manualshive.com logo in svg

CSI FIBERLINK RA-1900, Руководство пользователя, Страница: 14 / 17

Поделиться
Скачать
CSI FIBERLINK RA-1900 Скачать руководство пользователя страница 14

4

Theory of Operation

The Fiberlink XA-1900 converts an incoming audio signal into a varying current
that intensity modulates the transmitting LED located in the optical connector on
the unit.  The modulated light is then applied to a fiber optic cable.

The RA-1900 detects the light coming from a fiber optic cable by a photodiode
located in the optical connector on that unit.  The small current produced by the
photodiode is amplified and applied to a driver stage.  This stage provides the
proper output voltage to drive the required load.  The output level adjustment is
used to set the output audio to the proper level.

The XA-1903 is functionally the same as 10 XA-1900 units in one housing.

The XR-1900 is functionally the same one XA-1900 and one RA-1900 in the
same housing.

13

OVERALL SYSTEM CHECKOUT AND

TROUBLESHOOTING TECHNIQUES

Occasionally, during the installation of a fiber optic system, difficulties arise that
are the result of factors beyond the control of the installer.

It is to simplify the task of the installer that the following general checkout
procedure is included.

A.  Check Transmitter or Transmit Section of a Transceiver

1. Is operating power (DC, AC, Voltages) correct?

2. Are the correct pins on the connector or terminal block being used?

3. Is the correct signal level present at transmitter input?

4. Does the transmitting LED glow dimly when a signal is applied?  Note

that this is only true for an operating wavelength of 850 nm.  Units at
1300 nm are totally invisible.*

5. If the unit is an analog or video transmitter (at 850 nm), is there a

continuous dim glow from the transmitting LED? *

6. Is the optical connector on the transmitting LED clear of any obstruc-

tion or minute dirt particles?

7. Does the fact that the power ground and signal ground of many systems

are common, matter?

8. Does the fact that the power ground, signal ground, and case are

common cause a short circuit anywhere in the system?

*  The above visual check should only be attempted with LEDs.

NEVER LOOK DIRECTLY AT AN OPERATING

LASER

 DIODE REGARDLESS OF THE

OPERATING WAVELENGTH!!!

US Government regulations require that all equipment using Laser Diodes be

clearly identified with appropriate warning

 

labels.  Be sure to heed these labels.

Содержание FIBERLINK RA-1900

Страница 1: ...em WORLD HEADQUARTERS 55 Cabot Court Hauppauge NY 11788 USA TEL 631 273 0404 FAX 631 273 1638 WWW http www commspecial com EMAIL info commspecial com Communications Specialties Pte Ltd 100 Beach Road 22 09 Shaw Tower Singapore 189702 TEL 65 6391 8790 FAX 65 6393 0138 EMAIL csiasia commspecial com ...

Страница 2: ...t be obtained from Communications Specialties before any equipment is returned by the Buyer All material must be shipped to Communications Specialties at the expense and risk of the Buyer Communications Specialties obligation under this warranty will be limited at its option to either the repair or replacement of defective units including free materials and labor In no event shall Communications S...

Страница 3: ...ble This may be difficult to see in many cases but a dim glow may be present with 850nm light Other wavelengths such as 1300 nm are totally invisible 4 Is the optical connector on the receiver optical port clear of any obstruction or minute dirt particles 5 Does it matter that the power ground and signal ground of many systems are common MAINTENANCE The Fiberlink XA 1900 XA 1903 RA 1900 and XR 190...

Страница 4: ...full bandwidth 1 3 mv rms max Optical Loss Budget 50u Fiber 0 10 dB 62 5u Fiber 0 13 dB 8 10u Fiber 0 10 dB Operating Wavelength 850 nm 1300 nm Optical Connectors ST SMA or FCPC Operating Temperature Range 20 to 60 degrees C 14 B Check Optical Connectors 1 If stepped 906 type SMA optical connectors are being used are the short plastic alignment sleeves normally supplied with the connectors being u...

Страница 5: ... task of the installer that the following general checkout procedure is included A Check Transmitter or Transmit Section of a Transceiver 1 Is operating power DC AC Voltages correct 2 Are the correct pins on the connector or terminal block being used 3 Is the correct signal level present at transmitter input 4 Does the transmitting LED glow dimly when a signal is applied Note that this is only tru...

Страница 6: ...ponds to the signal being transmitted 4 Apply the signal to be transmitted and slowly turn the attenuator until the signal appears on the scope Now continue to turn the attenuator until a maximum peak to peak amplitude of 0 8 volts is obtained This point constitutes full modulation If the signal level is increased further distor tion and clipping will occur The best level is just below the clippin...

Страница 7: ...OR AC OPERATION A No Connection 14 to 18 volts 50 60Hz B 15 to 25 volts No Connection D DC Common AC Common E No Connection No Connection H No Connection No Connection Please note that AC and DC common is connected to the enclosure The mating power connector for this system is an Amphenol 126 223 or equivalent For operation from 115 VAC 60Hz a Communications Specialties XP 1000A plug in adapter ma...

Страница 8: ...C input is connected to the case The XA 1903 operates from 115 239 VAC 50 60 Hz Optical Fiber Versions of the XA 1900 and XA 1903 are available to drive most multimode MM and single mode SM optical fibers The specific models are identified by a suffix at the end of the model number as follows 10 Operating Pointers Output Signal The output of the RA 1900 and XR 1900 is designed to drive load impeda...

Страница 9: ...hould be a 1 KHz 1 volt rms sine wave 2 Connect the fiber optic cable from the transmitter to the receiver and a 600 ohm load resistor to the output connector of the receiver 3 Connect an oscilloscope across the 600 ohm load resistor 4 Adjust the output level control until 1 volt rms is obtained 5 This completes alignment of the receiver 9 The XR 1900 consists of an XA 1900 and RA 1900 in the same...

Страница 10: ...hould be a 1 KHz 1 volt rms sine wave 2 Connect the fiber optic cable from the transmitter to the receiver and a 600 ohm load resistor to the output connector of the receiver 3 Connect an oscilloscope across the 600 ohm load resistor 4 Adjust the output level control until 1 volt rms is obtained 5 This completes alignment of the receiver 9 The XR 1900 consists of an XA 1900 and RA 1900 in the same...

Страница 11: ...C input is connected to the case The XA 1903 operates from 115 239 VAC 50 60 Hz Optical Fiber Versions of the XA 1900 and XA 1903 are available to drive most multimode MM and single mode SM optical fibers The specific models are identified by a suffix at the end of the model number as follows 10 Operating Pointers Output Signal The output of the RA 1900 and XR 1900 is designed to drive load impeda...

Страница 12: ...OR AC OPERATION A No Connection 14 to 18 volts 50 60Hz B 15 to 25 volts No Connection D DC Common AC Common E No Connection No Connection H No Connection No Connection Please note that AC and DC common is connected to the enclosure The mating power connector for this system is an Amphenol 126 223 or equivalent For operation from 115 VAC 60Hz a Communications Specialties XP 1000A plug in adapter ma...

Страница 13: ...ponds to the signal being transmitted 4 Apply the signal to be transmitted and slowly turn the attenuator until the signal appears on the scope Now continue to turn the attenuator until a maximum peak to peak amplitude of 0 8 volts is obtained This point constitutes full modulation If the signal level is increased further distor tion and clipping will occur The best level is just below the clippin...

Страница 14: ... task of the installer that the following general checkout procedure is included A Check Transmitter or Transmit Section of a Transceiver 1 Is operating power DC AC Voltages correct 2 Are the correct pins on the connector or terminal block being used 3 Is the correct signal level present at transmitter input 4 Does the transmitting LED glow dimly when a signal is applied Note that this is only tru...

Страница 15: ...full bandwidth 1 3 mv rms max Optical Loss Budget 50u Fiber 0 10 dB 62 5u Fiber 0 13 dB 8 10u Fiber 0 10 dB Operating Wavelength 850 nm 1300 nm Optical Connectors ST SMA or FCPC Operating Temperature Range 20 to 60 degrees C 14 B Check Optical Connectors 1 If stepped 906 type SMA optical connectors are being used are the short plastic alignment sleeves normally supplied with the connectors being u...

Страница 16: ...ble This may be difficult to see in many cases but a dim glow may be present with 850nm light Other wavelengths such as 1300 nm are totally invisible 4 Is the optical connector on the receiver optical port clear of any obstruction or minute dirt particles 5 Does it matter that the power ground and signal ground of many systems are common MAINTENANCE The Fiberlink XA 1900 XA 1903 RA 1900 and XR 190...

Страница 17: ...t be obtained from Communications Specialties before any equipment is returned by the Buyer All material must be shipped to Communications Specialties at the expense and risk of the Buyer Communications Specialties obligation under this warranty will be limited at its option to either the repair or replacement of defective units including free materials and labor In no event shall Communications S...

Отзывы:

Нет отзывов