[time-nuts] Re: Data collection cycle -- multiple sources to one counter?
Alberto di Bene
dibene at usa.net
Tue Jun 21 11:45:58 EDT 2005
Brooke Clarke wrote:
> A PIN diode is great for switching RF frequencies above the diode's
lifetime. But not so good at switching DC coupled signals.
> The FET type switches, like the MAX458 are designed for switching DC
Does anybody know what the HP 59307A uses ? It can switch from DC to 500
MHz and the measured DC resistance is on the order of 0.2 ohm. Looking
into the unit reveals that the switching device is shaped like a fat IC,
thermally coupled with the back panel.
73 Alberto I2PHD
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