[time-nuts] Possible candidate for 10MHz sine distribution
Charles P. Steinmetz
charles_steinmetz at lavabit.com
Sat Jun 8 10:17:43 EDT 2013
>Probably not a good choice for 10MHz distribution. It's an NTSC
>composite video DA. NTSC composite video is relatively low
>bandwidth, typicaly 5MHz or so. Without complete specs in this DA,
>you can't rely on it having sufficient bandwidth, even for a 10MHz
>sine wave; certainly not sufficient for anything resembling a pulse
>or square wave.
Also, while the listing says the input and output impedances are
"standard 50 ohms," the manufacturer's datasheet specifies 75 ohms
(the NTSC standard):
www.megahz.com/specimages/Videotek/VDA-16-VDA-16A.pdf
It does not appear to have the headroom to handle a 1 Vrms (+13 dBm @
50 ohm) signal.
Best regards,
Charles
More information about the time-nuts
mailing list