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Part Number: AWR1243
Is the 15 MHz IF bandwidth defined as the -3 dB point, -6 dB point or the where the gain just starts to roll-off of the LPF ?
The Radio bandwidth is based on the passband of the FIR filters within the Digital Front End (DFE) portion after the AtoD converter. This is < 1db of passband ripple at this point.
The DFE has 2 sets of Decimation filters, with adjustments to select the optimal sample complex or real sample rate, with the 80% band FIR filtering. The DFE contains decimating filters, and resamplers.
There are several DFE processing modes, for real , complex 2x, and complex 1x. Complex 1x is a shifted frequency spectrum 0 - Fs. Real and Complex 2x are the traditional radio equivalent signal processing modes.
Here are two examples:
ComplexADC sampling, DFE 1st stage out - 100Msps, Complex 1x mode, DFE 2nd stage out- 6.25Msps, 5Mhz BW
ComplexADC sampling, DFE 1st stage out - 200Msps, Complex 2x mode, DFE 2nd stage out- 18.75Msps, +/-7.5Mhz BW
ComplexADC sampling, DFE 1st stage out - 200Msps, Complex 1x mode, DFE 2nd stage out- 18.75Msps, 15Mhz BW
RealADC sampling , DFE 1st stage out - 200Msps, Real mode, DFE 2nd stage out - 18.75Msps, 7.5Mhz BW
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In reply to Radio-Joe:
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