... clock/signallReal-time transmit circuit open/short indication2) Datacom testinglDatacom (V.24, V.35, V.36, X.21, RS-449, RS-485, EIA-530 and ... and monitoringlFrequency and offset measurementlClock source: Internal, Interface selectable4) Protocol converter testingl2M-Datacom SYNC 64k or N×64kb/s BER testingl2M ...