Certification Standards V.2 Peter Woolner Noblis May 20,

CS V.2 Status NOAA has prepared a cover letter and will post CS V.2 on FedBizOps Certification Test Sets in development Several proposals raised to change CS V.2 – Most are positive but are not critical – I suggest it is not worth it to "rock the boat" Microcom has provided the filter coefficients to go in Appendix C of CS V.2 – Apply to Wallops receivers and the Test Sets 2

Filter Data 427 Tap Root Raised Cosine FIR, Fs= /Symbol Equation: A = Σ i n c i ∙s i Coefficients will be listed from -213 to

Impulse Response 4

When CS V.2 DCPs are Available Any existing V.1B 100 bps or 300 bps DCP could become a V bps DCP on the same channel it currently uses if NOAA agrees – Uses the new channel bandwidth (1/2 existing) – Less interference to and from neighbors – Opens two halves of new channels for expansion – Small performance reduction unless neighbors do not meet V.1B requirements if power unchanged – Some V.1B 300 bps DCPs may be suitable 5