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Today's Topics:
1. E100 + GPSDO problem (Nowlan, Sean)
2. Ettus Research Career Posting: Software Design Engineer
(Ben Hilburn)
----------------------------------------------------------------------
Message: 1
Date: Fri, 25 Jan 2013 17:54:11 +0000
From: "Nowlan, Sean" <[email protected]>
To: "[email protected]" <[email protected]>
Subject: [USRP-users] E100 + GPSDO problem
Message-ID: <195933287DC65748BA7AE867BA8E430B6235B71B@apatlisdmbx02>
Content-Type: text/plain; charset="iso-8859-1"
Hi all,
I have an E100 rev 3.0 and GPSDO (Ettus-modified Firefly 1A). For some reason
the E100 won't lock to the 10MHz reference. Several thoughts:
1) Even if GPS is not locked, the OXCO is pretty stable, so E100 should
theoretically lock.
2) It could just be a bad GPSDO module, but I want to confirm I'm doing
everything right before drawing that conclusion.
Jumpers J15 and J16 are configured for flexible clocking
(http://files.ettus.com/uhd_docs/manual/html/usrp_e1xx.html#changing-the-master-clock-rate<http://files.ettus.com/uhd_docs/manual/html/usrp_e1xx.html#changing-the-master-clock-rate).>).
I came across the problem while setting up OpenBTS (reference lock timeout
error) but I tried a simple Python script to test:
...
my_usrp.set_clock_source("external", 0)
sleep(1)
while not my_usrp.get_mboard_sensor("ref_locked", 0):
print "ref not locked"
sleep(1)
print "hooray! ref is locked!"
...
I ran it for a few minutes and never got a lock. It was my understanding that
normally the PLL is orders of magnitude faster at locking than this. Any help
would be appreciated! :)
Sean
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Message: 2
Date: Fri, 25 Jan 2013 11:46:22 -0800
From: Ben Hilburn <[email protected]>
To: GNURadio Discussion List <[email protected]>,
[email protected]
Subject: [USRP-users] Ettus Research Career Posting: Software Design
Engineer
Message-ID:
<CAOEVZkK=i6ya+S3q1RphVLFV9T9agoZOux0Kj3Og=noy4ky...@mail.gmail.com>
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Hi all -
Please find attached (and pasted below) a career posting for a design
engineering position at Ettus Research! If you are a software / FPGA
engineer, like SDRs, and are interested in hacking on new hardware, please
check it out!
*
*
*Career Posting: Software Design Engineer*
Location: Mountain View, CA, 94043
Position Type: Full Time
*Company Description*
Ettus Research? is the world's leading supplier of Software-Defined Radio
(SDR) platforms, including the Universal Software Radio Peripheral (USRP?)
family of products. USRPs are used by thousands of engineers worldwide and
remain the top choice in software defined radio hardware for algorithm
development, exploration, and prototyping.
We are a small engineering-focused company, located in Silicon Valley.
Specializing in using the latest components to advance
commercially-available radio equipment, we are an agile design team that
takes pride in our ?hacker? / ?maker? culture. We are heavily involved in
the open-source software community through our open-source USRP? Hardware
Driver (UHD), and our support & use of the GNU Radio project & software.
*Career Information*
Founded in 2004 and acquired by National Instruments? in 2010, Ettus
Research? is an established company with solid financials. Competitive and
growing, we are looking for enthusiastic engineers to join our team.
Focused in the SDR market, we provide a dynamic environment where your
skills will be challenged & developed, and you will be able to work on the
latest SDR technology.
*Position Details*
This position opening is for a full-time Software Design Engineer. An
engineer in this role will be expected to tackle challenging software
design problems and drive development to completed solutions. Enthusiasm,
self-motivation, and creativity are musts. Design engineers are expected to
solve problems and complete tasks without heavy oversight, and identify &
solve new design challenges in a self-motivated fashion. Work hours are
flexible, we nurture a small-office setting, and employees receive full
benefits as well as competitive retirement / investment opportunities (401k
& ESPP).
One of the primary responsibilities of this position is the design,
development, and maintenance of the USRP? Hardware Driver. Additionally,
software design engineers are tasked with the bring-up & programming of
microcontrollers on new hardware, embedded system development
(Linux-based), development of digital control logic on prototypes, and
general product design.
*Candidate Requirements*
? Bachelor?s Degree (or foreign equivalent) in Electrical or Computer
Engineering, or a related field.
? Knowledge of RF / Wireless fundamentals.
? Experienced with software development on Linux-based operating systems.
? Solid programming ability with C / C++.
? Great software engineering practices.
*Recommended Experience*
? Skill with Python
? Knowledge of FPGAs / HDL
? Experience with GNU Radio.
? Prior work with SDR or communications systems.
? Master?s Degree or previous professional experience.
? Familiarity with electronics fundamentals.
*Re-Location*
New hires must be located in the San Francisco Bay Area, and work with the
engineering team in Mountain View, CA. If a new hire is currently located
elsewhere, Ettus Research? will pay for re-location to the Bay Area.
*Other Requirements*
Candidates must be eligible to work in the United States, although U.S.
Citizenship is *not* required.
*Availability*
We are looking for candidates to fill this position and start immediately!
*How to Apply*
Please submit your r?sum? / CV to [email protected].
----------------------------
Ettus Research, LLC <http://www.ettus.com/> | USRP <http://goo.gl/Ixjhh>
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