Why does the PGXL Keep Going to Standby?

Thanks for the reply. Tuning up slightly was wherever the next station calling CQ was located. Sometimes a small amount (~4 kHz) and sometimes more. Some of the contacts were through the Palstar Auto-HF but others were through the SteppIR. The problem appeared to be on both antennas. I did put the PGXL in Standby when I tuned the Palstar. I'm going to work the ARRL Sweepstakes in two weeks and I'll pay particular attention to the SWR readings to see if it's what you suggest relating to 3:1 exceedances, which I've gotten pretty good at avoiding them now but maybe that was happening when I first started using the PGXL. I've tweaked the SteppIR to be a better match on all of the bands and I plan to reposition the 80 meter wire to get a flatter SWR across the band. Mike mentioned SWRPlotter6K in his latest video and it looks pretty good so I'll run it after I get everything repositioned. I've also added a lightning arrestor connected to ground at the base of the tower to ground the coax shield in case some RF was getting by my lightning arrestor in the arrestor box just outside the wall where the shack is. I'll give you an update after the contest. Thanks again. Jim