  EBEX is a balloon-borne telescope designed to measure the polarization of the
cosmic microwave background radiation. During its eleven day science flight in
the Austral Summer of 2012, it operated 955 spider-web transition edge sensor
(TES) bolometers separated into bands at 150, 250 and 410 GHz. This is the
first time that an array of TES bolometers has been used on a balloon platform
to conduct science observations. Polarization sensitivity was provided by a
wire grid and continuously rotating half-wave plate. The balloon implementation
of the bolometer array and readout electronics presented unique development
requirements. Here we present an outline of the readout system, the remote
tuning of the bolometers and Superconducting QUantum Interference Device
(SQUID) amplifiers, and preliminary current noise of the bolometer array and
readout system.
