Cisco Cisco D9887B HDTV Modular Receiver Guia Da Instalação
8VSB/QAM Receiver Option
4043118 Rev A
269
8VSB/QAM Receiver Option
RF Input -
Frequency Range:
50-850 MHz
VHF/UHF (Ch2 – Ch69)
CATV (Ch2 – Ch134)
CATV Offsets:
FCC, IRC, HRC
Sensitivity:
–15 dBmV
Dynamic Range:
> 35 dB
Modulation:
8VSB, QAM-B
Connector:
F-81 Type, panel mount, female
Impedance:
75 ohms
MER:
Accuracy: +/- 1 dB
Range: 0 – 35 dB – 38 dB (QAM 256)
Low limit flag: User defined
Input Level Flag:
Range: –15 dBmV to +20 dBmV
Accuracy: +/-5 dB
Low flag limit: User defined
QAM -
Standard:
ITU-T, Annex B (SCTE DVS-031)
QAM Mode:
64 and 256
De-interleaver:
I=1-128, J=128/1
Nyquist Roll Off (Alpha): 12%, 18%
8VSB -
Standard:
ATSC A/53E
Decoding Levels:
8
Nyquist Roll Off (Alpha): 11.5%