Kaidexing

Tel：400-110-9708

Fax：86(010)-82719489-806

Mail：kdx@cnkdx.com , cnkdx@126.com

Web：http://www.cnkdx.com

Add：1221/1245, Building A, Building 1, Jiayuan East District, Qinghe, Haidian District, Beijing

Second, an overview of

KDX -7500 series optical transmitters and telephone in CATV transmission applications, PAL, NTSC digital or compressed digital signal.The series transmitters to high linearity, optical isolation, the distribution of feedback, thermoelectric refrigeration DFB laser-based, for the multi-channel television signal transmission specially designed.Equipped with sound and reliable optical power output circuit and laser stability Peltier temperature control circuit to ensure that the whole the best performance and stability of long-lived lasers.

Laser machine for all working parameters and monitoring functions are in a microcomputer control.The LCD on the front panel LCD display and laser working state-related information.Once the laser operating parameters deviate from the permissible range set by the software will automatically breaking laser power. At the same time prompted alarm, LCD liquid crystal display shows the cause of the malfunction.

The machine is packaged in a high-1.75 "(44.45mm) Width 19" (482.6mm) aircraft shell installed.Each transmitter is equipped with independent power supply, available at 110 ~ 254VAC power grids work.

Third, key indicators

Local power switch next to the previous panel, with the work of the state of LED lights.Green light to show the work of normal, red light flashing display alarm.

1, plug in the power plug to connect the power, such as the machine working properly, then the number of panel display 'READY: KEY OFF', the red light.

2, for the protection of optical transmitter safety work, the local power supply has a delay function, that is, when the key to boot, the need to delay a few seconds, lasers will be activated. Status Indicator from red to green, digital panel display aircraft models.

3, the operator can STATUS (state) button, then read out the key to the machine operating parameters.The first LCD panel LCD screen can be seen in the following order of the local state information

① Model: ONT-7502 (04.06.08.10.12.14.16.18)

② POWER (mW): output optical power display actual output optical power

③ TEMP (℃): laser machine laser temperature display temperature

④ BIAS (mA): bias current (show machine laser bias current)

⑤ COOLING / HEATING (mA): refrigeration / heating machine laser show refrigeration or heating system operating current

⑥ READS +5 V (V): 5V detection machine +5 V shows the actual voltage

⑦ READS +24 V (V): +24 V detection Showing machine +24 V actual voltage

⑧ READS-5V (V):-5V detected inside-5V actual voltage 4, the local state information in 2 ~ 8, the occurrence of any of the abnormal, the Administration will trigger Alarm (red light flashing), the microprocessor will cut off the laser power, the number of board showed the cause of the malfunction.

5, when the LCD liquid crystal display shows "INTERLOCK", at the same time the red light flashes, said after the panel remote interlock connectors / alarm relay connector joints was torn off and are to be connected to post and cut off the power supply can be reset.

6, the local RF input level too high, would trigger alarm (red light flashing). Must cut off the power supply can be reset

V. Notes

1, the machine should have a good grounding, grounding resistance should be<4Ω in accordance with international standards, 220V line into a three-wire system, the center line for the grounding line.

2, The machine adopts the imported high-performance, highly reliable switching power supply with a constant voltage over-current protection features, which have fuses, 110 ~ 254VAC in the power grids work.The local microprocessor on the DC output voltage monitor, if the blown fuse on the machine itself, we have to be malfunctioning. Therefore, this machine is no Fuseholder panel.

3, the local optical signal output for the FC / APC interface, other types (such as FC / PC) can not take its allocation.Joints should be kept clean install.Plug repeated application of ethanol after the cleaning.

4, this machine to enter the working condition, do not open the back plate of the light output mouth, so as not to cause harm.

5, the local-level RF-driven decision optical transmitter modulation.Therefore, the system has also decided to indicators (CNR, CTB, CSO).59 Road in PAL-D transmission, ONT-7500 series optical transmitter RF input level for 20dBmV. N system in the transmission channels, the RF input level should be under the fixes:

Si(N)=20+10Lg(59/N) (dBmW) Si (N) = 20 +10 Lg (59 / N) (dBmW)

6, the local carrier to noise ratio of 59 road deterioration table PAL-D.N system in the transmission channels, the CNR CNR (N) pressing fixes:

CNR(N)=CNR(59)+10Lg(59/N) (dB) CNR (N) = CNR (59) +10 Lg (59 / N) (dB)

We conduct quality inspections on raw materials to ensure the reliability and stability of the mechanical product manufacturing process.

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Beijing KDX Electronic Information Technology Co., Ltd., is located in Beijing's Haidian High-tech Development Zone, Company comprehensive modern new energy technology and optical fiber communication technology, is committed to in optical transmission system and image coding device and an operation and maintenance system technology and equipment research and production...

Tel：400-110-9708

Fax：86(010)-82719489-806

Website：http://www.cnkdx.com

Mail：kdx@cnkdx.com , cnkdx@126.com

Add：1221/1245, Building A, Building 1, Jiayuan East District, Qinghe, Haidian District, Beijing