The ``Puertorican Ultimate Pulsar Processing Instrument'' (PUPPI) is a backend built with off-the-shelf hardware designs, and custom FPGA ``Gateware". This gateware is compiled and loaded into the 7 Xilinx FPGA's used for PUPPI's implementation. It is a clone of the Green Bank Observatory GUPPI instrument.
PUPPI is fully integrated into the Arecibo observing software,
and non-expert users are encouraged to include its usage in their
telescope proposals. In search mode, the PUPPI backend provides
a maximum bandwidth of 800 MHz, up to 2048 spectral channels,
and 40.96 sec minimum sampling time. In addition, 20.48
sec sampling is possible in on-line folding mode. For more
details, potential users can refer to the GUPPI on-line manual at