Check-list toward being ready for a test-stand test

Noise analysis

• Charge-channel FFT
• Understand noise at ~few KHz when using smaller Rfb
• Check 60 Hz noise using 128 averaging
• Test dunking Rfb in LHe
• Phonon-channel FFT
• What is predicted noise level with our test-box?
• Superimpose predicted noise at test-stand

Test Signals

✓ Triangle wave

Triggering

✓ Random trigger through board command

✓ Trigger synchronized with triangle wave

• Basic threshold trigger

o Ability to save trace and re-arm to get data-set

Squid tuning

• Update labview display of trace and derivative continuously with triangle wave on
• Ability to average traces
• Test DACs with DC changes and check baseline shift in open-loop mode
• Test-signal DAC
• Squid bias DAC
• Lockpoint DAC
• Test DACs triangle wave on and observe expected shifts in labview display
• Squid bias DAC
• Lockpoint DAC

Board Functions

• Understand and test FET heater
• Test charge bias
• Test squid zap

• Do we need any on-board software changes to limit this?

• Test QET zap

• Do we need any on-board software changes to limit this?

• Test LED flashing

✓ On-board software changes to limit time-on

• Test QET bias with proper R

Collect on-board software onto Fritz’s laptop

• ARM code
• FPGA code
• EPROM code
• CPLD code
• USB code
• Figure out a good way to manage the code

Collect the documentation

• Analog circuit diagram
• Digital circuit diagram
• Gerber files
• CSR
• CPLD commands
• Figure out a good way to manage the documentation