Running PowerSDR 2.7.2, JT65HF, Flexradio 1500, and Windows 7 Professional, 64 bit. Have system clock synchronized thru Network Time Synchorization which updates every 15 minutes. Time sync on the PC appears to be very accurate. When running this configuration, "DT values" on the JT65 screen continue to get longer over time (1.5 - 6 seconds over 24 hours). The current solution is to "Stop" PowerSDR 2.7.2, and then "Start" it again. I don't have to reboot or anything, just hit the "Stop" button and then "Start." It seems to reset the clock and all is well for a while. Is there a solution for this problem?