is very low and can be seen in a spectrum analyzer as a flat line. For my project, i need to use cellular TX power in order to know when i'm coming closer/further to the phone, and for now it's working only if i make a call for example, or even download something off the internet. My question is if there is a way i can make a phone come out of it's rest when i'm not a part of the cellular network? Thanks a lot, Meny

Radio software and USRP radio hardware, which uses GSM base station signals as a standard to measure the frequency offset of the USRP's oscillator. It's not really a time-nutty application, but it serves as an example of using cellular base stations as a frequency reference. http://thre.at/kalibrate/ GNU Radio is a free open-source development environment for implementing software-defined radios. The USRP is one of the more popular RF hardware options for use with GNU Radio. http://gnuradio.org/redmine/wiki/gnuradio -- Mark J. Blair, NF6X Web page: http://www.nf6x.net/ GnuPG public key available from my web page.

2011 at 7:25 AM, Raj wrote: > TimeNut folks, > >        A thought occurred to me that there should be a way to lock our OCXO/TCXOs to cell phone services signals that that is present almost everywhere. I am not conversant with cellular technology so I am curious! > >        Any ideas and/or thoughts? > > Cheers > > -- > Raj, VU2ZAP > Bangalore, India. > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > -- ===== Chris Albertson Redondo Beach, California

systems work just fine at> 1.0 x 10^-8 off frequency. You > have to keep the slots lined up between them, but as long as everybody > agrees on alignment, they keep running fine. There's a lot that you can get > away with and still be providing a dial tone. GSM and hence UMTS has 50 ppb requirements in the base station frequency. For GSM no timing is required, but synchronisation of several base-stations has been shown to improve hand-over performance. Depending on the operator you tune in to, it may or may not be locked to GPS or similar... but may also run from caesium beams somewhere completely different, if so you are only guaranteed 1E-11 in frequency long-term. There is many systems, and you also need to tune in to the right signal. GSM for instance may frequency jump regularly. Digital TV signals may be also be used. Depending on which mode the network operate in the transmitters may be undisciplined or locked to GPS directly or indirectly. DVB-T for instance has regular pilot-tones in the spectrum. A DVB-T receiver is a nice exercise... :) It's possible, but not trivial. Cheers, Magnus

't it? I have uploaded a couple screen captures here: http://hammondorganservice.com/downloads/images/Emerald-Sequoia.jpg http://hammondorganservice.com/downloads/images/Emerald-Sequoia2.jpg A description of how it works is here: https://emeraldsequoia.com/et/index.html Don Resor N6KAW

Unless you use a hydraulic press box crimping die set, there will be voids. I have the hand opeated dimple die crimper tool and have cut a section of a "good" crimp to see. Examination under a microscope reveals voids. For this reason I prefer the closed end bell style and use of an anti-oxidant paste.

Probably the source code was thrown >> out with the old servers that were sold for scrap... or just carted off >> to be shredded with all the other paper and electronic records... >> >> Horror stories abound about organizations that need to make some >> minor patch or change to source code of a popular product for some >> important customer even just a few

Not sure if those pings would have been sent > via a low gain antenna on the AES, but I suspect normally not. > > -- > Dave Emery N1PRE/AE, die@dieconsulting.com DIE Consulting, Weston, Mass > 02493 > "An empty zombie mind with a forlorn barely readable weatherbeaten > 'For Rent' sign still vainly flapping outside on the weed encrusted pole - > in > celebration