Received on Sat Mar 02 2024 - 00:57:20 CSTWhen I perform a sweep I keep a written notebook of everything i can see, do, smell, say, measure, adjust etc. In cases where I use a standard set up and methodology I reduce these to large forms so that I can document the process of actually how the sweep was performed, how the equipment was set up, position in the room, along with a time stamp on every page, etc. In the event that I find something that is either a threat, hazard, or penetrations I photograph everything, the settings on the equipment, how the antenna is positioned, the trace on the TDR,etc. Then I try to get some kind... any kind of hard copy from the instrument, and download the data of the test, reduce all of it to hard copy and insert it into the log book. For example, lets say that I am using a Tek 494 A/P Spectrum Analyser, if I find a signal of interest that I am reasonably going to suspect is a bug, I will have a journal of how I set the equipment up, and the 1200 previous signals I have logged. SO then I realize that I have a really interesting signal I pop pictures of the instrument screen, then the controls, then both the controls and the display, then the laptop, the cables, the amps, etc. I then directly hard copy to a dedicated plotter and make at least 3 copies of everything. Then download all the computer collected data to three external sources, and then dump the data to paper. When I am doing my "ladder walk" or the physical inspection of an office I write down and document everything, and I fill 300 pages of "found artifact" pages on even a small room. -jma At 09:23 PM 8/12/2008, kondrak wrote:Thanks James. Im contacting the guy right now, for more details, settings etc. Yes, I was worried the attachments might be too big, so I shrunk them in photoshop, and just pasted them inside the text box. Now that I know, I know, thanks. When Pete gives me more of the info from the readings he took, Ill pass it along. Hes a competent tech in his own right, but he was short on the settings he used. Hes thinking now its some sort of home-plug signal, but I dont think its homeplug above 20 meter ham band. James M. Atkinson wrote:When you post pictures of a signal to the list, please post one image per posting, or you risk the post either bouncing, or list subscribers not getting the images as there are too many attachments (one picture per post, but you can make 15 posts if you like withno problem).Also, please, please, please remember to show us or tell us what the setting are on your spectrum analyzer or scope, for example, what is the dispersion (span) or what we are looking at, what IF BW were you using, what Video BW, what was the refresh rate? Also, try to measure and define the bandwidth of what we are looking at, then set your IFBW to approximately that BW (as close as you can get), and show some shots of the screen in zero span mode so that we can see the signal in the time domain. Also, zoom out more, and show us more of the spectrum, or at least go up and down a few screens so we get an idea of what else is onthe airwaves.On initial impression it looks like leakage from a broadband network, but you need to provide a ton of additional information in the signals. -jma----------------------------------------------------------------------------------------------------World Class, Professional, Ethical, and Competent Bug Sweeps, and Wiretap Detection using Sophisticated Laboratory Grade Test Equipment.----------------------------------------------------------------------------------------------------James M. Atkinson Phone: (978) 546-3803 Granite Island Group Fax: (978) 546-9467 127 Eastern Avenue #291 Web: http://www.tscm.com/ Gloucester, MA 01931-8008 E-mail: mailto:jm..._at_tscm.com----------------------------------------------------------------------------------------------------We perform bug sweeps like it's a full contact sport, we takeno prisoners,and we give no quarter. Our goal is to simply, and completely stop the spy.----------------------------------------------------------------------------------------------------
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