Forums › BB Series Discussions › Spectrum recording
- This topic has 1 reply, 2 voices, and was last updated 6 years, 6 months ago by Andrew.
Tom JohnsonParticipantTom Johnson September 3, 2016 at 2:38 pm
I’m looking at using a BB60C to capture I and Q samples of various signals from 4 KHz BW to 40 MHz BW. Then we’ll want to post-process the data ourselves. From everything I can tell on the spec sheets this seems feasible. The only question I have is the timing accuracy. I’ll need to time stamp the input data very accurately (within ~5-10 ns). I’ll can provide a high accuracy GPS disciplined Cesium reference oscillator to ensure that there’s a suitable reference available. Can the BB60C handle this time of a situation?
AndrewModeratorAndrew September 6, 2016 at 8:40 am
If you need time stamping from a GPS, you can accomplish this but will need to utilize the C programming interface to accomplish this. Our desktop software does not expose this functionality. If it is interesting to you, a future update to our software will allow long IQ recordings with system time stamping (non GPS). I would expect this in the coming weeks to months.
Using an external GPS and our programming interface, you can expect time stamping with a resolution of around 50ns at the highest sample rates (40MS/s IQ). There is a code example of performing this on page 45 of our programming manual, which you can find linked here,
It uses a deprecated function (bbFetchRaw) which has been replaced with bbGetIQ, but otherwise would remain the same if you decided to implement this.
If you have any additional questions let me know.
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