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US 11,239,924 B2Granted
Per-channel modulation error ratio (MER) calibration and determination on a multi channel receiver
AssigneeViavi Solutions Inc.
InventorsLoren R. Eggert, Daniel K. Chappell
Life of this patent
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Abstract
A method, apparatus and system for per-channel MER calibration and determination on a multi-channel receiver.
Claims18
A computer-implemented method, said method being performed on a test instrument adapted to monitor one or more channels in a multi-channel network, said method comprising:
- determining a noise floor of the test instrument;
- for each channel of the one or more channels being monitored by the test instrument:
- measuring an input signal received over the channel;
- determining a theoretical modulation error ratio (MER) ceiling based on the input signal and the noise floor of the test instrument;
- measuring an MER for the channel;
- and
- computing a calibrated MER based on a comparison of the measured MER to the theoretical MER ceiling.
4 more elements
A test instrument for monitoring one or more channels in a multi-channel network, said test instrument comprising:
- a storage device;
- and
- a processor executing program instructions stored in the storage device and being configured to:
- determine a noise floor of the test instrument,
- for each channel of the one or more channels being monitored by the test instrument:
- measure an input signal received over the channel;
- determine a theoretical modulation error ratio (MER) ceiling based on the input signal and the noise floor of the test instrument;
- measure an MER for the channel;
- and
- compute a calibrated MER based on a comparison of the measured MER to the theoretical MER ceiling.
7 more elements
A test instrument for monitoring one or more channels in a multi-channel network, said test instrument comprising:
- a storage device;
- and
- a processor executing program instructions stored in the storage device and being configured to:
- perform an automatic gain control process to select a gain for signals input by the test instrument;
- determine a noise floor of the test instrument,
- for each channel of the one or more channels being monitored by the test instrument:
- measure an input signal received over the channel;
- determine a theoretical modulation error ratio (MER) ceiling by subtracting the noise floor of the test instrument from the input signal;
- measure an MER for the channel;
- and
- compute a calibrated MER based on a comparison of the measured MER to the theoretical MER ceiling.
8 more elements
Dependencies are inferred from the claim text.