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)

DCT1800 Installation Manual

Page 26
Image 26
Motorola DCT1800 installation manual Specifications