In-situ testing of frequency labeling and aliasing of DP and measurement of signal cross-coupling at LWA1

For conducting VLBI experiments with LWA1 over baselines of thousands of kilometers, especially attempting to correlate with LOFAR stations, we require accurate frequency tagging at the highest precision possible with a GPS referenced clock. Also, some data conversion is required in order to match the LOFAR channelization with that of LWA1. The dataset collected here will aid in verification whether the conversion works as intended and provides a test dataset for future data analysis scripts to verify proper frequency tagging. In addition, possible aliasing artifacts in Jovian burst data from LWA1 was reported by Tracy Clarke. This document describes the work done in order to assess both the frequency accuracy and aliasing effects of the digital processor for beam-forming data at LWA1. A side-benefit of this work provides in-situ measurements of cross-talk between adjacent channels sharing the same RJ45 connector and Cat-7 cable connecting the output of the analog receiver with the digital processor input.