The Tektronix DC 508A counter measures frequencies
from 10 Hz to 1.3 Ghz. Frequencies from 10 Hz to 100 MHz are measured using the
direct input and from 75 MHz to 1.3 Ghz using the prescaler input. The counter
also totalizes events from 0 to 999,999,999. Nine 7-segement led provide a
visual numerical display which allows resolution of 1 kHz to 1 Hz (0.1 Hz when
using direct input). The decimal point is automatically positioned and leading
zeros to the left of the most significant digit or decimal point are blanked.
