Anomalous signal on an analog output of an RX device when the channel is not in use

Tech Note: TN0198
Product: RX5, RX6, RX7, RX8
Version: All
Date Added: 2005-10-06

Issue

The DAC outputs of the RXn processors will continue to generate a signal under the following conditions:

  • Input to the DAC channel is greater than zero immediately before switching the DacOut channel parameter.

  • Input to the DAC channel is greater than zero immediately before halting the processing chain.

  • Input to the DAC channel is greater than zero immediately before loading a new processing chain.

Workaround

Make sure that the inputs to all DAC channels are zero before doing any of the above. This can be done by gating the signal or setting the DAC output to zero before switching channels, halting the processing chain, or loading a new chain.

Note

The anomalous signal can be terminated by cycling power on the zBus rack holding the RXn processor.