Greetings Patrick, > Hello Tony, TKS for the interesting tests. Did you test PAX or PAX2? with > Unproto frames? > 73 Patrick
I used PAX2 with Unproto frames during the test. Haven't figured out how to test in the 'connect' mode yet. I just finished testing PAX "1" so please see below. PAX has a definite advantage in sensitivity over PAX-2 as well as the ability to print better when conditions are disturbed. There's a 3db advantage in sensitivity over PAX-2 when the criteria is based on 100% decode. But partial decodes at -6 and -10db vs. 0db and -2db would seem to indicated that PAX would do much better than PAX-2 in the ARQ connect mode. Would appreciate your thoughts on this Patrick... Tony, K2MO ________________________________________________________ PAX: Sensitivity threshold for 100% decode: -11db (no ionospheric distortion) Ionospheric Simulations. High-Latitude Moderate.........Complete decdoe @ -4db SNR. Partial decode -10db SNR High-Latitude Disturbed........NO DECODE Mid-latitude Disturbed.........Complete decode @ -4db SNR. Partial Decode @ -10db SNR Low-Latitude Disturbed.........Complete decode @ -0db SNR. Partial decode @ -6db SNR PAX2: Sensitivity threshold for 100% decode: -2db (no ionospheric distortion) Ionospheric Simulations. High-Latitude Moderate.........Complete decdoe @ +2db SNR. Partial decode 0db SNR High-Latitude Disturbed........NO DECODE Mid-latitude Disturbed.........Complete decode @ +1db SNR. Partial Decode @ -2db SNR Low-Latitude Disturbed.........NO DECODE HFPAcket (300baud): Sensitivity threshold for 100% decode: +1db SNR (no ionospheric distortion) Ionospheric Simulations. NO DECODE REGARDLESS OF SNR* * Susceptible to slight multi-path timing delays (< 1msec) and Doppler Spread (< 1Hz)
