HAMEG-HM8021-4-1-6 G Hz-Universal-Counter-Hameg-HM8021-4-P-The-universal-counter-HM8021-4-has-two-high-sensitivity-inputs-&-allows-the-measurement-of-signals-between-DC-&-1-6 G Hz-A-temperature-compensated-crystal-time-base-TXCO-ensures-the-exceptionally-high-stability-of-0-5ppm-per-degree-over-the-operating-temperature-range-As-a-universal-counter-the-HM8021-4-allows-frequency-period-pulse-duration-time-interval-measurements-&-event-counting-Hold-offset-&-auto-trig