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I have heard that a popular solution is to use inexpensive video distribution amplifiers after changing the terminations from 75 to 50 ohms. This is what I was planning to do as well.

Dave Casey

On Mon, Oct 23, 2017 at 11:43 AM, 'Paul Bicknell' paul@... [hp_agilent_equipment] <hp_agilent_equipment@yahoogroups.com> wrote:

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Hi

Regarding ddistribution divider/amplifier for 10 MHz in the past I have talked to others on this subject and the

consensus was that the frequency response of the amplifier must be grater than 10 times ?that of the reference frequency to prevent distortion and lag

we ended up using transistors that where good for 450 MHz for a 10 MHz reference

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regards Paul B

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From: hp_agilent_equipment@yahoogroups.com [mailto:hp_agilent_equipment@yahoogroups.com]
Sent: 23 October 2017 13:39
To: hp_agilent_equipment@yahoogroups.com
Subject: [hp_agilent_equipment] Distribution divider/amplifier for 10MHz GPSDO

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Hello group. I`m intending to distribute, via 50 Ohm coax, frequency reference signals to my test equipment in my test bay [no relation to eBay, except that most of the equipment came from there]. I`ll be using RG58/U coax, and 50 ohm terminations, with the highest reasonable signal level reticulated. Given that the name of the game seems to be to avoid any severe reduction in SNR of the 10MHz signal comming out of the GPSDO, by the logic dividers, and impedance lowering buffer amplifiers, what considerations should be made regarding the choice of logic families, and transistors to be used? The frequencies required by the test equipment vary from 500kHz to 10MHz, and amplitudes from 100mV P-P sinewave, to 5V peak squarewave. How good must the PSU be to stop the rot getting worse, and is 1/f noise in the active devices important? Your thoughts will be appreciated.

P.S.: How accurate is the Trimble Thunderbolt for this application?..............................................Thankyou,............Don Collie.

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