A quick update - today I run two tests, using different temperature cycle profiles.
Test 1)
Profile start 70°C -> 10°C -> 70°C:
AD9361 calibrated at 70°C ambient, running LTE20 profile 2Rx2Tx: CW 10MHz TX Attenuation -10dB.
Loopback Frequency spectrum observed with MAX HOLD, and BBPLL Lock in 0x5E:8. No unlock over entire range observed.
Test 2)
70°C -> 10°C -> 70°C -> 0°C -> 70°C:
During temperature maxima re-calibrate AD9361 (@ 70,0,10): No unlocks or other issues observed.
Other conditions like 1).
May I ask about more details - what is the exact temperature profile I should use?
Please provide temperature calibration points and exact device configurations for each calibration point.
-Michael