20 Calibration is Annoying Softrock input filter very inconsistentAntennas vary despite careful tuningCalibration accommodates inconsistencyUse of off-site signal best calibration strategyIn-shack calibration source seems almost good enough
22 Computer Requirements Just a guess based on my computerFaster than 1.5 GHzProbably 512 megabytes RAMPCI slot for the Delta 1010LTSerial or USB to control frequencyHuge hard drive if you want to make recordings
23 Software Requirements Linux or laterReal Time patchesJack Audio Connection Kit (JACK)DttSP (see dttsp.org for other requirements)SDR_Shell (ewpereira.org/sdr-shell)My phasing softwareNumerous other packagesEventually I will document installation
24 Advantages Continuously steerable Optimal – best RDF for the real estateFlexible – broadside, end-fire, circle, etc.Panoramic display is built-inMultiple outputs simultaneously
25 Disadvantages SDR versus traditional radio tradeoffs: Latency versus selectivityWide front end versus narrow front endIntegration: not just an antenna, it’s a radioLack of knobs
26 Future Work Active elements – facilitates experimentation 9 Element circle array5 Element end-fire arrayIntegrate receiving system with transmitterTransmit beam steering
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