Excentis uses state-of-the-art test equipment to evaluate if all samples under test are behaving compliant in several areas, and if they all are calibrated properly. A few popular test cases:
- Upstream Calibration
This test verifies the capability of the Cable Modem under test to accurately report its transmission power and this over the whole power range.
- Downstream Calibration
This test verifies the capability of the Cable Modem under test to accurately report the power it receives on each of its downstream channels.
- Signal to Noise Ratio
For this test the SNR at the modem is controlled and it is verified that the CM is reporting it accurately.
- Return Loss
This test measures the return loss on a CM across its operating frequency range in both upstream and downstream.