1550nm direct-dimming Transmitter

Product Name:

1550nm direct-dimming Transmitter

(OT-1550nm-2*7dB)

Features：

• In the CATV and telephone applications launch of PAL, NTSC, digital or compressed digital information.
• Using high linearity, optical isolation, distributed feedback, DFB laser thermoelectric cooling.
• Front panel display and working conditions by the microprocessor-controlled diagnostic tests.
• RF input bandwidth 47-1003MHz, transfer of up to 59 PAL channels.
• built-in RF driver amplifier, just a low drive level input.
• automatic laser modulation (OMI) control, AGC & MGC.
• with front panel RF input test point.
• industry-standard status monitoring interface. ² ²
• Wavelength 1550nm.

Product overview：

²1550nm direct-dimming transmitter is a high-index multifunctional AGC and dual optical transmitter modules, CATV and telephone applications in the transmission of PAL, NTSC digital or compressed digital signals. The series transmitter with high linearity, optical isolation, distributed feedback, DFB laser is used as the basis of thermoelectric refrigeration, for multi-channel television signal transmission specially designed. Equipped with comprehensive and reliable optical power output of a stable thermoelectric cooler circuit and laser temperature control circuit to ensure optimal machine performance and long life laser stability.

• Double Module RF-driven, highly efficient pre-distortion correction laser.(1550nm direct modulation, laser)

CNR≥52dB、CTB≤-67dB、CSO≤-62Db

• Automatic laser modulation (OMI) control, AGC & MGC.

Work on the AGC state, input level in the 78dBμV ~ 88dBμV range of the system can achieve the best indicator.

Working in MGC state, through the front panel ATT, can be adjusted within the scope 75dBμV ~ 90dBμV.

• 20 OMI dedicated front-panel status display (Modulation Depth), can be intuitively adjust and tips

Laser modulation to normal (NOM) or low (LOW), too high (High).

Work on the AGC status, RF rated input range, OMI has been NOM will be in the state.

MGC works in the state, regulate ATT, can be easily OMI is NOM

• Built-in dual power supply backup, automatic switching.

Can be a single-supply operation, the other only for Cold backup (recommended routine to be shipped).

Dual power supplies can work simultaneously, the other only for hot backup, such as the one of them is damaged, then automatically switch to the other. Switching time ≤ 10μS.

• automatic temperature control chassis to ensure long-life laser work.

Chassis temperature monitoring by the microprocessor, indicating Ping timely showing that the actual work of chassis temperature.

When the chassis temperature is higher than set value (45 ℃), the rear panel of the two highly efficient axial fan will automatically open, forced cooling.

When the temperature is reduced to set value (35 ℃), it will automatically shut down, extending fan life.

dual RF inputs.

AM Interface       Input 59 Road, PAL-D (47-550MHz)

Digital Interface (-10dB)     Digital video input (550-750MHz)

using this dictionary：

This machine has the work of the front panel status indicators, green display is working properly, the red light flashing display alarm.

• Plug the power plug connected to power, such as the machine is working properly, then the digital panel displays “READY: KEY OFF”, the red light.
• For the protection of optical transmitter safety work, this machine has the power delay function, that is, when the boot keys, the need to delay a few seconds, laser will start. Status indicator changes from red light green light, digital panel displays the aircraft model.
• V oice prompts:

Normal operation of the machine when the fixed time intervals will be issued BIP slow beep sound: When there is failure, BIP will be issued a hasty voice.

• Menu Description
• Lasers laser operating parameters
• The machine number and date of manufacture
• Powers machine voltage
•  Omi level  AGC/MGC  ATT .

using this dictionary

• Laser  Menu

Laser  Current  （Laser bias current）

Laser   Temp  （ Laser temperature）

Laser   Tex     （Laser cooling current）

Laser  Oup    （Laser output power）

• System  Menu

Laser  S/N  （Laser ID / Machine ID）

S/N          (date production)

• Powes  Menu

+5V  -5V  +24V （Machine voltage）

•  OMI  Level  Menu

（With Managed）RF  Mode=MGC （Modulation Debugging）、press “enter ATT modulation suitable number 0-3000, according to ∧ ∨ key AGC / MGC switch, according to” return to the menu.

（ordinary-sized）RF  Mode=MGC （Modulation Debugging）ATT modulation front panel, press Select to enter key press ↓ by ↑ ↓ Select button by AGC / MGC switch

•  The machine status information in any one exception occurs when the alarm will be triggered (red flashing), the microprocessor will cut  off the laser  power, the digital board displays cause of troubles.
• Local RF input is too high, too low to trigger alarms (RF red light).

Topswitch:

• the machine should have a good grounding, grounding resistance should be <4Ω. According to international standards, 220V into the line three-wire system. Midline for the ground wire.
• This machine adopts imported high-linear, highly reliable switching power supply with constant voltage over-current protection, which has been equipped with fuses, may be 110 ~ 254VAC grid work. The machine’s microprocessor output DC voltage of the monitors, if the fuse blew, indicating failures have occurred inside the machine. Therefore, the rear panel of this machine with no fuse holder.
• Local optical signals output to FC / APC interface, other types (such as FC / PC) and its distribution could not pick. Connector should be installed to keep clean.
• This machine into operation, do not look directly at the back panel of the light output port, so as not to cause harm.
• The machine determines the RF drive level adjustment system for optical transmitters. Therefore, also determines the system of indicators (CNR, CTB, CSO). In the 59 Road, PAL-D transmission, HC-8600 Series Optical Transmitter RF input level to 20dBmV. N-channel system in the transmission, the RF input level should be revised following formula:

Si（N）=20+10Lg（59∕N）   （dBmV）

Carrier to noise ratio degradation form： 

    (59 Rd PAL-D，CTB=65dB，CSO=60dB)

《Performance indicators》

Warranty Policy:

• fiber optic equipment warranty for one year. Failure during the warranty period, repairs can be handled through the company. Improper use by the user of the product or on its own to change or irresistible force, resulting in direct or indirect damage or the resulting device link sexual responsibility, the company is not invited, but any legal responsibility. For this damage to the equipment, the company may carry out maintenance, as appropriate, collect materials, maintenance costs and lost fees. Product sold a year later, the company responsible for product life-long maintenance, where appropriate, collect materials, fees, maintenance fees and transport costs.

Anti-revisionism procedures:

• Users find the machine fails, they should notify us. The following information: the machine model, failure phenomena, purchase date, product number, your mailing address, the company immediately to inform you of products will be damaged remitted the designated locations, receipt of damaged product immediately after maintenance, to the user, warranty The products will continue to enjoy the remaining warranty period.