guoan August 3, 2015 at 8:23 pm
- This topic was modified 8 years, 1 month ago by guoan.
I noticed that there is a BB_DIRECT_RF flag in bb_api.h, could you please give me an in-depth description on it.
Does the L.O. stoped in directRF mode? Can we get the data stream samples using bbFetchRaw() API function? What’s the freq. range during which directRF can apply ?
Thanks a lot.
AndrewModeratorAndrew August 4, 2015 at 9:29 am
You can use the BB_DIRECT_RF flag in this manner,
bbInitiate(handle, BB_STREAMING, BB_DIRECT_RF);
In this mode you will receive 80MS/s 16-bit direct RF samples. In the frequency domain, you will measure frequencies from 0Hz to 40MHz, but there is a low pass filter that is roughly around 27MHz. The LO conversion stages are bypassed in this mode, resulting in exceptional RF performance. The samples are full scale.
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