hi bill, i think all the boards you mention have analog bandwidth out to 2 GHz, so they should work well for your 1-2 GHz band.
the asiaa board is the least expensive, but this board does not have programmable attenuators like the Kat-ADC. the asiaa board can be used as a single 5 Gsps ADC, or as a dual 2.5 GHz ADC. we have used the asiaa board as a single 5 gsps adc, and it works quite well. but we have never tested it as a dual adc - perhaps others reading this email can give you advice about using it in dual mode. if you are using roach I, you can't get the 8 bit version of the asiaa board working at the full 5 gsps. if you are using roach II, you can use it at 5 Gsps. best wishes, dan On Thu, May 24, 2012 at 11:30 AM, Bill Petrachenko <[email protected]> wrote: > I'm designing a digital data acquisition system using a ROACH1 board. I need > to sample two Nyquist zones at 1024-2048 MHz. It appears that in the Casper > group of products, a pair of ASIAA, ADC1x3000-8, or KatADC boards would work > well and nicely interfaced to a single ROACH1 board (although the ASIAA > board is not mention explicitly on the web-site). Is there any reason to > choose one board over another? The gain adjustment stage is attractive on > the KatADC but the performance of the ADC1x3000-8 chip seems marginally > better at 2-GHz input frequency. The e2v chip seems less established than > the National chips. Is interleaving or calibration an issue for any of the > chips? > > I'd be grateful for any opinions on this. > Thanks, -Bill.
