FCC ID: F8I-DLC0802A User Manual - Part 6 ADCP-75-150 • Preliminary Issue A • March 2003 • Section 4: Operation Right-click here to open Host Fwd Att pop-up screen Figure 4-8. HOST RF Display Figure 4-9. Host Fwd Att Pop-Up Screen 2.6 Determine Output Signal Level at STM Antenna Port The RF output signal level should be measured at the STM ANTENNA port to verify that maximum composite signal level is at the required level. Use the following procedure to determine the power level: 1.
ADCP-75-150 • Preliminary Issue A • March 2003 • Section 4: Operation 4. Place the RF ON/OFF switch on the LPA in the ON position. 5. If using a spectrum analyzer, proceed to step 6. If using a power meter, measure the composite signal power from the STM and then proceed to step 8. 6. Measure the RF level of a single carrier, such as the control channel, in dBm. Make sure the resolution bandwidth of the spectrum analyzer is 30 kHz. 7.
ADCP-75-150 • Preliminary Issue A • March 2003 • Section 4: Operation Right-click here to open the Remote Fwd Att pop-up screen RF output signal level Figure 4-10. REMOTE LPA Display 2. Check the level of the RF output signal (as determined in Section 2.6) against the system design plan specifications. Table 4-1 shows the output signal level required to provide 5 watts per channel for systems with 1 to 2 channels. The maximum output signal level permitted for the system is 40.5 dBm (11 Watts). 3.
ADCP-75-150 • Preliminary Issue A • March 2003 • Section 4: Operation Figure 4-11. Remote Fwd Att Pop-Up Screen 6. Verify that the appropriate RF output signal level appears in the RF Pwr-VSWR Low section (see Figure 4-10). This is primarily a reference value and should not take the place of external test equipment when determining the power level of the composite RF output signal.
ADCP-75-150 • Preliminary Issue A • March 2003 • Section 4: Operation Right-click here to open the Host Rev Att pop-up screen Right-click here to open the Host Div Rev Att pop-up screen Figure 4-12. HOST RF Display 5. Right-click on the Host Rev Att section of the display (see Figure 4-12). The Host Rev Att pop-up screen will open as shown in Figure 4-13. Figure 4-13. Host Rev Att Pop-Up Screen 6. Enter the attenuation value that will provide the required gain.
ADCP-75-150 • Preliminary Issue A • March 2003 • Section 4: Operation Table 4-2. Reverse Path Attenuation Settings and Nominal Gain Provided ATTENUATION SETTING GAIN PROVIDED 0 dB → 2.
ADCP-75-150 • Preliminary Issue A • March 2003 • Section 4: Operation 2. Right-click on the Host Fwd Delay section of the display (see Figure 4-14). The Host Fwd Delay pop-up screen will open as shown in Figure 4-15. 3. Obtain the value of the forward delay as specified in the system design plan. The delay is adjustable in 0.1 µsec steps. 4. Enter the forward path delay value and click OK to close the pop-up screen and to make the changes take effect. 5.
ADCP-75-150 • Preliminary Issue A • March 2003 • Section 5: Maintenance SECTION 5: MAINTENANCE 1 SYSTEM MAINTENANCE OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1 2 FAULT DETECTION AND ALARM REPORTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-2 3 FAULT ISOLATION AND TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ADCP-75-150 • Preliminary Issue A • March 2003 • Section 5: Maintenance 2 FAULT DETECTION AND ALARM REPORTING The Digivance system on-board embedded software detects various unit and system faults and reports them as either Major or Minor alarms. A Major alarm indicates that the system has failed in a way that directly affects RF transport performance. This usually means that some calls or perhaps all calls cannot be made over the system.
ADCP-75-150 • Preliminary Issue A • March 2003 • Section 5: Maintenance Table 5-1. Host Unit LED Indicators INDICATOR COLOR DESCRIPTION Green Off Indicates if the HU is powered or un-powered. The DC power source is on. The DC power source is off. POWER STANDBY Indicates if the system is in the standby, normal, test, or program load mode. Green (blinking) The HU is in the standby mode. Yellow (blinking) The HU is in the program load mode. Red (blinking) The HU is in the test mode.
ADCP-75-150 • Preliminary Issue A • March 2003 • Section 5: Maintenance Table 5-3. Spectrum Transport Module LED Indicators INDICATOR COLOR DESCRIPTION Green Red Indicates if the STM is powered by the AC power source or the back-up battery system. The STM is powered by the AC power source. The STM is powered by the back-up battery system. AC POWER STANDBY Indicates if the system is in the standby, normal, test, or program load mode. Green (blinking) The STM is in the standby mode.
ADCP-75-150 • Preliminary Issue A • March 2003 • Section 5: Maintenance 3 FAULT ISOLATION AND TROUBLESHOOTING Alarm information may be accessed and faults isolated using the information provided by the unit front panel LED indicators, the DEMS software GUI alarm displays, or the NOC-EMS interface.
ADCP-75-150 • Preliminary Issue A • March 2003 • Section 5: Maintenance Table 5-6.
ADCP-75-150 • Preliminary Issue A • March 2003 • Section 5: Maintenance Table 5-7. Host Unit Fault Isolation and Troubleshooting, continued LED: REMOTE UNIT Color: Yellow Alarm Type: Minor PROBLEM: A minor alarm fault is detected at the RU. POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. The STM or LPA is overheating. 1. Check RU LED indicators and refer to Table 5-8 LED: REMOTE UNIT Alarm Type: Major Color: Red PROBLEM: A major alarm fault is detected at the RU.
ADCP-75-150 • Preliminary Issue A • March 2003 • Section 5: Maintenance During normal STM operation, all LED’s should be green except the STANDBY LED which should be Off. When a Minor alarm occurs, one or more of the LED’s will turn yellow. When a Major alarm occurs, one or more of the LED’s will turn red. It is recommended that whenever there are multiple alarms, the optical alarms should be checked and cleared first.
ADCP-75-150 • Preliminary Issue A • March 2003 • Section 5: Maintenance Table 5-8. STM Fault Isolation and Troubleshooting, continued LED: STM Color: Red Alarm Type: Major PROBLEM: A major alarm fault detected by the STM. POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. Fiber optic link fault. 2. The HU is not powered. 3. HU and STM band mismatch. 4. The STM has failed. 1. Follow procedure specified when the PORT 1/ PORT 2 LED is red. 2. Check HU LED indicators and refer to Table 5-7 3.
ADCP-75-150 • Preliminary Issue A • March 2003 • Section 5: Maintenance During normal LPA operation, the STATUS LED should be blinking green (normal operation) or blinking yellow (minor fault). Table 5-9. LPA Fault Isolation and Troubleshooting LED: STATUS Color: Green Alarm Type: None PROBLEM: The LPA is in the forced shutdown state. POSSIBLE CAUSES 1.The MUTE/NORM/RESET switch is in the MUTE position or the LPA was set in the dis -able mode through the DEMS computer. 1.
ADCP-75-150 • Preliminary Issue A • March 2003 • Section 5: Maintenance 1. Put on the IR filtering safety glasses. 2. Notify the NOC or alarm monitoring system operator that the system is going offline. 3. At the HU and at the STM, place the On/Off switches in the OFF position (press O). Note: Turning off the HU and STM disables the respective lasers which is necessary in order to safely inspect and clean the optical connectors. 4.
ADCP-75-150 • Preliminary Issue A • March 2003 • Section 5: Maintenance 18. Repeat steps 3 through 17 for each optical fiber that requires testing. 19. When ready to put the system back into service, place the On/Off switch in the ON position (press I) at both the HU and STM. 20. Notify the NOC or alarm monitoring service that the system is going back online. 4.2 Optical Loopback Test The following procedures provide tests to determine if an optical port fault exists with the Host Unit or with the STM.
ADCP-75-150 • Preliminary Issue A • March 2003 • Section 5: Maintenance 4.2.2 STM Loopback Test 1. Put on the IR filtering safety glasses. 2. Notify the NOC or alarm monitoring system operator that the system is going offline. 3. At the STM, place the On/Off switch in the OFF position (press O). 4. Disconnect the optical fiber connectors from the PORT 1 and PORT 2 optical ports and place a dust cap over each connector. 5. Plug a 15 dB in-line optical attenuator into the PORT 1 optical port. 6.
ADCP-75-150 • Preliminary Issue A • March 2003 • Section 5: Maintenance Table 5-10. Scheduled Maintenance INTERVAL ITEM REQUIREMENT 12 months RU outdoor cabinet filters* Remove and clean the RU outdoor cabinet filters. Refer to Section 5.2 for the required procedure. 60 months HU Fans STM Fan LPA Fan Remove and replace the cooling fans in the HU, STM, and LPA. Refer to specified section for the required procedures: HU see Section 5.3, Section 5.4, and LPA see Section 5.5.
ADCP-75-150 • Preliminary Issue A • March 2003 • Section 5: Maintenance 5.3 Host Unit Fan Replacement Procedure The HU is equipped with two cooling fans which are located on the right side of the HU enclosure. The cooling fans blow cool air into the enclosure. Heated air is exhausted through the vent openings on the left side of the enclosure. Replacement of the fans requires that the HU be turned off for a short period of time. Use the following procedure to remove and replace the HU cooling fans: 1.
ADCP-75-150 • Preliminary Issue A • March 2003 • Section 5: Maintenance 16173-B Figure 5-3. Removing Host Unit Fans From Grill 8. Remove both fans from the grill 9. Use the rivets removed in step 7 to secure the replacement fans to the grill. Orient each fan so the wiring harness is on the top and the arrow on the fan points into the enclosure. 10. Connect the two wiring harness connectors to the circuit board connectors. 11.
ADCP-75-150 • Preliminary Issue A • March 2003 • Section 5: Maintenance 2 Disconnect optical fiber connectors. Place a dust cap over each cable connector and port adapter. 3 Disconnect service connector (if present) 1 Disconnect AC power connector 4 Disconnect alarm connector 5 Disconnect antenna connector 18661-A Figure 5-4. Spectrum Transport Module Cable Connections 5. Loosen the captive screws that secure the STM to the RU cabinet mounting shelf and carefully withdraw the STM from the cabinet.
ADCP-75-150 • Preliminary Issue A • March 2003 • Section 5: Maintenance 7. Carefully withdraw the fan/grill assembly from the enclosure until the wiring harness is exposed and the connector is accessible. 8. Lift the small latch on the wiring harness connector and carefully unplug the connector from the circuit board connector. 9. Remove the plastic rivets that secure the fan to the mounting plate and grill by pushing outward on the rivet center post until the rivet can be withdrawn as shown in Figure 5-6.
ADCP-75-150 • Preliminary Issue A • March 2003 • Section 5: Maintenance 5.5 Linear Power Amplifier Fan Replacement Procedure The LPA is equipped with a front and cooling fan. The front fan draws cool air into the LPA enclosure. Replacement of the fans requires that the STM be turned off for a short period of time and that the LPA be removed from the cabinet. Use the following procedure to remove and replace the LPA cooling fans. 1.
ADCP-75-150 • Preliminary Issue A • March 2003 • Section 5: Maintenance 10. Connect the fan assembly wiring harness connector to the LPA internal connector. 11. Secure the fan assembly to the LPA using the four retainers removed in step 5. 12. Place the STM On/Off switch in the ON position (press I) and verify that the fan operates properly. The fan should draw air into the LPA. 13. Notify the NOC or alarm monitoring system operator that the system is going back online.
ADCP-75-150 • Preliminary Issue A • March 2003 • Section 6: General Information SECTION 6: GENERAL INFORMATION Content Page 1 WARRANTY/SOFTWARE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1 2 SOFTWARE SERVICE AGREEMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1 3 REPAIR/EXCHANGE POLICY . . . . . . . . . . . . . . . . . . . . . . . . . .
ADCP-75-150 • Preliminary Issue A • March 2003 • Section 6: General Information 4 REPAIR CHARGES If the defect and the necessary repairs are covered by the warranty, and the applicable warranty period has not expired, the Buyer’s only payment obligation is to pay the shipping cost to return the defective Product. ADC will repair or replace the Product at no charge and pay the return shipping charges.
ADCP-75-150 • Preliminary Issue A • March 2003 • Section 6: General Information 7 CUSTOMER INFORMATION AND ASSISTANCE PHONE: EUROPE Sales Administration: +32-2-712-65 00 Technical Assistance: +32-2-712-65 42 EUROPEAN TOLL FREE NUMBERS Germany: 0180 2232923 UK: 0800 960236 Spain: 900 983291 France: 0800 914032 U.S.A.
www.adc.
