The maximum sampling rate when using multiple PowerLabs is dependent on the PowerLab that is the 'master device' and the sampling rates for this device. If this is a 35-series research PowerLab, the maximum sampling rates are as follows:
- 200 kHz using one or two input
- 100 kHz using three or four inputs
- 40 kHz using five to eight inputs
- 20 kHz using nine to sixteen inputs
This however will carry across to the second 16 channels if using a second 16/35 PowerLab. i.e you can sample at 20KHz on all 32 channels, rather than the maximum sampling rate of the one PowerLab being further reduced to 10KHz. Or if you just use 2 channels from each 35-series PowerLab, you can use 200KHz per channel on each channel.
If you are using a 26-series teaching PowerLab the maximum sampling rates are as follows:
- 100 000 samples/s per channel (concurrent);
- 400 000 samples/s (aggregate)
However, if being used as a 'slave device' to a 35-series PowerLab, it can adopt the maximum sampling rate of the master device assuming the minimum no of channels for the master are being used (eg 2 channels from each PowerLab).
More information regarding using multiple devices can be found in this document.