... -held, LCD display, Data storage, PC supported E1 tester 2M Transmission Analyzer Always in stock!Specifications ItemDescription2MInternal Clock2048kb/s ± 10ppmFrequency Deviation ... , FAS, CRC4, CODE, E-BITSingle, Fixed Rate : 10-2, 10-3, 10-4, 10-5, 10-6, 10-7 Performance AnalysisITU-T G.821, G.826 ... 1 pc11. Product Qualified Certificate 1 pc E1 tester 2M Transmission Analyzer