HiSeasNet Maintenance Visit Report

Transcription

1 HiSeasNet Maintenance Visit Report Page 1 Ship Visited: Ship Location/Port: RV Knorr Woods Hole Massachusetts Date(s) of work: September 17, 18, 2007 Work performed by: Visit Purpose: Karl Kapusta General Maintenance The purpose for the trip was to perform a general maintenance check on the Seatel antenna system.

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 needed * AC power to Air Conditioner was turned off KK Confirm/Set final air conditioner temperature set point Not Checked (85 deg F) * KK Inspect or change air conditioner filter * - cleaned filter KK Visual inspection of radome (cracks, abrasions, caulk, leaks, excessive grime, etc.), repair as needed * no visible damage or leaks. Very minor dirt & grime accumulation on KK Visual inspection of radome base, legs, and connection to ship (rust, warping, etc.), repair as needed * Page 2 outer radome surface some rust on base legs but no immediate attention required same as last visit in March of 2007 KK Take photo of dome/hub interior KK Perform SeaTel or Vertex service bulletin N/A upgrades/repairs KK Inspect reflector, repair as needed reflector is in good condition. Some scratches on rear surface from contact with inverter mounting plates attached to the antenna pedestal KK Check antenna balance, adjust as needed * antenna re-balance was not required KK Inspect antenna equipment/frame for water or rust, repair as needed frame is clean with no rust visible KK Inspect antenna equipment/frame for loose weights and all weights tight and secure hardware, repair as needed * KK Lube/grease/treat any joints as necessary N/A KK Inspect antenna equipment and wiring harness for loose cables, repair as needed all wires and harnesses tight & secure KK Verify power level to pedestal/motors KK Verify pedestal breaker works, repair as needed - operational 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 KK KK Verify DAC parameters are accessible, correct, and saved * Verify that GPS inputs to DAC function (if GPS is operational) * Verify that gyro inputs to DAC function (if gyro is operational) * see attached ship has two NMEA sources ship still has two gyros available to DAC they need to stay calibrated with each other to maintain Trim

3 Initials Action Notes/Discussion value consistencies KK Verify correct conscan or dishscan settings, adjust as Dishscan OK needed * KK Verify reasonable blackout zone, adjust as needed * no blackout zones programmed KK Verify reasonable search limits or safety stops for given None used location and satellite, adjust as needed KK Check Az/El trim values, correct as needed to get Re-Checked longitude search close * 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 see attached list missing parts. * KK Upgrade SeaTel/controller firmware with maintenance N/A releases as necessary KK Upgrade old ships with Conscan to Dishscan as needed N/A (Revelle, Melville, and Thompson) KK Verify antenna will sweep full elevation range of - Verified motion( degrees physically) KK Verify antenna will sweep full elevation pointing (0 - Verified 90 degrees) when commanded by DAC KK Verify antenna will do a full Azimuth sweep physically at the lowest physical elevation battery inverter plates need to be trimmed to avoid scratching the rear surface of the reflector at lowest Elevation settings KK Verify antenna will do a full Azimuth sweep at the - Verified lowest pointed elevation when commanded by the DAC KK Verify antenna frame lines up with and will safely bump against all rubber stops should it reach the end of its range of motion No Adjustment Needed Codan RF Equipment Initials Action Notes/Discussion KK Take photo of converter panel KK Verify converter is not in an undue alarm state KK Verify power levels at power supply (48 VDC, and 110 VAC). Record VDC and VAC 53 VDC no change from last report 117 VAC no change from last report KK Inspect RF coax cables and connectors, repair as needed KK Verify amplifier cooling fan functions KK Verify amplifier is not being overdriven, correct as KK needed Locate and test RS-422/RS-232 adapter used with converter, modify pinouts so it is not needed, or verify Page 3 cable was re-pinned to RS232 operation no adaptor required

4 Initials Action Notes/Discussion that it is not needed as is. Note status. KK Locate and test DB-9/MIL serial cable that talks directly to converter KK Locate spare LNA KK Record settings (include serial number and wattage for amp, serial number for converter, and amplifier output type) See Attached Page 4 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 approx. 9.5 dbm KK Record settings See Attached KK Upgrade firmware as necessary (at least Rev 1.30) not required KK Replace 5V PSU power cable if needed not required

5 Page 5 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!! 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 Computer room is cool but no thermostat for air conditioner 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. 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

6 Page 6 Discussion General Overall, the equipment is clean and in good working order. The radome has very minor dirt and grime. The radome interior is clean and dry with no evidence of water leakage. The radome base legs are in the same condition as the last visit in March of this year (2007). The legs show some rust, but are not in need of immediate attention or repair. Sanding and repainting is recommended at the ship s next scheduled port maintenance. The Inverter Mounting Plates are located inside the radome and are mounted on the pedestal legs. Under usual conditions these plates are of no concern. However, they could cause some damage to the rear of the reflector in if power is lost in rough weather. Some minor scrapes have already been noted. The corners of the plates should be trimmed back to avoid any further damage to the reflector. System Operation The crew reported some tracking problems, and loss of tracking during rapid turns or very rough seas. While checking the DAC parameters it was noted that the STEP INTEGRAL parameter of the DAC was set 0000, and the AZ & EL STEP SIZES were set to The crew stated that they had experimented with these settings and that these provided the best tracking performance of the antenna. The usual STEP SIZE settings for Dishscan are During the maintenance visit the STEP SIZES were returned to zero ( 0000 ). This improved the Eb/No value on the Comtech modem by approx. 1.5 dbm. However, the crew was told that if further tracking issues occurred they could reset the STEP SIZE parameters to 0003 and report any problems.

7 Page 7 Knorr Spare Parts Item QTY Part Number Description Notes Rev N5 PCU Assembly PCU was replaced original was returned to the Knorr after inspection by Seatel no fault found by Seatel Rev B Level Cage Unit was replaced with spare original was repaired by Seatel and returned to the Knorr Rev B Aux Serial Port Adaptor Conscan Rev B Aux Serial Port Adaptor NMEAH 5. 1 None Home Flag Assembly Sprocket Metal Pin Sprocket Belt Kit MISSING BELT a) Missing b) c) MISSING BELT d) Missing e) None 250V, 2 amp Fuses LNA C-Band LNA Sprocket Rev J2 Shielded Polang Relay Rev I Servo Amp None BLDC Motor, 12VDC, 4.1 amps Loctite Rev G 25 foot PCDAC Cable None PCDAC Software Floppy Disk None Power Cord 20 1 None Shuko Style Power Cord Laptop-to-Converter Communications cable 22 1 None LNA-to-Codan Converter RF cable w/ N connectors

8 Page 8 Photos RV Knorr September 17, 18, 2007 Radome

9 Page 9 RV Knorr September 17, 18, 2007 Radome Base Leg

10 Page 10 RV Knorr September 17, 18, 2007 Radome Base Legs & Hardware

11 Page 11 RV Knorr September 17, 18, 2007 Radome Interior Air Conditioner and Battery UPS Inverter Plates

12 Page 12 RV Knorr September 17, 18, 2007 Codan Transceiver Front Panel

13 Page 13 RV Knorr September 17, 18, 2007 Below Decks Equipment - Front View

14 Page 14 RV Knorr September 17, 18, 2007 Below Decks Equipment Side View - 1

15 Page 15 RV Knorr September 17, 18, 2007 Below Decks Equipment Side View - 2

16 Page 16 RV Knorr September 17, 18, 2007 Below Decks Equipment General Location

17 Page 17 HiSeasNet Satellite Equipment Configuration Ship: Date: Location: Satellite: R/V Knorr 17, 18 Sept 2007 Woods Hole, MA Intelsat AOR Uni t Setting Description Setting Display Setting Value Notes SeaTel Digital Antenna Controller (DAC) Model DAC-97 (Faceplate reads TAC-92) Antenna system Seatel m Circular Polarized w/ 40 watt C- Band SSPA amplifier Serial Number 6198 PCU version 2.06 Firmware Version 3.31m AGC (Normal, On signal) 2000 Value when antenna is peaked up on signal AGC (Normal, Off Signal) 1480 Value of noise when antenna is not on satellite Latitude LAT 42 N Woods Hole, MA Longitude LON 71 W Woods Hole, MA Heading HDG 254 Woods Hole, MA Satellite SAT 307 E Intelsat AOR at 307 E Threshold THRS 1603 Antenna Controller locked to hub carrier Intermediate Frequency IF MHz Shore-to-ship signal frequency to track Azimuth AZ Woods Hole, MA Elevation EL 39.3 Woods Hole, MA Relative Azimuth REL Relative to bow of the ship Elevation Trim EL TRIM In 1/10 of a degree Azimuth Trim AZ TRIM 0013 HFO set to 11 degrees Auto Threshold AUTO THRESH 0128 In counts Elevation Step Size EL STEP SIZE 0000 Azimuth Step Size AZ STEP SIZE 0000 Step Integral STEP INTEGRAL is DAC setting for Dishscan operation Search Increment SEARCH INC 0010

18 Page 18 Search Limit SEARCH LIMIT 0100 Search Delay SEARCH DELAY 0015 Step Delay STEP DELAY 0002 System Type SYSTEM TYPE 0013 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 0009 N/A not used for circular polarized systems Polarization Offset POL OFFSET 0030 N/A - not used on circular polarized antennas 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 Transmit Polarity TX POLARITY 0002 Home Flag Offset HFO 0000 Codan Power Amplifier (PA) Transceiver Serial H MHz Transceiver Number SSPA Serial Number G watt C-Band Transmit Frequency TX Freq Converted transmit center frequency Receive Frequency RX Freq Converted receive center frequency Transmit Attenuation TX Atten 10 db Receive Attenuation RX Atten 0 db Setting was changed from 10 db at last visit this adjustment changed the THRS & AGC levels but did not change system performance LNA Fault Control Faults: LNA Enabled SSPA Fault Control Faults: Fan Enabled Fan Fault Control Faults: SSPA Enabled IF Impedance Impedance 50 Ohms IF Frequency IF Freq. 70 MHz

19 TX Cable Compensation Cable Comp N/A Converter Temp Conv Comp 5700AVG Compensation Type SSPA Temp SSPA Comp Compensation Type SSPA Mode SSPA Mode Codan Reference Override Ref. Override Disabled Packet Protocol Packet Protocol CODAN Packet Address Packet Addr. 0 (00H) Power Up Mode Power Up Last State TX Power level into SSPA -20 dbm Page 19 Comtech CDM-550 Satellite (In CONFIG menu) Modem Serial Number Firmware 1.34 Modem Firmware Average Eb/No 9.5 db Energy/Bit over noise (aka Signal Quality) Transmit Modulation TX:MOD 3/4 - QPSK Transmit Frequency TX:FREQ MHz Ship TX frequency to Hub Station Transmit Data Rate TX:DATA kbps Transmit Forward Error TX:FEC TURBO 3/4 Q Correction Transmit Power Output TX:ON/OFF RTI Mode Transmit Power Level TX:PWR:MAN dbm UAL Transmit Scrambler TX:SCRAM ON Transmit Clock TX:CLK INTERNAL Modem set to Internal clocking Transmit Spectral TX:TSI OFF Inversion Receive Modulation RX:MOD ¾ QPSK Receive Frequency RX:FRQ MHz Receive Data Rate RX:DATA kbps Receive Forward Error RX:FEC TURBO 5/16 BPSK Correction Receive Acquisition RX:ACQ +/- 10 khz Sweep Range Receive Descrambler RX:DESCRAM ON Receive Clock RX:CLK OFF Receive Buffer RX:BUF BUF DISABLED Receive Spectral RX:RSI OFF Inversion Eb/No Alarm Level RX Eb/No 0.1 db

20 Page 20 Framing FRAMING TRANSPARENT Interface Type INTFC RS422 Serial interface to router Remote Control REMCONT LOCAL Automatic Gain Control MASK:AGC ACTIVE Alarm Eb/No Alarm MASK Eb/No ACTIVE Receive All 1s Alarm MASK:RX-AIS MASKED Buffer Slip Alarm MASK:BUF- ACTIVE SLIP Transmit All 1s Alarm MASK:TX-AIS MASKED Input Frequency IMPED 50 OHMS Impedance Logging Interval 00 minutes "00" equals Inactive