Trans-receiver system using PXI

Hi,
I need to build a trans-receiver system using PXI. For the transmission part I can use a PXI 5652 to generate a single tone continuous waveform.
For the receiver part, I need an antenna to capture the signal transmitted by 5652 (which will have a transmission antenna ). The received signal will then be down converted by PXI 5601 (RF OUT of 5652 is connected to LO IN of 5601). The intermediate frequency will be then digitized by PXI 5622 (IF OUT of 5601 is connected to IF IN of 5622).
But my question is these connections are already there between the slots/chassis.(The next stage has I/Q demodulation but I want to get clear on this part first). But there is not output port on the PXI 5622, so how can I check the digitized output?
I have attached a file for reference.
Thanks,
Sharmi
Attachments:
Ref.docx ‏689 KB

Hi Sharmi,
To address your questions:
Is the data, after it is down converted and digitized by the 5622 is automatically sent to 5450?
No, the data is not automatically sent to the 5450. The digitized data is sent to the backplane and can be accessed on your controller/laptop through LabVIEW or the RFSA Soft Front Panel. The 5450 is used to take digital signals generated by LabVIEW and turn them into an analog signal. It is not used in any part of the downconversion process.
If you want to take the data that you receive from your 5663 VSA and send it to your 5673 VSG, you will need to do so using software. There are RFSA and RFSG examples that ship with the driver that you can use as a starting point on how to acquire a signal and send a signal using LabVIEW. These examples can be found by going to Start » All Programs » National Instruments » NI-RFSA (or NI-RFSG for generation examples) » Examples.
5450 has “400 MS/s I/Q Signal Generator” written on it, so does it generate I and Q channel data separately?
The 5450 does generate IQ data on 2 separate channels. LabVIEW is used to generate an IQ bit stream. The IQ data is combined after being upconverted with the 5611.
Also 5611 has “I/Q Vector Modulator” written. So, can it demodulate a signal (after it is split into I and Q components by 5450) and then combine the resultant output?
The 5611 is an upconverter and is used to take the IQ signals generated by the 5450, combine them, upconvert them from some IF frequency to an RF frequency and transmit them. It can be used to do some basic types of modulation, but not demodulation. The NI RF Signal Generators Help ( Start » All Programs » National Instruments » NI-RFSG » Documentation) has a section about the 5611 that includes the hardware block diagram and a more detailed explanation about each part of the block diagram. This is where you can find out more about what basic types of modulation the 5611 is capable of performing.
Let me know if you have more questions, I'd be happy to help.
Sarah Y
SDR Product Manager
National Instruments | Ettus Research

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