Hi Analog Dedicated Team,
I did some comparison signals between TX-RX 1 and TX-RX 2 on fmcomms2 using GNURadio. This experiment was taken in May 2018 as shown in Fig1 below.
And the result as shown in Fig2 below:
Clearly this variation seem acceptable. Then lately i found some error on my user application. Then I run again this experiment and the result shown high significant different on TX-RX 2 as shown in Fig 3 below( taken by today).
on TX-RX 1 look normal but huge variation on TX-RX 2.
Then I did some sweep on frequency to observe their magnitude consistency as shown in Fig 4 below.
1- Anyone have idea why this symptom happen only on one transceiver (TX-RX 2 only) ? but others receiver TX-RX 1 seems OK?
2-How I can calibrate those TX-RX 2 path ?