Set the power measurement interval of the noise-cal system.

Arguments:

Interval dt

The interval between noise-power measurments, or zero to disable the periodic readout facility.

Example 1:

The following example sets the interval between noise-power measurements to 1 minute.

 noise_readout_interval 1m

Example 2:

The following example stops periodic readouts from being taken, leaving it up to the user to explicitly request individual readouts with power_meter zero commands.

 noise_readout_interval 0s

Context:

Primary calibration of the CBI receivers is achieved by periodically observing calibration sources. Between primary calibrations, changes in receiver gains are deduced by injecting the output of a noise source into the receivers. Since this noise source can itself vary, a power meter is used to monitor its output. By default the power meter is read once per minute.