5000 Optical Amplifiers Setup Procedures

Transcript

Doc. 2272064, Rev. B Rel. 11/00 5000-ODA Amplifiers Ref. and Install. Manual Set-Up Procedures Checking the Optical Input Power, page 25 • Checking the Optical Output Power, page 27 • Adjusting the Optical Output Power, page 29 • About Manual Shutdown Contacts, page 30 • Using the LCD to Monitor Operating Parameters, page 31 Thumb tab • Amp In this section, you will find information about the following procedures: Before You Start Review the procedure(s) before beginning these installation procedures. Then, gather all necessary tools and equipment. (See "Tools and Equipment".) Observe the following cautions: WARNING When powered, optical transmitters and amplifiers generate invisible, high-energy laser beams. Even when the transmitter is not powered, laser beams may be present in the incoming cable. Although you can’t see them, these beams can cause tissue injury, including permanent eye damage. Whenever the optical cable is disconnected from the receiver or patch panel, avoid direct contact with the end of the cable. The procedures documented here focus on what’s new or especially important for the 5000 series optical amplifier. While some safety precautions are reviewed, this manual assumes that installers have been trained in safe installation practices (for example, making optical connections or connecting DC power). Users new to cable technologies and servicing procedures should not rely on this manual for comprehensive guidance. Set-Up Procedures 23 Set-Up Be absolutely certain the optical equipment at both ends of the cable is off before performing any procedures. 5000-ODA Amplifiers Ref. and Install. Manual Tools and Equipment Doc. 2272064, Rev. B Rel. 11/00 Hardware Components • 5000 series optical amplifier (AC models come with a power cord) • 19-inch wide rack or cabinet • power source (90 to 260 VAC for AC models or -36 to -60 VDC for DC models) • clean connector caps • required fiber test jumpers and appropriate connector Tools • phillips screwdriver • flat blade screwdriver • tool with a small, non-ferrous point Meters • 24 optical power meter Set-Up Procedures Doc. 2272064, Rev. B Rel. 11/00 5000-ODA Amplifiers Ref. and Install. Manual Checking the Optical Input Power In this procedure, you will check the optical input signal and connect the fiber input cable to the 5000 series optical amplifier’s optical input. Warning Amp Even when the transmitter is not powered, laser beams may be present in the optical cable. Although you can’t see them, these beams can cause tissue injury, including permanent eye damage. Whenever the optical cable is disconnected from the transmitter, receiver or patch panel, avoid direct contact with the end of the cable or the optical output. 1. Turn the laser key switch to OFF. Turn the key switch OFF. Figure 9. Before you begin, turn the key switch to OFF. 2. Clean all fiber connectors thoroughly. Make sure the connector on the fiber input cable matches the type on the amplifier. 3. Using an optical power meter, measure the optical power from the fiber input cable. Verify that the optical input to the amplifier is within the unit’s specifications and meets system design requirements. Set-Up If the optical input is too high, attenuate the signal before it enters the optical amplifier. If the optical input is too low: Set-Up Procedures • verify that the optical output power of the device (transmitter or optical amplifier) feeding this optical amplifier is within the designed range; • check that the designed optical loss between the transmitter and the optical amplifier is in the proper range; and • check for poor optical connections in the link. 25 5000-ODA Amplifiers Ref. and Install. Manual Doc. 2272064, Rev. B Rel. 11/00 Optical Input Figure 10. Plug the fiber input cable into the amplifier’s input bulkhead connector, labeled IN on the unit’s back panel. 4. Lift the spring-loaded safety shutter from the amplifier’s input bulkhead connector. Plug the fiber input cable into the amplifier’s input connector. You have completed this procedure. Proceed to “Checking the Optical Output Power” on page 27. 26 Set-Up Procedures Doc. 2272064, Rev. B Rel. 11/00 5000-ODA Amplifiers Ref. and Install. Manual Checking the Optical Output Power Warning: Turn off the laser before you connect or disconnect fiber cables from the optical amplifier’s bulkhead connectors. 1. Turn the laser key switch OFF. The yellow Laser Status LED goes out. 2. Clean all fiber connectors thoroughly. Amp 3. Lift the spring-loaded safety shutter from (one of) the amplifier’s output bulkhead connector(s). Then, plug the fiber from an optical power meter into the bulkhead. 4. Verify that the outputs you’re not measuring are covered with safety shutters. Then, turn the laser key switch ON. The yellow Laser Status LED lights. Back Panel Optical Output 5. Check that the unit’s optical output power is not more than 0.5 dB below the output power specification shown on the LCD. Note: If the measured optical output power is lower than the specification, clean all connectors and measure the power again. If the optical output power is still too low, change the fiber jumper and measure again. If the output power is still too low, contact the Philips Broadband Networks’ Broadband Systems Center. For information about contacting the Broadband Systems Center, see “About Technical Support” on page vi. 6. Verify that the optical amplifier’s output power launched into a length of fiber, is at or below the SBS suppression rating of the transmitter feeding it. For more information, see "Checking for an SBS Suppression Problem" on page 28. 7. Turn the laser key switch OFF. The yellow Laser Status LED will go out. Set-Up Procedures 27 Set-Up Figure 11. The amplifier’s optical output connector is on the unit’s back panel. (One output model shown.) 5000-ODA Amplifiers Ref. and Install. Manual Doc. 2272064, Rev. B Rel. 11/00 8. Disconnect the power meter from the bulkhead and connect the system fiber. 9. Repeat steps 1-8 to check all other optical output. Be sure to verify that the laser key switch is OFF before you connect the power meter to the bulkhead. Once you have checked all optical outputs, proceed to step 10. 10. Activate the laser(s) by turning the key switch ON. The yellow Laser Status LED will light. When you turn the key switch ON, the LCD, if clear, will turn on and start at the beginning of the LCD display cycle. 28 Set-Up Procedures Doc. 2272064, Rev. B Rel. 11/00 5000-ODA Amplifiers Ref. and Install. Manual Adjusting the Optical Output Power You may adjust the amplifier’s optical output power from the front panel. Using these controls, you can increase the optical output power by up to 0.5 dB or decrease the optical output power by 1.25 dB from the factory-setting. Resets optical output power to factory setting. Increases the optical output power in 0.25 dB steps. Amp Decreases the optical output power in 0.25 dB steps. Front Panel Figure 12. Adjust the optical output power from the front panel. • Press Æ, to increase the optical output power by 0.25 dB. • Press Ç to decrease the optical output power by 0.25 dB. • Press Reset to return optical output power to its factory setting. Set-Up Proceed to “About Manual Shutdown Contacts” on page 30. Set-Up Procedures 29 5000-ODA Amplifiers Ref. and Install. Manual Doc. 2272064, Rev. B Rel. 11/00 About Manual Shutdown Contacts The 5000 series optical amplifiers are shipped with a jumper wire across the manual shutdown contacts on the back panel. Unless you plan to connect the unit to a device driver which will provide shutdown control, leave the jumper wire in place, as shown below. Manual Shutdown Contact (two center screws only) GND Shutdown Figure 13. The manual shutdown contact is on the amplifier’s rear panel. Warning To avoid damage, verify that the ground (GND) terminal is connected to control signal ground (ground) before connecting it to equipment used for manual shutdown. Proceed to “Using the LCD to Monitor Operating Parameters” on page 31. 30 Set-Up Procedures Doc. 2272064, Rev. B Rel. 11/00 5000-ODA Amplifiers Ref. and Install. Manual Using the LCD to Monitor Operating Parameters The amplifier’s LCD screen displays alarm messages and status information, one line at a time. The LCD shows information in a specific order, beginning with alarm conditions and continuing with key operating parameters. To display each line of information, press the Display Next button, shown in Figure 14. LCD Screen Amp Display Next Button Figure 14. Press the Display Next button to display key parameters. Sequence of Displayed Messages The table below shows the sequence in which the alarms and status information are displayed. Table 4: Message Sequence Condition/Status Appears on LCD 1 Alarm/Warning Condition Various. See “Alarm and Warning Messages” on page 32. See “Alarm and Warning Messages” on page 32. 2 Optical Input Power Pwr In: XX.X dBm Pwr In: -X.X dBm Pwr In: <-2 dBm Optical power entering unit. 3 Optical Output Power Pwr Out XX.X dBm Pwr Out LOW Optical power leaving the unit. Optical power leaving the unit is below the warning threshold. 4 Pump x Bias Current Pump 1 Bias: OK/OFF Pump 2 Bias: OK/OFF OK: Bias of pump laser (1 or 2) is within normal operating parameters. OFF: Bias turned off using key switch or manual shutdown. 5 Pump x Temperature P1 Temp: xx C P2 Temp: xx C in degrees C. 6 Unit’s internal temperature Unit Temp: XXC in degrees C. 7 Laser Key Switch Status Keyswitch ON Keyswitch OFF Laser is ON. Laser is OFF. 8 Power Supply Status Pwr Supply OK Pwr Supply Fault Power supply is functioning properly. Power supply is operating out of recommended limits. 9 Unit’s Model Number 10 Unit’s Serial Number 11 Firmware Revision Level REV X.XX Set-Up Procedures Description Revision level of the amplifier’s firmware. 31 Set-Up Display Sequence 5000-ODA Amplifiers Ref. and Install. Manual Alarms and Warnings Doc. 2272064, Rev. B Rel. 11/00 The amplifier’s internal control circuitry checks that several key operating parameters fall within pre-set limits. When any of these parameters exceed the pre-set limits or thresholds, an alarm or warning will appear on the LCD. • An alarm indicates the unit is at immediate risk for failure or that a failure has already occurred. • A warning indicates that the unit is in danger of operating out of specifications. Alarm and Warning Thresholds The table below lists the thresholds for several key operating parameters. An alarm will appear on the LCD if either of the alarm thresholds is exceeded. A warning will appear on the LCD if either of the warning thresholds is exceeded. Note: The alarm LED also will light during an alarm or warning condition. A red light indicates an alarm while a yellow light indicates a warning. Table 5: Alarm and Warning Thresholds Parameter Warning Low Warning High Alarm Low Alarm High Unit Optical Input Power, Line 0 - -2 10 dBm Optical Input Power, Booster 4 - -2 10 dBm -1 +1 -2 +2 dBm Pump 1 Bias Current - 90 - 95 % Pump 2 Bias Current 0 90 - 95 % Pump Temperature - 28 - 30 °C Unit Internal Temperature - 75 - 85 °C Optical Output Powera Key Switch Position - - Off - Manual Shutdown - - Active - +12V +10.8 +13.2 +9.6 +14.4 V -5V -4.85 -5.40 -4.75 -5.5 V Power Suppliesb All specifications are subject to change without notice. Notes: a. Alarm limits centered around current set/preset value. b. Single alarm which is triggered by any of the listed parameters. Alarm and Warning Messages Alarms and warnings, if present, will appear first in the LCD’s display cycle. As you push the Display Next button, each alarm or warning message will appear on the LCD, one at a time. These messages may display in any order. Once all alarms and warnings have displayed, the LCD will cycle through the status information documented in “Using the LCD to Monitor Operating Parameters” on page 31. 32 Set-Up Procedures Doc. 2272064, Rev. B Rel. 11/00 5000-ODA Amplifiers Ref. and Install. Manual The table below lists the meanings of the alarm messages that may appear in the LCD display. Means* ALRM: Pwr In HI Optical input power is above alarm high threshold. ALRM: Pwr In LO Optical input power is below alarm low threshold. ALRM: Pwr Out HI Optical output power is above alarm high threshold. ALRM: Pwr Out LO Optical output power is below alarm low threshold. ALRM: P1 Bias HI Pump laser 1 bias, in % maximum current, is above alarm high threshold. ALRM: P2 Bias Hi Pump laser 2 bias, in % maximum current, is above alarm high threshold. ALRM: P1 Temp HI Pump laser 1 temperature is above alarm high threshold. ALRM: P2 Temp HI Pump laser 2 temperature is above alarm high threshold. ALRM: L Temp LO Laser temperature is below alarm low threshold. ALRM: U Temp HI Unit’s internal temperature is above specified limits. ALRM: Key Off Laser key switch is off. ALRM: Man Shtdown Manual shutdown activated. ALRM: PS FAULT Power supply is not operating as specified. Amp Alarm Message Set-Up *For threshold definitions, see “Alarm and Warning Thresholds” on page 32. Set-Up Procedures 33 5000-ODA Amplifiers Ref. and Install. Manual Doc. 2272064, Rev. B Rel. 11/00 The table below lists the meanings of the warning messages that may appear in the LCD display. Warning Message Means* WRNG: Pwr In LO Optical input power is below warning low threshold. WRNG: Pwr Out Hi Optical output power is above warning high threshold. WRNG: Pwr Out LO Optical output power is below warning low threshold. WRNG: P1 Bias HI Pump laser 1 bias, in % maximum current, is above warning high threshold. WRNG: P2 Bias HI Pump laser 2 bias, in % maximum current, is above warning high threshold. WRNG: P2 Bias LO Pump laser 2 bias, in % maximum current, is below warning low threshold. WRNG: P1 Temp HI Pump laser 1 temperature is above warning high threshold. WRNG: P2 Temp HI Pump laser 2 temperature is above warning high threshold. WRNG: U Temp HI Unit’s internal temperature is above warning high threshold. WRNG: PS FAULT Power supply is not operating as specified. *For threshold definitions, see “Alarm and Warning Thresholds” on page 32. 34 Set-Up Procedures