HackLab.TO Rb Frequency Reference

This project will be to build a 1U Rubidium 10MHz Frequency Reference for the lab, using an Efratom LPRO-101 reference module. This will be used as our house 10MHz reference, initially to run the system timer of tick.hacklab.to.

Status

• 2013-02-18: Meters are here, and it turns out they can be disassembled to replace the scales, as I'd hoped.
• 2013-02-03: Ordered meters.
• 2013-01-02: Got everything hooked up and fixed some bugs in the buffer board. Now seems to be working. Need to get meters and an enclosure.
• 2013-01-01: Breadboarded up the buffers for the monitoring signals using an LM324 we had laying around, then committed the first part of the signal conditioning board to perfboard.
• 2012-12-31: Started planning/putting together specs for the finished product.

Desired Features / Specs

• Half-width 2U Enclosure (likely Hammond RMCS9038BK1)
  • Front:
    • Analog round meter for Lamp Volts (0-15V w/ 6-9V normal range, 3-14V warning range)
    • Analog round meter for VCXO Volts (0-15V w/ 0.5 - 13.3V normal range)
    • Analog edgewise meter for system temperature
    • LED for Atomic Lock
    • LED for Overheat
  • Back:
    • Fused IEC C14 Power Input
    • 10MHz Buffered Sine 0.5V Output
    • 10MHz Buffered TTL 5V Output
  • Internal:
    • Power supply (19V @ 1.75A ignition, 1.25A warmup for ~5mins, 0.5A running)
    • Buffering for Sine output
    • Buffering/conversion to 5V TTL output
    • Signal conditioning board, containing:
      • Buffering for the Lamp Volts meter
      • Buffering for the VCXO Volts meter
      • Buffering for the Atomic Lock LED
      • Temperature monitoring circuit