I'm also in agreement that ECals can be trusted.? I have 5 and they are all bang on against there own verification data to better than 0.05dB and only a few deg phase out to 20GHz which is better than I can achieve with my mechanical kits.? Since the verification data in the module never changes calibration can always be trusted as long as it matches post calibration. ?
Most certainly re-calibration will be required if any of the connectors are replaced, in fact its easy to confirm if the specs have changed.
In fact Joel Dunsmore says in his book (page 153) "Since the fist introduction, the quality, capability and convenience of Ecal has been greatly enhanced and now its use may exceed that of the mechanical calibration kits"
Bruce, It has been a year or two since I opened my 85060C but I recall it has an embedded PC with a 80286 processor and a Cyrix co-processor (apparently it has some math homework to do!).? I'm not sure if it runs DOS or not, but the files on the firmware diskette cant run from a DOS environment
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Wayne
