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Summit Radio Maintenance and IF Motor Testing

Summit Radio Maintenance and IF Motor Testing. By: Blake Stene Akamai Internship W.M. Keck Observatory Mentor: Jason Chin Home Institution: Hawai’i Community College. Projects. Radio Repair and Maintenance Testing IF Motors Collecting RMS Data on IF Motors.

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Summit Radio Maintenance and IF Motor Testing

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  1. Summit Radio Maintenance and IF Motor Testing By: Blake Stene Akamai Internship W.M. Keck Observatory Mentor: Jason Chin Home Institution: Hawai’i Community College

  2. Projects • Radio Repair and Maintenance • Testing IF Motors • Collecting RMS Data on IF Motors Photo Taken From: http://www.radioshack.com

  3. How Did I Get Things Done? • Planning • Setting Goals • Execute the Plan • Collecting Data • Getting Results

  4. Mauna Kea • W.M. Keck Observatory is at 13,600 Feet in Elevation • Radios were checked at the summit in the clean room • Radios are important Safety feature for all personnel • Radios are used at the summit for communication between summit personnel Photo Courtesy: Michael Cooney

  5. Repairing and Maintaining Radios • Motorola HT750 and SP50 • I used an analyzer to check radios • (CTCSS) Continuous Tone Coded Sub-audible Squelch or (PL) Private Line. (I used my scanner for this) • Microphone Sensitivity • Received Signal • Power Output (Watts) • Updated the Database

  6. Status • 52 Radios Checked • 43 Radios Working Fine • 9 Radios Out of Service (Need Servicing) • 3 New (HT750) Radios are Missing • 8 Old (SP50) Radios are Missing

  7. Some of the Problems • Dirty Speakers (Metal Shavings) • Clean Radio (Oil Incident) • Solder Cracks • Power Output (Watts) • Missing Channel Knob • Low TX & RX Audio (TX Audio 0.3µV Normal)

  8. Things I Learned • Analyzer • Power (Watts) • RX and TX Sensitivity • Sensitivity of Microphone • CTCSS or PL • Solder Cracks • Database • Graphs

  9. Actuator 850 Motors • I used the Pewin 32 program • Actuators are used to adjust for the error in mirrors • I collected data on each motor to document the limits • I changed the software limits so that I could hit the position limits • I checked the software and position limits + and – • I recorded the data on Excel • 2 broken motors will be sent in for repair Photo Courtesy: Michael Cooney

  10. RMS Data

  11. Mahalo • Mentor: Jason Chin • Eric Appleby • Sarah Anderson • Ed Wetherell • Malika Moutawakkil Bell • W.M. Keck Observatory • Hawai’i Community College • This project is supported by the National Science Foundation Science and Technology Center for Adaptive Optics, managed by the University of California at Santa Cruz under cooperative agreement No. AST – 9876783.

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