Upstream
SNR Test Results
Tone |
Tone index. In the range of 0 to 511. 0 indicates 4.3125 kHz Tone Freq, 1 indicates 8.625 kHz, ..., 511 indicates 2208.0000 kHz. |
Frequency (kHz) |
Tone frequency. Tone Freq = (Tone Index +1) x 4.3125 kHz.. |
Attenuation (dB) |
An listing of up to 512 real H(f) logarithmic representation values in dB for the respective transmission direction. It supports up to 512 (downstream) sub-carriers. The number of utilized values for a direction (downstream or upstream) depends on the number of sub-carriers defined for that direction (NSCds or NSCus). Each row in the table contains a pair of Hlog(f = i*Df) values for a particular sub-carrier index. The real Hlog(f) value has a range of -96.3 to 6.0 dB. "no data" indicates that no measurement could be done for the sub- carrier because it is out of the passband or that the attenuation is out of range to be represented. |
Noise (dBm/Hz) |
An listing of up to 512 real Quiet Line Noise values in dBm/Hz for the respective transmission direction. Like Attenuation, it supports up to 512 (downstream) sub-carriers. Each row in the table contains a pair of QLN(f= i*Df) value values for a particular sub-carrier index. The QLN(f) value has a range of -150.0 to -23.0 dBm/Hz. "no data" indicates that no measurement could be done for the sub-carrier because it is out of the passband or that the noise PSD is out of range to be represented. |
SNR (dB) |
This is the SNR Margin per sub-carrier, expressing the ratio between the received signal power and received noise power per subscriber. It is a listing of 512 values. Like Attenuation, it supports up to 512 (downstream) sub-carriers. The SNR value has a range of -32 to 95 dB. "no data" indicates that no measurement could be done for the sub- carrier, probably because it is out of the PSD mask passband or that the noise PSD is out of range to be represented. |
Downstream
SNR Test Results
Tone |
Tone index. In the range of 0 to 511. 0 indicates 4.3125 kHz Tone Freq, 1 indicates 8.625 kHz, ..., 511 indicates 2208.0000 kHz. |
Frequency (kHz) |
Tone frequency. Tone Freq = (Tone Index +1) x 4.3125 kHz.. |
Attenuation (dB) |
An listing of up to 512 real H(f) logarithmic representation values in dB for the respective transmission direction. It supports up to 512 (downstream) sub-carriers. The number of utilized values for a direction (downstream or upstream) depends on the number of sub-carriers defined for that direction (NSCds or NSCus). Each row in the table contains a pair of Hlog(f = i*Df) values for a particular sub-carrier index. The real Hlog(f) value has a range of -96.3 to 6.0 dB. "no data" indicates that no measurement could be done for the sub- carrier because it is out of the passband or that the attenuation is out of range to be represented. |
Noise (dBm/Hz) |
An listing of up to 512 real Quiet Line Noise values in dBm/Hz for the respective transmission direction. Like Attenuation, it supports up to 512 (downstream) sub-carriers. Each row in the table contains a pair of QLN(f= i*Df) value values for a particular sub-carrier index. The QLN(f) value has a range of -150.0 to -23.0 dBm/Hz. "no data" indicates that no measurement could be done for the sub-carrier because it is out of the passband or that the noise PSD is out of range to be represented. |
SNR (dB) |
This is the SNR Margin per sub-carrier, expressing the ratio between the received signal power and received noise power per subscriber. It is a listing of 512 values. Like Attenuation, it supports up to 512 (downstream) sub-carriers. The SNR value has a range of -32 to 95 dB. "no data" indicates that no measurement could be done for the sub- carrier, probably because it is out of the PSD mask passband or that the noise PSD is out of range to be represented. |
May 11, 2011