Help abt modulation toolkit+ni 5640R

[sree_405]

Hi sir,
i need to generate some modulated(QPSK,BPSK,4-FSK AM, and GMSK) signals.
i think i can generate this signal by using modulation toolkit.
after generating these signal hoe can i communicate to ni 5640R target form my HOST system.
any simple procedure is there using this modulation tool kit.

Please to me how can use modulation toolkit for my appliction(getting modulated signal form ni 5640R card DAC output port).


Thanking you sir.

Sreenivasulu.O

[Speedy_Badger]

Hello Sreenivasulu,

The easiest way to use the modulation toolkit would be with the 5640R driver API which you can install for your NI-5640R. Both generation and acquisition VIs in this API manipulate IQ data, which the modulation toolkit uses. You can find this driver at the following location: NI-5640R 1.2 - Windows XP.

What is your application? Are you currently using the 5640R as a LV FPGA target? The modulation toolkit is not supported on the FPGA itself, however you can transfer the IQ information generated by the toolkit to the FPGA for processing using the normal LV FPGA programming techniques.

I see that you are currently working on this issue on several other threads;

Some errors in HOST.VI+ni 5640R

modulations +ni 5460R

Are these posts pertaining to the same question? Since these posts are in the IF-RIO support forum, you will most likely get the best support from that avenue.

Let me know more about your situation and we can try to assist you!

Regards,

[sree_405]

Hi Chris B,
Thanks for your reply.
i think allready you understood my problem.
i am unable to get output from card(NI 5640R)output.
now i am using ni 5640R IQ output example project,in that i am able to generate AM(i am using MT),but i am unable to get digital modulation.like QPSK,FSK,ook and GMSK.
if you have any idea these thing please help me.
if you any VI for generating(complex data) digital modulation please send me.
one doubt,i seen stream from disk,tell me how can i use that one,is it use ful for my application.
if any short ways are there please inform me.
why because i am asking like this short ways i need to generate modulated signals by this month 20th.if not leave this procedure.

thnaking you so much sir

Sreenivasulu.

[Andy_Hinde]

Here is an example that generates a PSK modulated signal with Modulation Toolkit, and then generates the signal out of the PCI-5640R.

Because the PCI-5640R doesn't have a large chunk of onboard waveform memory, the modulated signal must be streamed out of the 5640R, as shown in the code.

Regards,
Andy Hinde
National Instruments

[Andy_Hinde]

By the way, the title of the attachment says it generates QAM data, but it is actually using PSK modulation. This is an error in the title of the VI I attached. Sorry for the confusion.

Regards,
Andy Hinde
National Instruments

[sree_405]

Hi Andy Hinde Sir,

 Thanks for your reply with "ni5640R Generate QAM.VI".i tried that one.i faced some problem while running.
1.Here i am attaching that images please correct me.after running it generated signal but  not generating continuously.before going to while loop(after ni5640R initiate.vi)it generated signal,but  within secons it disappeared.i am connecting ni 5640R crad output channel 0 to CRO and   checking signal  in CRO.after while loop it is showing some error.here i am attching that error image(error1.jpg) please check it.

2.i changed this VI to FSK.after running it shown this error sir.here i am attching that error image(error2.jpg).
is it correct sir,can i chenged(means PSK to FSK or ASK Etc) like this or not.
Please tell me sir by using this VI how can i generate continuous signal.
one more doubt sir ,i am using this VI directly.i am  not yet adding to any project.i am correct or any procedure is there sir like HOST.VI ans FPGA.VI.

Thanking you so much sir


Regards
Sreenivasulu.O

[sree_405]

Hi Andy Hinde,
i am sreenivasulu.please reply me for prevouse post sir.
sir one more Q?,ni fgen  and ni RFSG is supported for ni 5640r card


thanking you sir
Sreenivasulu


Message Edited by sree_405 on 03-18-2008 09:47 AM

[Speedy_Badger]

Hello Sreenivasulu,

There are two methods available to you for developing with the 5640R. The first method is to use the 5640R driver and the corresponding API. This provides a fixed personality to the device and gives you a developed API which you can use to develop input and output functionality similar to a function generator or digitizer.

The second method is to use the 5640R as a LabVIEW FPGA target. This means you will be developing your application in the LV FPGA environment with the tools provided by that module. 

That being said, FGEN and RFSG are standalone device drivers and APIs meant to support their class of instrumentation. You can find out which devices are supported by these drivers at the following websites:

NI-RFSG
NI-FGEN

I hope that helps!

Regards,

[sree_405]

Hi Chris B,

i am sreenivasulu.i have one doubt regarding voltage levels.
The range of the output from the ni 5640r card  is 0.8 V pk-pk.
it is fixed.if i want increase what i have to do and if i want to decrease what i have to do.
please reply me sir


Thanking you sir

[Speedy_Badger]

Hello Sreenivasulu,

The 0.8 V pk-pk (2 dBm peak) full range of the 5640R is fixed. You can modify the gain (scaling) of your digital data in relation to this full range in your application. From the looks of your application you have modified the PSK example provided by Jerry. This Already has the scaling built in via the "Output Scale Factor [0, 1.99]" control on your Host front panel.

Regards,