11-10-2013 08:07 AM
Hi.
Basic flex-rio sampling question:
which modules can sample/generate 176MHz signal?
Thanks
11-11-2013 03:53 PM
Hi Yakir,
All of our FlexRIO Adapter Modules that are transmitters/transceivers are intended for RF applications and roll off below 200 MHz. There are two digitizers that might work for your acquisition side, the 5771 and the 5772. Also, there are two Active Technologies Signal Generators that might work for your application, the AT-1120 and the AT-1212. I attaching links to these products below. Hopefully this information is helpful!
http://sine.ni.com/nips/cds/view/p/lang/en/nid/210735
http://sine.ni.com/nips/cds/view/p/lang/en/nid/210736
http://sine.ni.com/nips/cds/view/p/lang/en/nid/211055
http://sine.ni.com/nips/cds/view/p/lang/en/nid/211053
11-11-2013 04:00 PM
11-12-2013 08:19 AM
Hi Yakir,
I wouldn't recommend this digitizer if your signal of interest is 176 MHz. Typically you will want to be able to sample at least twice as fast as the frequency of your signal of interest to accurately measure frequency. If you are interested in the shape of your signal, then you will typically want to sample at least 5 to 10 times faster than the frequency of your signal of interest.
08-13-2014 01:12 PM
Hello again,
I would like to re-ask my q:
Looking for a RF 50-176MHz transceiver, fpga/dsp based.
Are there any new/old products by NI for this purpose?
Thanks,
Yakir.
08-14-2014 08:51 AM
Hi Yakir,
Are you interested in doing baseband measurements or has your signal been downconverted already? Also, are you interested in sampling at 50-176MHz or acquiring at that rate? This will help determine whether we should look towards RF products or something like a high speed digitizer. Are you looking for a FlexRIO card, or will another form factor suffice? As far as RF products here are two that come to mind initially:
- NI Vector Signal Transciever: http://sine.ni.com/nips/cds/view/p/lang/en/nid/210635
Note with this device that the lowest frequency is 65 MHz, which I know is outside of your specifications that you stated.
- NI USRP RIO 2940R: http://sine.ni.com/nips/cds/view/p/lang/en/nid/212433
Hopefully these are helpful!
08-24-2014 06:53 AM
Hi and thanks for your answer,
Let me answer your Qs:
Are you interested in doing baseband measurements or has your signal been downconverted already?
I'm interested in direct sampling (and modifying) of the signal.
Also, are you interested in sampling at 50-176MHz or acquiring at that rate?
My CW is at 176MHz, so I think it would be preffered samplig at >500MHz
This will help determine whether we should look towards RF products or something like a high speed digitizer.
My application is not just for acquisition, but also for modifying the signal by its environmental errors.
I would prefer writing this controller using Labview & Labview FPGA Etc.
- NI Vector Signal Transceiver: http://sine.ni.com/nips/cds/view/p/lang/en/nid/210
This one is way over my budget per unit.
Note with this device that the lowest frequency is 65 MHz, which I know is outside of your specifications that you stated.
I don't care that the device will cover large BW, but it would be able to modify the RF signal at 176MHz in good performance.
- NI USRP RIO 2940R: http://sine.ni.com/nips/cds/view/p/lang/en/nid/212
This maybe worth to be checked.
Are there any FlexRIO stuff that may be relevant to my app?
Thanks again,
Yakir.
08-25-2014 05:52 PM
Hi Yakir,
Since you are interested in direct sampling, I believe the NI 5771 and 5772 FlexRIO devices are going to still be the best options for your system. Would these devices fit your application?
http://sine.ni.com/nips/cds/view/p/lang/en/nid/210
http://sine.ni.com/nips/cds/view/p/lang/en/nid/210
Thanks!