  We report the first wideband monitoring observations of PSR J1803-3002A, a
relatively bright millisecond pulsar in the globular cluster NGC 6522 with a
spin period of 7.1 ms and no known binary companion. These observations were
performed using the Parkes 64-m radio telescope with the Ultra-Wideband Low
(UWL) receiver system, which covers 704 to 4032 MHz. We confirm that PSR
J1803-3002A is an isolated millisecond pulsar located near the cluster center
and probe the emission properties of the pulsar over the wide observed band.
The mean pulse profile consists of three components, with the outer components
becoming more prominent at higher frequencies, and a mean spectral index for
the pulsed emission of -1.66+/-0.07 over the observed band. The fractional
linear and circular polarization increase with increasing frequency, which is
unusual for pulsars. We determine a Faraday rotation measure of -107+/-6 rad
m-2 for the pulsar. PSR J1803-3002A is a distant pulsar in the Galactic plane,
but there is no evidence of pulse broadening due to interstellar scattering in
our observations. These results demonstrate the power of ultra-wideband
receiving and signal processing systems.
