I'm interested. BTW, good work!
Joe -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Monday, November 19, 2012 1:53 PM To: [email protected] Subject: Re: [time-nuts] Nifty "MINI TIC" for DMTD work Don lets see how much interest and which counter and in the 2 channel it is 3 PIC's and 1 G/A and the 4 channel 5 PIC's and 2 G/A. Easy to solder Juerg and I are 70+ so soldering is a key consideration Bert Kehren. In a message dated 11/19/2012 2:48:39 P.M. Eastern Standard Time, [email protected] writes: uh, ok, how do we order the boards? Don L [email protected] > > "MINI-TIC" for DMTD work > > > Hi Everyone! > > I've been testing a Miniature 2 channel TIC that Bert Kehren and > Juerg Koegel and Richard Mc Corkle have designed. > > It has 9 digits/Sec. and with a 1HZ offset in the DMTD unit gives a > resolution of 1X10-15th at 10 MHz, 2X10-15 with a 5 MHz input, when > measuring Allan deviation. The 200 MHz version doubles the > resolution. > > Of course the baseline performance of the DMTD unit and the stability > of the DMTD reference determines the actual accuracy you can obtain. > > (My dual mixer has a baseline of approx. 8X10-14th at 1 second and my > best reference is 4X10-13th at 1 second.) > > The "MINI" takes a 5 or 10 MHz reference that only has to be stable > to parts in 10-8th/sec. > I used a neat 14PIN ovenized DIP clock chip I got on eBay and > recently discussed on the list. > > The reference is multiplied to 100Mhz for use as the counters clock. > > The "MINI" is about 2.5 by 2 inches and has only 5 chips. Two opto > couplers an op amp for two analog channels are also on the board. If > run on 5 volt a > 3.3 V > regulator is also on the board. Power required is +5VDC 0.05 A and > +- > 12 > > (for the RS232 interface) > > It also has two pins you can individually ground to measure the > period of the beat note from either channel. > > This allows you to adjust the offset frequency quickly and accurately. > > I installed the "MINI" into a 1U chassis with the power supply and > also added "heartbeat" LEDS for each channel to show the presence of > the 1PPS inputs. > > I have plotted several Rubidium and many Quartz using the "MINI" > simultaneously with a SR620 counter/timer. The plots are "identical"! > So much so that I am going to "retire" and sell my SR620! > > I understand work is complete on a 4 channel counters and Bluetooth > interface, and work is ongoing on a LCD. > > The "MINI" material cost is less than $25.00 depending on how many > boards are ordered! > > Resoution based on clock frequency and beat frequency: > > Carrier[MHz] Beat [Hz] Heterodyne TIC [ns] Resolution > 10101.00E+06101.00E-14 > 1011.00E+07101.00E-15 > 1011.00E+0755.00E-16 > 10101.00E+0655.00E-15 > 5105.00E+05102.00E-14 > 515.00E+06102.00E-15 > 515.00E+0651.00E-15 > 5105.00E+0551.00E-14 > ____________________________________________________________ > Woman is 53 But Looks 25 > Mom reveals 1 simple wrinkle trick that has angered doctors... > http://thirdpartyoffers.juno.com/TGL3141/50aa82cb1214a2ca03f8st04duc > _______________________________________________ > time-nuts mailing list -- [email protected] To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > -- "Neither the voice of authority nor the weight of reason and argument are as significant as experiment, for thence comes quiet to the mind." De Erroribus Medicorum, R. Bacon, 13th century. "If you don't know what it is, don't poke it." Ghost in the Shell Dr. Don Latham AJ7LL Six Mile Systems LLP 17850 Six Mile Road POB 134 Huson, MT, 59846 VOX 406-626-4304 www.lightningforensics.com www.sixmilesystems.com _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
