Rohde-Schwarz-HM8123-3593-0545K02-Digital-Frequency-Counter-Rohde-Schwarz-3593-0545K02-P-The-Rohde-amp-Schwarz-HM8123-3593-0545K02-is-a-Digital-Frequency-Counter-which-features-three-high-sensitivity-inputs-&-allows-the-measurement-of-signals-in-the-frequency-range-between-DC-&-3 G Hz-P-P-The-HM8123-is-ideally-suited-for-test-installations-in-production-&-automated-tests-in-laboratories-It-supports-both-RS-232-&-USB (Universal Serial Bus)-or-an-optional-GPIB-IEEE-488-interface-&-can-be-easily