Bias Voltage on RF Ports

Need a little help here…

I have tested two Kraken SDRs now and only seeing the Bias Voltage on Channels 2 and 3 after power up. Channels 0, 1, and 4 are reading 0 voltage. Is this a known issue or is there a trick/enable feature that I am missing?

I am planning to use the bias voltage for some active antennas to test soon and want to confirm the Bias Voltage works on all channels before purchasing the antennas I plan to use.


Did you enable the vias tee in the DAQ settings? In the UI enable Basic DAQ Config, then Custom DAQ Config, and change the bias tee control from 0,0,0,0,0 to 1,1,1,1,1, then click on reconfigure and restart daq chain.

If bias tee control is set to all zero and there is voltage, then you’re probably just seeing the residual output capacitor voltage.

@random_task_0988 What is the current rating for your power supply?

That worked, thank you guys. Just had to change that and power cycle.