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Upstream

Results

Attainable Bit Rate (bps)

Maximum Attainable Data Rate in bits per second. The maximum net data rate currently attainable by ATU-R transmitter and ATU-C  receiver (upstream direction).

Actual Transmit Power (dBm)

Actual Aggregate Transmit Power from the ATU-C at the instant of measurement.

Range

-31 to 31 dBm

Loop Attenuation (dB)

The measured difference in the total power transmitted by the ATU-R and the total power received by the ATU-C over all sub-carriers during diagnostics mode.

Range

0 to 127 dB

Signal Attenuation (dB)

The measured difference in the total power transmitted by the ATU-R and the total power received by the ATU-C over all sub carriers during SHOWTIME after the diagnostics mode.

Range

0 to 127 dB

SNR Margin (dB)

The maximum increase in dB of the noise power received at the ATU-C, such that bit error rate (BER) requirements are met for all bearer channels received at the ATU.

Range

-64 to 63 dB

 

Downstream

Results

Attainable Bit Rate (bps)

Maximum Attainable Data Rate in bits per second. The maximum net data rate currently attainable by ATU-C transmitter and ATU-R receiver (downstream direction).

Actual Transmit Power (dBm)

Actual Aggregate Transmit Power from the ATU-R at the instant of measurement.

Range

-31 to 31 dBm

Loop Attenuation (dB)

The measured difference in the total power transmitted by the ATU-C and the total power received by the ATU-R over all sub-carriers during diagnostics mode.

Range

0 to 127 dB

Signal Attenuation (dB)

The measured difference in the total power transmitted by the ATU-C and the total power received by the ATU-R over all sub-carriers during SHOWTIME after the diagnostics mode.

Range

0 to 127 dB

SNR Margin (dB)

The maximum increase in dB of the noise power received at the ATU-R, such that bit error rate (BER) requirements are met for all bearer channels received at the ATU.

Range

-64 to 63 dB

 

January 22, 2011