E1 tester 2M Transmission Analyzer multi-functional and full- featured hand-held, LCD display, Data storage, PC supported E1 tester 2M Transmission Analyzer Always in stock!Specifications ItemDescription2MInternal Clock2048kb/s ± 10ppmFrequency Deviation±999ppmLine Interface75Ω (Unbalanced), 120Ω (Balanced); High Input Impedance >2KWLine CodeHDB3, AMIFramingUnframed, PCM30, PCM30CRC, PCM31, ...