Hi people I too needed a 1MHz reference to drive my HP5245L counter. I simply fed the t.bolt's 10 MHz output into a single transistor amp to obtain 5V p.p and divided down using a TTL 7490 chip. This I followed with a six stage Chebichev 1Mhz low pass filter to "knock-off" the rough "corner" spots and this fed into the counter. It all seems to work with accurate readings from a known frequency source out of the counter. It's simple but perhaps not too elegant Cheers Arie VK3DBF
--- On Tue, 28/7/09, David Kirkby <[email protected]> wrote: From: David Kirkby <[email protected]> Subject: [time-nuts] What's the cleanest way to produce 1 and 5 MHz from 10 MHz? To: [email protected] Received: Tuesday, 28 July, 2009, 12:32 AM A friend of mine has a GPS receiver with a Stanford PRS 10 rubidium as a frequency standard he uses for his test equipment - mainly signal generators, spectrum analysers etc. Most kit takes a 10 MHz sine wave. Some of his kit needs 1 MHz and other bits 5 MHz. What is the cleanest way to derive these frequencies from 10 MHz. I would suspect a number like 10, which is not a power of 2, would present more of a problem. I don't know what kit he has that needs 1 or 5 MHz,so I don't know how fussy it is. Dave _______________________________________________ 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. ____________________________________________________________________________________ Access Yahoo!7 Mail on your mobile. Anytime. Anywhere. Show me how: http://au.mobile.yahoo.com/mail _______________________________________________ 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.
