Re: 10 MHz reference inputs
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I'm not familiar with that model number. It appears to be a low end VGA amplifier of three 80MHz channels with four outputs per channel. It looks like at least two versions were built. Both have a toggle swich o terminate the inputs with 75 ohms, or to let you loop the inputs to another unit or channel. The fourth channel is low frequency, for composite sync only.
I contacted Exatron a few years ago about their analog video DAs. One of their engineers gave me the typical, "Our equipment is too complex to service outside the factory." when I asked about a schematic. Find the datasheet for the ICs they used in that model. You can easily understand their designs with the pinout and typical circuit drawings on the Datasheet.
Leon Robinson ?? K5JLR
Is anyone familiar with the Extron ADA 3 80? RBGS distribution amp and havea manual for it.
Political Correctness is a Political Disease.
Politicians and Diapers should be changed
often and for the same reasons.
On Saturday, September 10, 2022, 09:43:03 AM CDT, Kuba Ober via <kuba= [email protected]> wrote:
> now I'm faced with a new twist, a single connector marked 10 MHz In/Out? These units let you manually select ext or internal, but if the ref goes away for a moment, or the power is lost, the SG switches back to internal without notifying you, AND forces it's internal 10 MHz out on the cable, which distorts and beats against the 10 MHz being supplied, potentially screwing up any other instruments on that feed!
>?
> This seems totally insane to me.
It is insane (I¡¯m looking at you, Siglent). Someone thought they¡¯ll be very clever by saving a BNC connector. Probably a beancounter idea, although this may be giving them too much credit.
Once this hack appeared on some popular model, other companies started copying it without any thought given.
Cheers, Kuba
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Michael A. Terrell