Hi Folks, I am looking to see if there are local experts that could possibly bid on trying to fix a microwave link. I would also appreciate it if you could give me name/contact info for somebody you may know that has the expertise, but may not read this list. Please also cc John Wielgus (cc'ed here) on your replies. Thank you! Here follows the problem. The Astronomy department at UMass, Amherst has a microwave link from the campus to a radio observatory on the north shores of the Quabbin Reservoir. We have a 23 GHz microwave link with a LAN interface and a voice/phone carrier. The voice/phone system is working but the link has failed as a LAN link. Data is corrupted. M/A-Com (Microwave Radio Corp) components: MA-23VX T1&LAN radios at either end w/ MR-MIU LAN interface units (working on 2baseT) MR-23CX Rx/Tx pairs at intermediate station. (Mt. Lincoln) Problem: Data packets are observed in the IFs and basebands everywhere in the system, but the LAN digital components at either end are logging these as error/corrupt packets. Don't know how to analyze a packet in the IFs or basebands to check packet integrity to find where error/corruption is occuring. All transmit frequencies are within spec in frequency and power. IFs are all on frequency. Basebands appear okay, not perfect, but no worse than previous functioning condition. The voice/phone system is working fine. No noise, no static. Trying, at very least, to isolate problem to a component within the microwave analog system. Thanks for any pointers! Regards, Gopal -- Gopal Narayanan Ph #: (413) 545 0925 Research Assistant Professor Fax#: (413) 545 4223 Department of Astronomy e-mail: gopal at astro.umass.edu Univ. of Massachusetts, Amherst MA 01003