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
Содержание AMM-806
Страница 86: ...79 TVCB PC Installation ...
Страница 93: ...86 SMI Installation Torque Patterns 1 Start Here 2 3 4 5 6 1 Start Here 2 3 4 4 PORT 8 PORT ...
Страница 125: ...118 Fiber Optics Fiber Loss vs Path Length Single Mode 1550 nm ...
Страница 156: ...149 Cable TV Channel Format NTSC NTSC Composite Video Waveform ...
Страница 157: ...150 US Frequency Spectrum ...
Страница 158: ...151 FCC Aeronautical Band Frequencies Used for Communication and Navigation ...
Страница 171: ...164 F C x 32 Temperature Conversion Nomograph C F FAHRENHEIT F CELSIUS C 9 5 C F 32 5 9 KELVIN K K C 273 ...
Страница 175: ...168 Common CATV Symbols ...
Страница 176: ...169 Common CATV Symbols ...
Страница 177: ...170 Digital L Band Distribution Symbols ...
Страница 178: ...171 Digital L Band Distribution Symbols ...
Страница 183: ...176 Typical Cable Attenuation Chart in dB 100 Feet 68 F 20 C ...
Страница 187: ...180 Echo Rating Graph ...
Страница 188: ...181 Signal to Interference Limits Non Coherent Carriers ...
Страница 190: ...183 Heterodyne Modulator Analog ...
Страница 191: ...184 Heterodyne Processor Analog ...
Страница 213: ...206 Multiplexers ...
Страница 215: ...208 Antenna Stacking Methods to Increase Received Signal Level NOTE Refer to Antenna Spacing Chart for dimensions ...
Страница 216: ...209 Antenna Spacing Mounting Channelized Antennas on the Same Mast NOTE Refer to Antenna Spacing Chart for dimensions ...
Страница 285: ...Rev 8 0 ...