HP 5315A / Agilent 5315A - 1 GHz Universal Counter

<p>The versatile 5315A has a range from 0.1 Hz to 100 MHz (on A &amp; B inputs). Time interval delay: holdoff, variable delay of nominally 500 microseconds to 20 ms between START" (on Channel A) and "STOP" (on Channel B). All measurements have up to 8 digit resolution (except totalize)."</p>