HiSeasNet Maintenance Visit Report

Transcription

1 Page 1 HiSeasNet Maintenance Visit Report Ship Visited: Ship Location/Port: Woods Hole, MA Date(s) of work: September 15 18, 2007 Work performed by: Visit Purpose: Karl Kapusta Ku-Band Antenna Maintenance Visit and check tracking issues. The ship had just returned from operation in the Mediterranean Ocean using a different satellite and Teleport services. The Seatel antenna tracking system was changed back to operation on Satmex 5 but was not tracking correctly. Major reported symptom was an AGC level lower than the Threshold level. DAC 2200 was due to be replaced under warranty. The original controller had a faulty on/off power switch. The ship left for the Mediterranean Ocean before a replacement could be delivered, so the change out occurred as soon as the ship returned to Woods Hole as part of the regular maintenance visit.

2 Maintenance Checklist Antenna Equipment (ignore SeaTel/Ship-specific points with * for fixed antennas) Initials Action Notes/Discussion KK Take photo of radome exterior * KK Verify air conditioner is in working order, repair as N/A no air conditioner installed needed * KK Confirm/Set final air conditioner temperature set point N/A (85 deg F) * KK Inspect or change air conditioner filter * N/A KK Visual inspection of radome (cracks, abrasions, caulk, - no visible damage leaks, excessive grime, etc.), repair as needed * KK Visual inspection of radome base, legs, and connection no visible damage or rust to ship (rust, warping, etc.), repair as needed * KK Take photo of dome/hub interior KK Perform SeaTel or Vertex service bulletin upgrades/repairs KK Inspect reflector, repair as needed good condition KK Check antenna balance, adjust as needed * balance OK KK Inspect antenna equipment/frame for water or rust, repair as needed the isolation springs were found to be loose. The bolts inside the springs that hold the pedestal mounting plate to the base plate were loose. All bolts were checked and the nuts were tightened. Seatel was informed of this issue and supported the tightening solution KK Inspect antenna equipment/frame for loose weights and hardware, repair as needed * all weights & hardware were tight and secure KK Lube/grease/treat any joints as necessary N/A KK Inspect antenna equipment and wiring harness for loose cables, repair as needed KK Verify power level to pedestal/motors KK Verify pedestal breaker works, repair as needed KK Verify acceptable antenna/controller Power-On Self Test (POST) KK Sweep antenna through entire Az and El ranges KK Take photo of rack gear front KK Record DAC/controller parameters see attached KK Verify DAC parameters are accessible, correct, and saved * KK Verify that GPS inputs to DAC function (if GPS is operational) * KK Verify that gyro inputs to DAC function (if gyro is operational) * KK Verify correct conscan or dishscan settings, adjust as Dishscan in operation needed * KK Verify reasonable blackout zone, adjust as needed * None programmed Page 2

3 Initials Action Notes/Discussion KK Verify reasonable search limits or safety stops for given location and satellite, adjust as needed KK Check Az/El trim values, correct as needed to get longitude search close * Values reset see attached KK Take photo of rack gear rear KK Inspect cabling and connectors behind and around rack gear, repair as needed KK Locate spares kit. Verify completeness of the kit, note No spares missing parts. * KK Upgrade SeaTel/controller firmware with maintenance None required releases as necessary KK Upgrade old ships with Conscan to Dishscan as needed (Revelle, Melville, and Thompson) N/A Page 3 Codan RF Equipment Initials Action Notes/Discussion KK Take photo of converter panel N/A BUC system does not require Transceiver KK Verify converter is not in an undue alarm state N/A no Transceiver KK Verify power levels at power supply (48 VDC, and 110 VAC). Record VDC and VAC N/A 48VDC to the BUC by the Comtech modem was measured to be 47 VDC VAC to antenna motors was measured to be 116 VAC KK Inspect RF coax cables and connectors, repair as needed KK Verify amplifier cooling fan functions BUC fan is operational KK Verify amplifier is not being overdriven, correct as needed KK Locate and test RS-422/RS-232 adapter used with converter, modify pinouts so it is not needed, or verify that it is not needed as is. Note status. No adaptor required KK Locate and test DB-9/MIL serial cable that talks directly to converter cable is used to communicate directly with the BUC KK Locate spare LNB No spare available KK Record settings (include serial number and wattage for BUC) see attached s/n 6C40132F0081 Comtech Modem Equipment Initials Action Notes/Discussion KK Verify settings are accessible, correct, and saved KK Verify modem locks on the correct signal, adjust as needed KK Visually inspect transmit signal directly for clean signal KK Verify expected Eb/No values for given location KK Record settings see attached

4 Initials Action Notes/Discussion KK Upgrade firmware as necessary (at least Rev 1.30) KK Replace 5V PSU power cable if needed N/A Page 4 Cisco Router Equipment Initials Action Notes/Discussion KK Verify cables and connectors are snug and screwed in, repair as needed KK Verify serial cable is a CAB-530MT with Comtech Cisco adapter and modem is in RS-422 mode KK Verify that green connect light on serial card is lit when modem is locked up KK Verify router survives a power cycle and can route traffic within 15 minutes of turning on while connected. Notify techs that they may want to save router settings!! Not Tested Rack Equipment Initials Action Notes/Discussion KK Inspect rack conditions for proper rack gear cooling, lighting, wiring, etc. (Earth station: Verify lights and A/C work) KK Check and record rack air conditioner set point room is cool no thermostat set point available Overall Initials Action Notes/Discussion KK Take photos of ship/dome placement KK Check with ship techs/crew for overall impression of equipment performance and possible problem areas KK Locate spares kit (with help from techs) and verify all SeaTel spares and one LNA exist. Note discrepancies. No spares kit purchased no spares available KK Verify spectrum analyzer shows proper picture of Tx and Rx carriers KK Comment on or correct previous maintenance report issues that were pointed out no open issues from previous operational report

5 Checklist Footnotes Page 5 Discussion General Points 1. The antenna is one of the first 6006 models delivered to customers. The DAC is model # 2200 which uses an L-Band interface instead of the 70 MHz interface found on the C-Band systems (model # 9797). 2. The bolts that attach the pedestal base plate to the radome base plate were loose, and the isolation springs were not under any tension. This allowed the antenna to rock back and forth excessively, even in calm weather, so the antenna was having unexpected difficulty tracking. These bolts were tightened and Seatel was advised of the situation. The bolts will need to be checked at every maintenance interval as part of the maintenance visit. 3. The antenna was mounted with the hatch oriented 90 degrees off from the usual aft position. This orientation required a Home Flag Offset of 0191 to compensate. 4. The antenna was purchased without any spare components. They did purchase second LNB, which has a different RX frequency range, which they can use when operating outside of the HiSeasNet network.

6 Page 6 Photos Sept 07 Radome Placement - #1

7 Page September 07 Radome Placement - #2

8 Page September 07 Radome Exterior-#1

9 Page September 07 Radome Exterior -#2

10 Page September 07 Radome Mounting Plate

11 Page September 07 Radome Interior

12 15-18 September 07 Radome Interior Base Plate Bolts Tightened Page 12

13 Page September 07 Equipment Rack Front View

14 Page September 07 Equipment Rack Side View

15 Page 15 Final Equipment Configuration/Settings HiSeasNet Satellite Equipment Configuration Ship: Date: Sept 07 Location: Woods Hole, MA Satellite: Satmex 5 Un it Setting Description Setting Display Setting Value Notes SeaTel Digital Antenna Controller (DAC) Model DAC 2200 Antenna system is a model (8 Watt Ku-Band amplifier) Serial Number 9606 Firmware Version 5.20 PCU Version 2.44a AGC (Normal, On signal) 1943 Value when antenna is peaked up on signal AGC (Normal, Off Signal) 1652 Value of noise when antenna is not on satellite Latitude LAT 41 N Woods Hole, MA Longitude LON 70 W Woods Hole, MA Heading HDG 63.6 Woods Hole, MA Satellite SAT Satmex 5 satellite Threshold THRS 1731 Antenna Controller locked to hub carrier Intermediate Frequency L-Band Frequency 1250 MHz Shore-to-ship signal frequency to track Baud Rate Tone OFF Volt HORIZ FEC AUTO NID 0000 Azimuth AZ Woods Hole, MA Elevation EL 23.1 Woods Hole, MA Relative Azimuth REL 174 Relative to bow of the ship Elevation Trim EL TRIM In 1/10 of a degree

16 Page 16 Azimuth Trim AZ TRIM In 1/10 of a degree Auto Threshold AUTO 0060 In counts THRESH Elevation Step Size EL STEP 0000 SIZE Azimuth Step Size AZ STEP 0000 SIZE Step Integral STEP 0000 INTEGRAL Search Increment SEARCH INC 0010 Search Limit SEARCH 0100 LIMIT Search Delay SEARCH 0030 DELAY Step Delay STEP DELAY N/A System Type SYSTEM TYPE 0069 Controller set for auto search upon power failure or system reset Gyro Type GYRO TYPE 0002 Set for NMEA information string from ship's gyrocompass Polarization Angle Type POLANG TYPE 0072 Set for Automatic - used with Linear Polarized feeds Polarization Offset POL OFFSET 0040 Adjusted with Loral for best cross-pol performance Polarization Scale POL SCALE 0090 N/A - not used on circular polarized antennas Azimuth Blackout Limit 1 AZ LIMIT Does not transmit or try to search in the blackout zone Azimuth Blackout Limit 2 AZ LIMIT Does not transmit or try to search in the blackout zone Azimuth Blackout Limit 3 AZ LIMIT Does not transmit or try to search in the blackout zone Azimuth Blackout Limit 4 AZ LIMIT Does not transmit or try to search in the blackout zone Azimuth Blackout Limit 5 AZ LIMIT Does not transmit or try to search in the blackout zone Azimuth Blackout Limit 6 AZ LIMIT Does not transmit or try to search in the blackout zone Transmit Polarity TX 0004 POLARITY Home Flag Offset HFO 0191

17 Page 17 Codan Power Amplifier (PA) BUC BUC Serial Number 6C40132F0081 BUC Serial number Converter Serial Number N/A No converter required Transmit Frequency Tx Freq Converted transmit center frequency Receive Frequency Rx Freq Converted receive center frequency Transmit Output Level Attenuation Receive Attenuation Rx Atten N/A LNB Fault Control Faults: LNB N/A SSPA Fault Control Faults: Fan N/A Fan Fault Control Faults: SSPA N/A IF Impedence Impedence N/A PA State TX On (RS232) TX On (RS232) TX On (FSK) Transmit Default Last State Compensation Frequency IF Comp Frequency 1014 LO Frequency MHz TX Alarm Threshold 0.0 Burst Power Threshold 0.0 Serial Interface 9600,8,N,1 Packet Protocol NDSATCOM Packet Address 1 Redundancy Mode NON Redundancy On/Off Line N/A Tx Atten N/A TX output controlled by Comtech modem Comtech CDM-570L Satellite Modem (In CONFIG menu) Serial Number Firmware Modem Firmware Average Eb/No 7.0 db Energy/Bit over noise (aka Signal Quality) Framing Mode Unframed Data Interface RS422 RTS/CTS Operation RTS/CTS Loop TX FEC TPC

18 Transmit Modulation TX:MOD Rate ¾ QPSK Page 18 TX Code Rate 3/4 Transmit Data Rate TX:DATA kbps TX Symbol Rate Ksym TX IF Frequency MHz TX RF Frequency MHz TX Output State RX-TX Inhibit Transmit Power Level TX:PWR dbm Comtech modem is used to control BUC output power level Transmit Scrambler TX:SCRAM ON Transmit Clock TX:CLK Internal Modem set to Internal clocking Transmit Spectrum Inversion TX Data Sense TX:TSI Inverted Normal Receive Forward Error RX:FEC TPC Correction Receive Modulation RX:MOD QPSK ¾ QPSK Receive Code rate RX:Rate 3/4 Receive Data Rate RX:DATA kbps Receive Symbol Rate RX: Sym Ksym RX IF Frequency RX: IF MHz RX RF Frequency RX: RF MHz Receive Demod RX:ACQ +/- 30 KHz Acquisition Sweep Range Receive Descrambler RX:DESC ON Receive Buffer RX:BUF Disabled Receive Spectrum RX:RSI Normal Inversion Receive Data Sense Normal Eb/No Alarm Point RX:EbNo 2.0 db Frequency Reference Internal 10 MHz TX FIFO Alarm MASKED G.703 BPV ALARM MASKED TX AIS Alarm MASKED AGC Alarm ACTIVE Eb/No Alarm MASKED RX AIS Alarm MASKED Buffer Alarm MASKED Reference Alarm MASKED BUC Alarm ACTIVE LNB Alarm ACTIVE

19 Page 19 BUC M&C FSK Comms ON BUC RF Output ON BUC FSK Address 01 BUC DC Power ON BUC 10 MHz Reference ON BUC Current Alarm Upper Limit 3500 ma Lower Limit 1000mA BUC LO Frequency BUC Frequency Mix High Side LNB DC Supply LNB 10 MHz Reference LNB Current Alarm Upper limit Lower Limit LNB LO Frequency LNB Frequency Mix Remote Control OFF OFF 600mA 010mA MHz Low Side Local