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Scientific Atlanta |
Headend Systems
CETUS™ MK II PAL D/K (B/G)
Frequency Agile Television Modulator
Description
The CETUS™ MK II Frequency Agile Television Modulator is a
high-quality, microprocessor controlled modulator used in large-
sized broadband networks. It is used to convert audio and video
signals into RF output signals. High performance plus agility
makes it suitable for systems requiring backup modulators.
Features
• All agile channels from 47 MHz to 870 MHz
• Front panel LCD and buttons for user-friendly control
• Independent oscillation in IF 38 (38.9) MHz - SAW for IF and high SNR
• Low differential gain and differential phase
• PLL frequency composite in video carrier frequency and audio carrier frequency
• Unique diode dual balance design with good linearity and low noise
• Video AGC function with modulation depth of 87.5%
• IF video and audio interfaces for scrambling; clamping switch for video scrambling
• Automatic RF amplitude stabilizer
• Local or remote status monitoring and control via RS-485
• Support ROSA™ / TNCS element management
• 19-inch (1 RU) chassis with independent power supply
www.DataSheet4U.net
CETUS MK II PAL D/K(B/G)
Frenquency Agile Television Modulator
Specifications
RF
Television System
Frequency Range
Channel
IF Frequency
Video/Audio Carrier Interspace
Output Return Loss
Video Carrier Output Level
Output Level Adjustment Range
Video/Audio Carrier
Frequency Accuracy
Video Carrier Deviation
CNR
Spurious Out-band
Test Point
Connector Type
Video
Video Input Amplitude
Video Input Impedance
Video Modulation Depth
In-band Flatness
Differential Gain
Differential Phase
K Figure
Chrominance-Luminance Delay
SNR
Connector Type
Audio
Audio Input Amplitude
Audio Input Impedance
Pre-emphasis
Audio Deviation
Frequency Response
Distortion
SNR
Connector Type
Element Management
Communication Interface
Communication Format
Communication Rate
EM Supported
Others
Powering
Power Consumption
Operating Temperature
Relative Humidity
Dimensions
Weight
Units
-
MHz
-
MHz
MHz
dB
dBµV
dB
dB
kHz
kHz
dB
dB
dB
-
-
Ω
%
dB
%
°
%
ns
dB
-
V
kΩ
µs
kHz
dB
%
dB
-
-
-
bits/s
-
V
W
°C
%
mm
kg
Specifications
PAL B/G
PAL D/K
47 to 870 (any channel)
E02-E69
DS1-DS57
38.9 38
5.5 MHz ±0.5 kHz
6.5 MHz ±0.5 kHz
≥10
≥120 (typical)
0 to 16 (in 0.5 dB step)
8 to 22 (in 0.5 dB step)
≤±5
≤±20
≥60
≤-60
-30±1.5
F connector
1Vp-p (Full TV signal, positive pole)
75
87.50
≤2 (within 5 MHz)
≤2 (typical)
≤2 (typical)
≤2 (typical)
≤30 (typical)
≥58 (weighted)
BNC
0.775
10 (not balanced)
50
±50
±0.5 dB (40 Hz to 15 kHz)
≤1 ( when deviation at ±60 kHz)
≥60
BNC
RJ-45, DB-9
RS-485, RS-232
9600
ROSA/TNCS
220 V AC±10% 50 Hz
25
+5 to +40
20 to 80
482 x 433 x 44
6.2
2
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