Re: [Elecraft] XG3 Question
Just realized that the K3 internal voltmeter might be of use since it is obviously frequency selective. I could put the XG3 (or better yet, the already owned XG2) at the far end of the line after calibrating it in the shack against the K3 then measure the signal on the K3 display and the line loss would be the difference of the two. I think I just saved some money! More to spend on QSLing! woo hoo!! jim ab3cv __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] XG3 Question
After lugging my HP8640 up the stairs again last night (ugh) to act as a source for doing some feedline loss measurements I thought again about getting an XG3 for this purpose. I have an XG2 but its max output is only -73dBm. I downloaded the manual and looked at it and the schematics and realized there is no output filtering rather a square wave is emitted. So if used with a broadband power meter (like the PIC Power Meter) the PPM would receive not just the fundamental but the whole spectrum emitted by the XG3. So if used for loss measurements it would seem that a short bit of cable might allow the harmonics to contribute meaningfully to the received power yet a long cable would attenuate the higher harmonics to a greater degree and give an incorrect impression of the loss at say 7Mhz. Seems like this device is only useful then with a tuned receiving device. Do I have this correct? tnx jim ab3cv __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] XG3 question
Edward and other who responded, I appreciate your response. As it turns out the problem with the FM receiver(s) turned out to be something simple. I was looking forward to some serious old fashioned troubleshooting. The receivers are from a language translation system. Other than one set of dead batteries the problem was that the end of battery holder in the other five receivers would become compressed after changing the batteries several times and the batteries were no longer making contact. Bending the holder back in shape corrected the problem. Now to go work on an 80 meter coil for another project. Again, my thanks to every one who responded. 73 Jim, W0EM -- View this message in context: http://elecraft.365791.n2.nabble.com/XG3-question-tp6949013p6952334.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] XG3 question
Jim, Kurt is correct (I will expand on his suggestion). First you should find the center frequency of your radio (72.9 MHz). ON the main window of the XG3 Utility Press window 2 and then Press "edit". Enter the center freq. in the window labeled 2.Press "Apply" and then "OK". The freq that you found that quieted the radio will be shown as current freq. at the window at the top. The XG3 outputs a carrier which will quiet an FM radio when the signal is strong enough. Set output level to -73 dBm should work or use -33 dBm. I found I could radiate enough -33 dBm signal with a rubber duckie antenna connected to the XG3 place near my 2m FM radio for it to pick up the signal. Once you know that enter a frequency offset from that until the radio is no longer quiet. Use these two frequencies in the scan window (PRESS the edit sweeps button). Enter the first freq in the "Start Freq" window and the second freq in the "Stop Freq" window. Enter .005 for Step Freq then Enter 100 (ms) in the Step Time window. Check "Repeat" and "OK". ON the main window of the XG3 Utility Press PF1 or PF2 depending on which you set up and the XG3 will begin to rapidly step in freq and you should hear it go from a fully quiet to a noisy signal to full noise and you will hear a "pop-pop-pop" as the XG3 scans. -- Message: 32 Date: Sun, 30 Oct 2011 23:12:29 -0500 From: Kurt Pawlikowski Subject: Re: [Elecraft] XG3 question To: Jim Harris Cc: Elecraft Email Message-ID: <4eae202d.2090...@pinrod.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Jim, To add to what Mike said in the reflector, and, as I understand it, you can make the XG3 scan between two set frequencies. I suspect that, if you set those frequencies fairly narrow and within the band pass of the receiver, you should get some buzz (I suspect some sort of saw-tooth). Of course, I don't know how fast it would scan, but I would think that you should be able to detect it. Hope that helps until someone with hands-on experience can reply... Regards, kurtt Kurt Pawlikowski, AKA WB9FMC The Pinrod Corporation ku...@pinrod.com (773) 284-9500 http://pinrod.com 73, Ed - KL7UW, WD2XSH/45 == BP40IQ 500 KHz - 10-GHz www.kl7uw.com EME: 50-1.1kw?, 144-1.4kw, 432-QRT, 1296-?, 3400-? DUBUS Magazine USA Rep dubus...@gmail.com == __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] XG3 question
Jim, To add to what Mike said in the reflector, and, as I understand it, you can make the XG3 scan between two set frequencies. I suspect that, if you set those frequencies fairly narrow and within the band pass of the receiver, you should get some buzz (I suspect some sort of saw-tooth). Of course, I don't know how fast it would scan, but I would think that you should be able to detect it. Hope that helps until someone with hands-on experience can reply... Regards, kurtt Kurt Pawlikowski, AKA WB9FMC The Pinrod Corporation ku...@pinrod.com (773) 284-9500 http://pinrod.com On 10/30/2011 20:55, Jim Harris wrote: > Hi, > I have a need for a 72.9 MHz signal source that can be heard on an FM > receiver. The question is does the XG3 cover that frequency and can it's > output cause any kind of an indication on an FM receiver. I'm not looking > for intelligent audio from the receiver.just a buzz, hiss of anything to > indicate that the source is being received. > Thanks in advance. > > Take pride in the USA. 73 > > > > Jim, W0EM > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] XG3 question
Hi Jim, I don't have an XG3 but from the elecraft page it looks like it works on frequencies above what you are looking for so it should work for you. With an FM receiver you will hear quieting when the carrier from the XG3 is on the frequency your receiver is tuned to. Often FM receivers are somewhat broad so if your purpose is to tune it to a particular frequency just listening to a signal on frequency may not do it. If your FM receiver is fixed frequency (and known to be on frequency) then the signal from the XG3 should let you know it is working. 73 - Mike WA8BXN __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] XG3 question
Hi, I have a need for a 72.9 MHz signal source that can be heard on an FM receiver. The question is does the XG3 cover that frequency and can it's output cause any kind of an indication on an FM receiver. I'm not looking for intelligent audio from the receiver.just a buzz, hiss of anything to indicate that the source is being received. Thanks in advance. Take pride in the USA. 73 Jim, W0EM __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
