[time-nuts] Re: Data collection cycle -- multiple sources to one counter?

[Alberto di Bene]

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
coupled signals.

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