Motorola DCT2000 インストール手順
DCT 2000 Installation Manual
Appendix A
Specif ications
Input frequency
54 through 860 MHz (excluding data carrier frequency)
HRC/IRC frequency assignments
Downloadable
Number of channels
136 carriers per cable, 1 or 2 cables
Analog
1 channel per carrier
Digital
More than 1 channel per carrier, content dependent
Dual A/B cable switching
Optional A/B (field upgradeable)
Input analog video level
0 dBmV through +15 dBmV
Input analog sound level
–17 dBmV through +2 dBmV
Average digital input level
–10 dBmV through +5 dBmV
Data carrier
QPSK-modulated carrier
Frequency
75.250 MHz or 72.75 MHz or 104.2 MHz
Bandwidth
1.5 MHz
Level
–10 dBmV through +5 dBmV
Video s/n
49 dB @ 0 dBmV input level
Output frequency accuracy
±
150 kHz
Return loss
Input
6 dB minimum
Output
8 dB minimum
Spurious output
–57 dBc maximum, in band
Cross-modulation distortion
–56 dB (136 channels, each @ +15 dBmV)
Composite second order distortion
–57 dB (136 channels, each @ +15 dBmV)
Second order distortion
–60 dB (136 channels, each @ +15 dBmV)
Composite triple beat distortion
–57 dB (136 channels, each @ +15 dBmV)
Set-top input beats (with all input signals)
–25 dB (136 channels, each @ +15 dBmV)
Hum modulation distortion
3 IRE
Output level
10 through 15 dBmV
Isolation (input/output)
70 dB minimum
Differential phase
10 degrees (maximum)
Analog descrambling method (optional)
Gated sync suppression or dynamic gated sync suppression, video inversion, audio
privacy, and Hamlin compatibility
privacy, and Hamlin compatibility
On-screen display (OSD)
Screen size
352 x 480 pixels (configuration dependent)
Message/barker capacity
Up to 40 pages (configuration dependent)
Mechanical security
Standard: security screws, unichassis construction