11
AQD - ATSC/QAM Demodulator
Left/Right Sequence Details
• SNR is displayed when an AQD module locks to an input
program channel and indicates the signal to noise ratio of
the input signal and is expressed in dB. The following are
the desired input SNR ranges for the appropriate signal
modulation type:
• NO PROGRAM will be displayed if a valid lock is acquired
but no program signal is actually being detected
• NO SIGNAL indicates that the input signal was not
detected (no RF input)
• PLEASE SCAN indicates a scan was not performed or is
required again
• AUDIO ONLY indicates no video signal
• NO AUDIO indicates no audio signal present
• SCRAMBLED PRG indicates the signal has encryption
NOTE:
The AQD Not Present message will be displayed when
the optional Remote Configuration Server (RCS) Module is
installed in a particular chassis slot.
Excellent =
>30 dB
>38 dB
>38 dB
Good =
25—30 dB
30—38 dB
35—38 dB
Marginal =
18—25 dB
23—30 dB
30—35 dB
Non-Functional =
<18 dB
<23 dB
<30 dB
8VSB
64 QAM
256 QAM
Summary of Contents for AMM-806
Page 86: ...79 TVCB PC Installation ...
Page 93: ...86 SMI Installation Torque Patterns 1 Start Here 2 3 4 5 6 1 Start Here 2 3 4 4 PORT 8 PORT ...
Page 125: ...118 Fiber Optics Fiber Loss vs Path Length Single Mode 1550 nm ...
Page 156: ...149 Cable TV Channel Format NTSC NTSC Composite Video Waveform ...
Page 157: ...150 US Frequency Spectrum ...
Page 158: ...151 FCC Aeronautical Band Frequencies Used for Communication and Navigation ...
Page 175: ...168 Common CATV Symbols ...
Page 176: ...169 Common CATV Symbols ...
Page 177: ...170 Digital L Band Distribution Symbols ...
Page 178: ...171 Digital L Band Distribution Symbols ...
Page 183: ...176 Typical Cable Attenuation Chart in dB 100 Feet 68 F 20 C ...
Page 187: ...180 Echo Rating Graph ...
Page 188: ...181 Signal to Interference Limits Non Coherent Carriers ...
Page 190: ...183 Heterodyne Modulator Analog ...
Page 191: ...184 Heterodyne Processor Analog ...
Page 213: ...206 Multiplexers ...
Page 285: ...Rev 8 0 ...