The PP code for setting the DAC output may not be received until after the current beam passes. Therefore the module receives the PP code for the DAC setting required at the next beam. 10 Ohms is provided in series with both the output and the return lines. Sub-address A8 is reserved for devices that can respond within one beam period, A9 for devices that require two beam periods, and A10 for devices needing three beam periods. Controlled device can change state at next beam.
Controlled device requires two beam periods to stabilize.
Do Nothing PP required. Controlled device requires three beam periods to stabilize. 1000 microseconds of the current beam. A timing chart is included in the drawing package for this module, showing operation from Channel 0 of the PDU with normal beam timing. Therefore, the buffer memory contains the device response to each output channel of the DAC at the last time that channel produced stable output.