- OVSA observations will not be compromised; so all signals and
control room utilization will be separate from current system.
- Broadband RF will be piped into the control room for further
- All data processing after digitizer will be software-based.
- 1-18 GHz splitters to split OVSA RF signals (3)
- Optical links (transmitters, receivers, fiber) for RF (3)
- Optical breakout boxes at antennas (buried?) (3)
- RF Amplifier (1-12 GHz) to boost signal from optical link (3)
- 1-12 GHz mixer (3)
- Tunable LO system (generated by YIG) (1)
- Filter bank to implement switchable IF bandwidth (3)
- IF amplifier (to 500 MHz) (3)
- Digitizer (up to 1 Gs/s) (3 channel)
- Storage and analysis PC (1)
- Control system (to tune YIG, switch bandwidth, initiate data
- 1-18 GHz RF switch (3)
- Fixed 12 GHz LO source (1)
- Additional optical link (transmitters, receivers, fiber) for LO
- Phase lock system?
- 12 GHz mixer (3)
- Do we need phase switching for DC stabilization, sine/cos components? How do we implement that?
- What control room space will be needed? One rack plus one or two PCs?
- We will need new trenches for optical fiber. How deep, 1 meter or more? This may be difficult given the
existing buried cable. Are we
going to use equal lengths?
- Should we investigate using hardware correlation instead of
- What is the basic design of the software correlator?
- Do we need gain control?
- What are the issues this system will resolve in the prototype
stage? A software correlation may
not be wise for phase stability studies.
- What calibrations are needed, and how will they be done?