  The readout electronics for the resonant beam position monitors (BPMs) in the
Fermilab Switchyard (SY) have been upgraded, utilizing a low noise amplifier
transition board and Fermilab designed digitizer boards. The stripline BPMs are
estimated to have an average signal output of between -110 dBm and -80 dBm,
with an estimated peak output of -70 dBm. The external resonant circuit is
tuned to the SY machine frequency of 53.10348 MHz. Both the digitizer and
transition boards have variable gain in order to accommodate the large dynamic
range and irregularity of the resonant extraction spill. These BPMs will aid in
auto-tuning of the SY beamline as well as enabling operators to monitor beam
position through the spill.
