No, I used the gpsDO as a reference to fine tune the signal generator oscillator output at 10Hhz. The signal generator now agrees with the gpsDO at 10Mhz, but when I hook signal generator part to the frequency counter, the frequency counter counts about 66 hz high. I hope someone can figure out the PSG9080 circuits well enough to figure out how to calibrate the signal generator to match the frequency counter. I emailed the Juntek website with this problem but have no response so far.