From the FAQ: Q41. Will the FLEX-5000 meet NTIA specs for use on federal government frequencies, such as for use by MARS, Civil Air Patrol, and USCG Auxiliary?
A. The standard FLEX-5000 models A & C have frequency accuracy of 0.5 ppm and the D model will have 0.005 ppm. We have not tested outside the amateur bands yet so we would need to do that testing to confirm compliance with the Redbook. --- Having gone through this in a related connection, I'd caution that there's quite a bit more to Redbook compliance than frequency accuracy. There's also a spurious signal mask that is fairly tough to meet, on both Tx and Rx. I'm pretty sure that the Flex can get there, but verification might be challenging. NTIA might also have some requirements with respect to verification of the software version and calibration parameters(i.e. that the software load you are using is the same as the one you met the specs with) Section 5.3.1 of the Redbook has all the specific requirements. e.g. carrier suppression >50dBc if it's more than 3x signal bandwidth away... the 50 microwatt maximum spurious emission (-13 dBm) regardless of transmitter output, etc. This last one is potentially tough.. radiate 100W (+50dBm) and you need have ALL spurious signals down 63 dB (that includes things like the image) On receive, life is a bit easier.. there's only a "slope of the filters" requirement, but a question remains of "how far does that slope go" James Lux, P.E. Spacecraft Radio Frequency Subsystems Group Flight Communications Systems Section Jet Propulsion Laboratory, Mail Stop 161-213 4800 Oak Grove Drive Pasadena CA 91109 tel: (818)354-2075 fax: (818)393-6875 -------------- next part -------------- An HTML attachment was scrubbed... URL: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/attachments/20070416/85e0929a/attachment.html _______________________________________________ FlexRadio mailing list [email protected] http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
