Why UWB ModAcc Traces for Q Phase Pulse & Baseband Impulse Response Is Un-Correct

Updated Mar 19, 2024

Reported In

Software

  • Ultra-Wideband Test Toolkit 22.5

Issue Details

When you use the 5840 and LabVIEW example of Ultra Wideband Test Toolkit to do loopback testing , You found out the amplitude of  UWB ModAcc Traces for Q Phase Pulse & Baseband Impulse Response is too small ; But the ModAcc is >98%, the I Phase Pulse & Baseband Impulse Response is normal ,  Is it expected?

UWB loopback testing result.jpg
You can see the amplitude of I curve was about 0.01 level , but the amplitude of Q curve was about 0.0001 level ;

Solution

When you use Ultra Wideband Test Toolkit doing loopback testing , the generator only generate the I data, there is no Q data ; So you can miss the result of Q Phase Pulse & Baseband Impulse Response;