[time-nuts] What's the cleanest way to produce 1 and 5 MHz from10 MHz?

[J. L. Trantham]

If you want a 'vintage' solution, the HP 5087A can be configured to take a
single 5 or 10 MHz and divide/multiply it to 10 MHz, 5 MHz, 1 MHz and even
0.1 MHz then feed that to various output amplifiers of 10, 5, 1 or 0.1 for
up to 12 total outputs of your configuration.  However, you might be looking
for a long time to find all the right cards.

Joe

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of arie schellaars
Sent: Tuesday, July 28, 2009 3:40 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] What's the cleanest way to produce 1 and 5 MHz
from10 MHz?


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 <david.kirkby at onetel.net> wrote:

From: David Kirkby <david.kirkby at onetel.net>
Subject: [time-nuts] What's the cleanest way to produce 1 and 5 MHz from 10
MHz?
To: time-nuts at febo.com
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

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