RFSoC Development Kit Getting Started Guide
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3.
Type ‘
w
’ at the terminal command line, followed by a carriage return to display all current values.
Note that these are the last values written to the Qorvo registers, not a read back of the device
registers.
4. In preparation for next steps, we shall ensure that no RF output power emerges from the QPA9903
power amplifier (PA) in the TX signal chain of the Qorvo card.
Type ‘
e
’ at the terminal command line followed by a carriage return, then type ‘
1
’ to disable the TX
TQL9092 driver amplifier.
Type ‘
d
’ at the terminal command line followed by a carriage return, then type ‘
0
’ to disable the
QPA9903 power amplifier.
With the digital attenuators at maximum attenuation, the previous steps have ensured that no signal
power is coupled back from the PA through the DPD observation path on channel 1 of the Qorvo
card to the RF-ADC of RFSoC on ZCU111. This is done for the purpose of calibrating the DPD
observation path RF-ADC in next steps.
Figure 9 – Qorvo card TX signal chain disabled
