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* Functions: Frequency, events | * Functions: Frequency, events | ||
==Options== | ===Options=== | ||
* Option 1 − High accuracy time base | * Option 1 − High accuracy time base | ||
* Option 7 − Accepts rear panel control signals from a [[TR502]] or [[SW503]] to measure a marker frequency. Resolution and gating remote control circuitry is added to the DC508(A). Requires a [[TM503|TM503 - option 7]] or an appropriately modified mainframe. This option inherently also adds option 1. | * Option 7 − Accepts rear panel control signals from a [[TR502]] or [[SW503]] to measure a marker frequency. Resolution and gating remote control circuitry is added to the DC508(A). Requires a [[TM503|TM503 - option 7]] or an appropriately modified mainframe. This option inherently also adds option 1. |