There seems to be confusion between program and waveform sync. Michael is asking about program sync. A topic covered in page 98 of the User's Guide.
“Output Shadowing pane: this multi-purpose pane allows you to slave Out 2 to Out 1, create any carrier, specify a voltage for each Out, swap waveform, frequencies, and amplitudes between outputs – and slave to another generator.
You can then use this second unit as the slave for a third, and so on. You can even use the virtual PC generator as the overall master for multiple slaves.”
I recommend all users read this guide, as it contains very useful information.
For more details, please check the link: