Aluminum CATV Fiber Optic Transmitter 1550nm Optical Transmitter
For Digital Analog TV
Performance Features
■ Support RF mixed and optical mixed two modes.
■ Adopt customized imported excellent linearity,low noise,optical
isolation,distributed feedback 1550nm DBF laser,ITU-T standard
wavelength.
■ Predistortion circuit for 1550nm CSO index improvement.
■ When the SBS of Insert path is more than 16dBm,within certain
transmission distance,the 1550nm direct optical transmitter could
work as external optical transmitter.
■ With micro processor to control the laser APC,ATC and on-line
monitor to make sure the best working performance of laser,control
the optical power precisely greatly improve the system performance
and prolong the service life.
■ The RF drive amplifier and control circuit adopt arsenide
amplifier and go through power multiplier module as RF drive level
of the laser make sure the CTN ratio and non linearity distortion
index of the device.
■ Automatic gain control (AGC) and manual gain control (MGC) can be
set by pressing the button. RF input level indicator and alarm
indication are displayed automatically in the LCD panel.
■ The insert path power is adjustable.
■ Front LCD display the key working parameters.
■ With the interface of RS232,RJ45,built-in class II network
management responder, network management communication protocol
follows GB / T20030-2005 "HFC network equipment management system
specifications" and compatible with ANSI / SCTE, IEC standards. The
MIB library can also be opened to the operators who apply the
device for network management integration.
■ The working status of the equipment could be monitored and
controlled by EMS,like broadcasting path optical power,insert path
optical power,laser wavelength,laser temperature,power status and
bias current,RF gain etc.
■ Built in micro processor firmware,with laser status display,data
display,error alarm,network management etc.When the operating
parameters of the laser deviate from the safety range, the device
automatically cuts off the laser power supply, and at the same
time, the sound and light alarm (the front panel alarm red light is
on, the buzzer sounds in the machine). The display window shows the
cause of the failure.
■ Dual power supplies,support hot plug,AC220V or DC48V for option
Technical Parameters
The technical parameters marked in this manual are the results of
tests conducted in accordance with the test conditions and methods
specified in the GY/T143-2000 "specifications and methods of
measurement on AM optical transmitter and receiver used in CATV
systems"
| Item | Unit | Functional Parameter |
| Keywords | CATV Fiber Optic Transmitter 1550nm Optical Transmitter |
| Optical Wavelength | nm | 1550 + 15 |
| Frequency range | MHz | 47~1000 |
| Optical modulation | | Direct modulation |
| Output optical power | mw | 4~10 |
| Nominal input RF level | dBμV | 75±5 |
| RF Flatness in Band | dB | + 0.75 |
| RF Input Reflection loss | dB | ≥16 |
| RF Input resistance | Ω | 75 |
| C/CTB | dB | ≥65 |
| C/CSO | dB | ≥60 |
| C/N | dB | ≥52 |
| Network transponder | | II sort |
| Power consumption | w | 24 |
| Size | mm | 483*400*44 |
