Maintenance and Troubleshooting The Terra graph radio does not report power 1. Using a digital multi meter verify that the DC voltage and polarity at the Terra graph power terminal block Is correct oF Using a or POE tester verily that the comet ping are providing the correct DC voltage. 2. Verily that the ground is connected and secured properly. 3. it the DC voltage, polarity, and ground are correct, verify that the radio hag power as follows: a.