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CTV-2000-FTX
User Manual
18 pgs326.4 Kb0

MultiDyne CTV-2000-FTX User Manual

CTV-2000-FRX
CATV Fiber Optic Receiver
Users’ Manual
(REV 1.0)
CTV-2000 Series Broadcast Transmitter Users’ Manual (REV 1.0)
Table of Contents
5.1 Front Panel Guide .................................................................................................................................. 6
5.2 Rear Panel Guide .................................................................................................................................... 6
5.3 Parameter display ................................................................................................................................... 7
5.4 Alarm Indication ..................................................................................................................................... 8
6.1 Opening the cover .................................................................................................................................. 8
6.2 Apparatuses & Tools .............................................................................................................................. 8
6.3 Installation .............................................................................................................................................. 8
2
CTV-2000 Series Broadcast Transmitter Users’ Manual (REV 1.0)
Preface
This manual is designed for CTV-2000 series 1310 nm broadcast transmitter along with detailed
description of product feature, specification, installation, adjustment and troubleshooting. To install this
transmitter successfully and use it safely, users must read the manual carefully before their installation,
and perform their installation and adjustment according to this manual. Otherwise, some practices or
circumstances can lead to property damage or personal injury. Please contact our service center if any
question:
Important user information:
■ The transmitter installation and adjustment should be conducted by the person after reading this
manual, so as to avoid hazard of equipment damage or personal injury.
■ Caution: it would be very dangerous to point the Fiber Output Port, from which invisible laser emit, directly to human body along with the risk of permanent injury to skin or eyes.
■ Make sure the case and the power supply grounded well before turn on the transmitter (grounding
resistance should be less than 4).
■ To get a stable running circumstance for the transmitter, it would be helpful to equip the UPS AC
power supply and air-conditioner.
3
CTV-2000 Series Broadcast Transmitter Users’ Manual (REV 1.0)
Chapter 1 Overview
CTV-2000 series 1310 nm broadcast transmitters are important equipments to set up CATV HFC
network, and primarily used for TV video signal, digital TV signal, telephone voice signal and data signal
long-distance fiber transmission. The product utilize imported high performance DFB laser transmitter as
light source and RF power digital automatic process technique, along with advanced RF pre-distortion
circuit developed by Our company. At the same time, built-in microprocessor automatically ensures the
excellent performance of this transmitter.
Chapter 2 Features
■ High performance DFB laser with narrow spectrum and good linearity.
■ With RF power digital automatic process technology, CTV-2000 series 1310 nm broadcast
transmitter can control the laser driving RF power level automatically according to voltage of input
RF signal and number of channels, ensuring the best C/N, CTB and CSO.
■ Excellent pre-distortion technology leads to the improved CTB, CSO and C/N.
■ Built-in microprocessor accurately monitor laser output power and temperature.
■ Front panel VFD screen can real-time display the status parameters and function message.
■ 19″1U standard rack with RS485 and RS232 ports for remote monitor and control.
■ Ethernet port option, support Ethernet-basing network monitoring system.
Chapter 3 Internal function block
4
CTV-2000 Series Broadcast Transmitter Users’ Manual (REV 1.0)
Chapter 4 Specifications
Item Unit Parameter
Optical Power mW 4 6 8 10 12 14 16 18 20 22
Optical Link Path Loss dB 7 9 10 11 11.8 12.5 13 13.6 14 14.4
Optical Wave Length nm 1310±20
Type of Laser DFB
Optical modulation
Optical connector Type SC/APC
Frequency Range MHz 47~862
RF Input Level dBmV 15~25
Direct Modulation
Flatness In Band dB
RF Input Impedance 75
Input Reflection Loss dB
C/CTB dB
C/CSO dB
C/N dB
AGC Control Range dB
MGC Control Range dB
Power Voltage V AC 90V~265V (50/60 Hz)
Power Consumption W 24
Operation Temperature ˚C 0~45
Store Temperature ˚C -20~65
Relative Humidity % Max 95% no condensation
Dimension mm 433(L) × 325(W) × 44(H)
±0.75
≥16 (47~862)MHz
≥67
≥62
≥51
±5
±5
Optical Link Path C/N Specifications:
Optical Loss（dB）
CTV-2000-04 CTV-2000-06 CTV-2000-08 CTV-2000-10 CTV-2000-12 CTV-2000-14 CTV-2000-16 CTV-2000-18 CTV-2000-20 CTV-2000-22
Test condition: Test link path consists of CTV-2000, standard fiber and standard optical receiver. When
4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
53.8 52.8 51.8 51.0 50.1 49.2 48.2
53.0 52.0 51.0 50.1 49.1 48.1
52.8 51.9 51.0 50.1 49.1 48.2
52.9 51.9 51.0 50.1 49.1 48.2
52.7 51.8 50.8 49.9
52.4 51.5 50.5 49.5
52.0 51.0 50.1 49.1
52.5 51.6 50.6 49.7
51.9 51.0 50.0 49.0
52.2 51.4 50.4 49.4
49.0
48.0
47.8
48.6
48.1
48.7
47.9
48.0
48.6
47.8
optical receiver input optical power is -1dBm, measure CTB, CSO, C/ N under 59 PAL-D channels.
5
CTV-2000 Series Broadcast Transmitter Users’ Manual (REV 1.0)
Chapter 5 Function Guide
5.1 Front Panel Guide
⑴ ⑵ ⑶ ⑷ ⑸ ⑹ ⑺
Front View
1 CTV-2000 trademark 2 LED status indicator: Green light: normal; Red light: abnormal. User can get message from VFD
monitor to fix the trouble.
3 VFD Monitor: Display each status parameter, product model, delivery series number and other
information of the equipment.
4 UP button: page up the VFD display and increase setting value 5 Down button: page down the VFD display decrease setting value 6 Enter button: MGC mode select and ENTER button.
( Notice: To CTV-2000 transmitter, initial control mode is AGC . If number of channels is less than 15, press UP or DOWN button to shift the VFD display, and press ENTER button when display ‘MOD
LEVEL=XXdBmV’ to select MGC mode. After the selection, VFD display ‘MOD LEVEL=XXdBmV ’ and ‘Please install…’, enter modulating level setting program in which user can
change modulating level by 1 dBmV by pressing UP or DOWN. When modulating level is changed to user’s ideal value, press ENTER to make it effected, at that time VFD display ‘MOD LEVEL=XXdBmV’ and transmitter shift to AGC mode. For instance, if user’s ideal Modulating level is 42dBmV, VFD would display “MOD LEVEL= 42dBmV” after operations shown above)
7 RF input test port: Standard 75Ω style F metric test port for RF signal on-line test. Level tested from
this port is 20dB less than real input level.
5.2 Rear Panel Guide
⑻ ⑼ ⑽ ⑾ ⑿ ⒀ ⒁ ⒂ ⒃ ⒄ ⒅
6
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