Motorola DCT1800 User Manual
DCT1800 Installation Manual
Appendix A
Specifications
Input frequency
54 - 860 MHz (excluding data carrier frequency)
HRC/IRC frequency assignments
Downloadable
Number of channels:
136 carriers per cable
Analog
1 channel per carrier
Digital
More than 1 channel per carrier, content dependent
Input analog video level
0 dBmV – +15 dBmV
Input analog sound level
–17 dBmV – +2 dBmV
Average digital input level
–10 dBmV – +5 dBmV
Data carrier:
QPSK-modulated carrier
Frequency
Agile
Bandwidth
1.5 MHz
Level
–10 dBmV – +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 - 15 dBmV
Isolation (input/output)
70 dB minimum
Differential phase
10 degrees (maximum)
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
Operating environment range:
Temperature
0
°
- 40
°
C (32
°
through 104
°
F)
Humidity
5 - 95% (noncondensing)