Wavetek 147 Especificações descarregar pdf (Página 75)

100

101

Channel Plans: Setting Channel Plan Parameters

selecting the unit’s default setting for Inverted Spectrum, which is simply

“Yes” or “No”.

• For example, when you select the NCTA channel plan, the SDA defaults

to Annex B and defaults to “No” regarding Inverted Spectrum because

the occurrence of spectrum inversion is not anticipated. If spectrum

inversion does occur, however, the setting can be edited to “Yes” on the

Edit Channel screen.

• The PAL-UK channel plan defaults to Annex A and to “Yes” for Inverted

Spectrum because spectrum inversion is anticipated with PAL-UK

channels. All other Base Channel Plans default to “No” for Inverted

Spectrum (because spectrum inversion is not anticipated).

Fig. 3-10 EDIT CHANNEL Menu Screen (Type: QAM)

Configuring a QAM Digital Stream Channel

1. From the EDIT CHANNEL PLAN screen, select the channel to be

configured as a QAM Digital Stream channel and press the Enter key

on the keypad.

2. Press the down diamond key to highlight Type from the EDIT

CHANNEL menu and press Enter to edit the current selection. Use

the down diamond key to select QAM Digital Stream and press Enter

(see Figure 3-10).

3. Press the down diamond key to highlight Modulation and press Enter

to edit the current selection. Use the down diamond key to select 64 or

256 QAM and press Enter.

1 2 ... 70 71 72 73 74 75 76 77 78 79 80 ... 409 410

Comentários a estes Manuais

Sem comentários

Wavetek 147 Especificações Página 75

Comentários a estes Manuais

Manuais e produtos relacionados com Medição, teste e controlo Wavetek 147