Hi Mike,
Sienna design goals (not final specs):
MDS: -130dB (preamp off)
IP3: +25dBm at 5 kHz spacing; preamp off
Blocking Dynamic Range: >125 dB at 5 kHz spacing
2-Tone Dynamic Range: >90 dB at spacings >= 5 kHz
http://www.getboost.com/dz/sienna_specs.htm These are nothing great. If they were at 1-2 kHz
spacings they would be getting close to Orion. But
then you have a little issue with phase noise, which
Ten-Tec uniquely addresses in Orion's synthesizer design:
http://radio.tentec.com/cms-files/565_syn_article.pdfK2, IC-7800 and I suspect FT9000 (no close-in data
yet) all fall apart at <2 kHz spacings due to phase
noise issues. Note the "f" footnote in the second
column from the right below.
"Measurement was Phase-Noise Limited rather than
intermodulation limited"
http://www.sherweng.com/table.html 73, Bill W4ZV
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