Appendix A

S p e c i f i c a t i o n s

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

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

DCT 2000 Installation Manual

Page 41
Image 41
Motorola DCT 2000 Specification s, Appendix a, 25 dB 136 channels, each @ +15 dBmV, Hum modulation distortion