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Transport aspects 2

PSD
(dBm/Hz)
PSD tr3

175 kHz

−80

−100

500 f tr3 Frequency
(kHz)
G.9700(14)_F6-1

Figure 6-1 – Low-frequency edge stop-band mask
Wideband transmit PSD mask (TXPSDM_W)

This mask is defined to verify a mathematically calculated wideband average PSD over a 1 MHz
window (PSD_W(f)) as defined in clause 6.5.
The TXPSDM_W(f) is defined in Table 6-2 for the frequency in question.

The wideband average transmit PSD (PSD_W(f)) is required to satisfy the wideband transmit PSD
mask TxPSDM_W for frequencies (2.0 MHz + ½×MBW + 0.5MHz)
< f < (ftr3 − 175kHz − ½×MBW − 0.5MHz). The mask value to be compared against shall be the
maximum value the mask takes within the 1 MHz window [f – 0.5 MHz, f + 0.5 MHz].

Table 6-2 – LESM TXPSDM_W requirements

LESM
Frequency TXPSDM_W
(MHz)
(dBm/Hz)
2.0 to 4.0 −100
4.0 to 5.0 −110
> 5.0 −112

7 Specification of spectral content

7.1 Profile control parameters
Each profile specifies normative values for the following parameters:
− the number of subcarriers (N);
− the subcarrier spacing (fSC);
− the cyclic extension parameters LCP and β; and

− the maximum aggregate transmit power (applies to both downstream and upstream directions).
Table 7-1 shows the valid control parameters for each profile. The parameters are defined in
[ITU-T G.9701].

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