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二手仪器RACAL 6113G基站测试仪综合测试仪Opt. 04E 052 001 002 300 353 354 s/n 2352Increasingly the approach of testing on system simulators and then field trialling to check compliance prior to a new terminal launch or BTS software release is proving ineffective in identifying all the Interoperability Test (IOT) issues. The increase in GSM terminal vendors who don&t have easy access to BTS test labs also increases the likelihood that there will be small deviations in user performance between different network infrastructure manufacturers when using the same mobile device and vice versa. When interoperability problems are found in the field it is difficult to exactly recreate that scenario in the initial development environment and even more difficult to analyze the level of data necessary to identify the cause especially if the problem lies in tThe Two Way AIM is a member of the ProCLAIME series of Protocol test solutions and provides GSM AMR GPRS and EGPRS protocol monitoring and analysis. It sits between a BTS and mobile terminal passively monitoring all the protocol exchanges between the two devices on the Um interface such as the signaling and the raw traffic frames. This allows an IOT engineer to analyse in detail the actual information exchange between the BTS and Mobile terminal creating a quicker repeatable and deterministic method of investigating and solving IOT issues.The protocol monitoring process is carried out using the Racal Instruments Wireless Solutions (RIWS)6103G and 6113Gdigital radio test sets connected through an RF assembly providing a convenient duplex input point. The RF interface assembly accommodates a wide range of input levels from both the BTS and MS The mobile phone is plugged into the RF assembly together with a simplex or duplex feed from the BTS. The signal path from the BTS to the mobile is unaffected however the Two Way AIM is able to demodulate and log everything.