KCC's Quizzes AQQ304 - A pure logic
1. Quote of the month: "I am not lazy, I'm just in energy-saving mode" - unknown
2. Quiz AQQ304 about finding a pure logic puzzle
Mike is looking at Anne, but Anne is looking at Paul.
Mike is married, but Paul is not.
Question:
Is a married
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August Monthly Blog Quiz! Read the blog, take the quiz, and you could win a gift card
Important: Read the blog first . The quiz questions are all based on the content of the blog:
Stay in the loop and win! Read the blog Current Output Driving Industrial Loops , then take our quick five-question quiz for a chance to win a gift card
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I have built the FMCOMMS2 HDL code and I have a few questions.
1) Where is the best place to get information on what the AD IP modules do and their interface (read the code maybe?)
2) What AD937x interface mode is being used to talk to the IP (FDM dual port?).
3) Where would be the best place to get access to the TX and RX stream in a deterministic way?
Bit of background. I am trying to add a simple Transmitter Digital Pre-distortion module to the AD HDL code.
To do that I need access to the TX samples and RX (tx monitor) samples, the TX and RX samples need to
maintain alignment so I can distort the TX samples and then update the LUT from the RX (monitored) samples.
I am currently thinking of intercepting the samples between the de-multiplex block and the FIFO block.
Unfortunately because I need to do the correction on oversampled data I won't be able to use some of the features
on the transceiver chip. I am using a Zedboard and an FMCOMMS4 board but I won't need symbol rates above 4 MS/s.
The transmitted waveform is DVB-S2 which is a single carrier QPSK - 32APSK waveform.
Yes I know AD do a transceiver with integrated DPD but that is a bit expensive for this application which is to provide a
high power DVB-S2 signal into the Es'hail 2 Geostationary satellite Amateur Radio Wideband transponder uplink on 2.405 GHz.
- Charles