx_time", "tx_sob" to control the transmission time. The
value of "tx_time" is such that data is transmitted at start of new second.
But I observe that the transmission and PPS is not synchronized when I see
the transmission and PPS on scope. Sometime the transmission is late and
sometime it is early. Has anyone faced this issue? Are there any examples
that I can test. Thanks.
--
Usman
Good-day,
I have been having difficulty trying to locate a HOWTO or other document
outlining how to use/configure GNURADIO for the umTRX. I understand that
GNURADIO will work with the umTRX however am not yet savvy with SDR and do
not want to jump through hoops trying to get this working. If someone can
point me in the right direction, it would be appreciated.
Thank you
George
Hi,
I know that on the UmTRX the switching controllers ( ST L5973 ) are
all synchronized together.
IIRC the earlier versions of the UmTRX didn't have this and I'm
wondering if you really noticed a difference due to this change ?
Cheers,
Sylvain
Hi all,
We've just tagged 1.0.4 release of the UmTRX host driver. A short
summary of the changes:
* Do not add 'g' to a git id when creating a version string.
* Proper debianization.
* Add ability to set diversity switches position from UHD args.
* By default route each Rx channel to it's own antenna.
* JSON API to question/control property tree of a running UHD app.
Useful for querying sensors and for debugging purposes.
* Python utility to query VSWR from a running UHD app in real time
using JSON API.
* Fix DC and IQ calibration utilities.
Binary build for Ubuntu will soon be available from the MyriadRF PPA.
--
Regards,
Alexander Chemeris.
CEO, Fairwaves, Inc.
https://fairwaves.co
Hi All,
We want to run two independent ARFCNs on UmTRX using the two TRXs on the device using osmo-bts, but just as trx 0 is defined in osmobts.cfg we cannot define trx 1. Can someone please help us accomplish this? Also please inform if it is possible that we run one TRX on GSM900 and another on 1800?
Note: we have compiled the openbsc setup as per instructions at http://openbsc.osmocom.org/trac/wiki/network_from_scratch using the jolly/multi-trx branch.
Regards,
Amber & Sarosh
Hello Alexander,
Is the cost of the most current revision (2.3.1) of the UmTRX $950 as indicated on the Fairwaves website for the 2.2 revision? Also, please let me know about lead times for the umTRX.
Thank you
George
Hi,
I have been following the instructions at
(http://www.rs-online.com/designspark/electronics/eng/blog/running-a-gsm-net
work-on-the-raspberry-pi-2) but have encountered a strange error when I run
the "uhd_usrp_probe" command, stating:
"
linux; GNU C++ version 4.6.3; Boost_105000; UHD_003.008.002-151-gbf4f50de
-- Opening a UmTRX device... 192.168.10.2
Error: RuntimeError: NotImplementedError: holler protocol not implemented
"
I have done a search on Google for the error but there doesn't seem to be
any information on it.
Do you have any idea what is causing it? Any help would be much appreciated.
Should you be interested in knowing the exact commands I ran when following
the instructions, let me know and I'll write them out.
Regards,
Kea
