  Scaling of quantum computers to fault-tolerant levels relies critically on
the integration of energy-efficient, stable, and reproducible qubit control and
readout electronics. In comparison to traditional semiconductor control
electronics (TSCE) located at room temperature, the signals generated by
Josephson junction (JJ) based rf sources benefit from small device sizes, low
power dissipation, intrinsic calibration, superior reproducibility, and
insensitivity to ambient fluctuations. Previous experiments to co-locate qubits
and JJ-based control electronics resulted in quasiparticle poisoning of the
qubit; degrading the qubit's coherence and lifetime. In this paper, we
digitally control a 0.01~K transmon qubit with pulses from a Josephson pulse
generator (JPG) located at the 3~K stage of a dilution refrigerator. We
directly compare the qubit lifetime $T_1$, coherence time $T_2^*$, and thermal
occupation $P_{th}$ when the qubit is controlled by the JPG circuit versus the
TSCE setup. We find agreement to within the daily fluctuations on $\pm
0.5~\mu$s and $\pm 2~\mu$s for $T_1$ and $T_2^*$, respectively, and agreement
to within the 1\% error for $P_{th}$. Additionally, we perform randomized
benchmarking to measure an average JPG gate error of $2.1 \times 10^{-2}$. In
combination with a small device size ($<25$~mm$^2$) and low on-chip power
dissipation ($\ll 100~\mu$W), these results are an important step towards
demonstrating the viability of using JJ-based control electronics located at
temperature stages higher than the mixing chamber stage in highly-scaled
superconducting quantum information systems.
