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Clock Rate In Dual Channel AWG'sWaveforms selected in channel 2 of the LW400 are generated using the same sample clock as channel 1. For this reason, if the waveform was created at a different clock rate then a warning message, "Please resample channel 2" will appear. Press the button labeled CHAN 2 to display the CH 2 menu, shown in the accompa- nying figure. Press the Resample softkey, the waveform in channel 2 is resampled using the currently set clock rate.
It is possible to use the marker to clock an external device or event. By pushing the field Type in the above menu, clock may be selected. In this case a new field labeled Frequency appears. The desired clock frequency may be input subject to certain constraints. The two fundamental constraints on the marker when used as a clock arise from the fact that the marker is associated with a waveform file and can only have frequencies that are even multiples of the current clock frequency. For example, a single marker pulse cannot be longer than the associated waveform file. Also the marker cannot have frequencies that are not even multi- ples of the clock frequency. For example, if the clock is running at 400 MS/sec, which is 2.5 nsec period then the marker can have a period of 5 nsec, 10 nsec, 15 nsec, 20 nsec, etc. It however, cannot have a period of 12.5 nsec or 17.5 nsec.
From page 13-5 of the manual:From page 14-4 of the manual: