Page
65
NewS
tream
User Guide and Technical Manual
Satelitte Status Page
[Continued]
Modulation Status
The Modulation Status
fi
elds present
NewS
tream
’s microwave settings for the selected
preset.
Modulation Mode
This
fi
eld displays one of the following modulation classes for each microwave preset:
• COFDM-DVB-T
— Coded Orthogonal Frequency - Division Multiplexing - Digital
Video Broadcasting — Terrestrial
• LMS-T
— Link Modulation Scheme —Terrestrial
• DVB - S
—
Digital Video Broadcasting — Satellite Mode
• DVB - S2
—
Digital Video Broadcasting —Satellite Mode
Modulation
This
fi
eld displays the following modulation classes for each microwave preset in the
Microwave Settings page. Moving up the scale of modulations allows higher throughput
but at the cost of robustness:
• QPSK
— Quadrature phase-shift keying
• 16-QAM
— Quadrature amplitude modulation
• APSK
— Amplitude Phase-shift Keying [for both 16 and 32-APSK]
• 64 - QAM
— Quadrature amplitude modulation
FEC
Forward Error Correction [FEC] or channel coding is a technique used for controlling
errors in data transmission over unreliable or noisy communication channels. This
fi
eld
displays the FEC for the existing microwave preset. Lower fractions are more robust
to noise and fading but at the cost of reduced information bandwidth. Common FEC
values include:
• 1/4
• 1/2
• 1/3
• 2/3
• 3/4
• 5/6
• 7/8
Spectrum
The Spectrum
fi
eld displays either Normal or Inverted.
Содержание NewStream
Страница 49: ...Page 49 NewStream User Guide and Technical Manual Figure 29 NewStream Status Page ENG Remote Control Mode ...
Страница 72: ...Page 72 NewStream User Guide and Technical Manual Figure 35 Modify Presets Encoder Settings Page ...
Страница 82: ...Page 82 NewStream User Guide and Technical Manual Figure 37 Modify Presets Cellular Settings Page ...
Страница 96: ...Page 96 NewStream User Guide and Technical Manual Figure 43 NewStream License Manager Web Page ...
Страница 119: ...Page 119 NewStream User Guide and Technical Manual Notes ...