Test to see whether manager fixes have gotten rid of the mode 1-3 ripple
Routing Q-band to banks A-D. Banks E-H not involved in test.
Info:
Project: TGBT13B _502
Session: 58
Scan Log:
Scan 1: RippleQbandmode1. VEGAS failed to balance. Balanced at -13dB. Went back through logs and this happened in previous runs as well. Balance is at same level. Must be a software update.
Scan 2: RippleQbandmode2.
Scan 3: RippleQbandmode3.
Scan 4: RippleQbandmode1. Running short mode 1 scan to get VEGAS in right state for Jason to check it.
Turned managers off so that Jason can check banks.
can see noise source in all banks except bank A. Bank C doesn't look any different
Connected test tone to banks A, B, C, and D in turn.
Ran check_spec on each bank and save image in /users/jray/
Bank A spikes are go up to -40 dB. Most of signal at -80 dB
Bank B spikes go up to -50 dB.
Bank C is symmetric, but huge spikes in center
Bank D looks okay.
Going to try to calibrate ADCs to see if this fixes things
turned on managers
Scan 5: RippleQbandmode1. configuring system so it's in the right state.
turned off managers so ADC calibration code can be run
configured ADC
turned on managers
Scan 6: RippleQbandmode1. 10minute scan.
turned off managers
turned on managers
loaded a new bof. So the ADCs weren't calibrated last run. Ray and Paul are going to get code working so we can run the system with the calibrated ADCs.
Amanda went to a two hour meeting while Ray was productive and rewrote the manager to accommodate our testing needs.
Scan 17: RippleQbandmode1. 10s scan
Shutting down samplers to recalibrate ADCs.
connected synthesizer
recalibrating ADCs
disconnected synthesizer and connected noise source.
scan 18: RippleQbandmode1. 5min scan
Booyah! no ripples
scan 19: RippleQbandmode1. 10min scan.
scan 20: RippleQbandmode2. 10s scan to change modes.
looks the same.
calibrating ADCs
scan 21: RippleQbandmode2. 10 min scan.
scan 22: RippleQbandmode3. 10s scan to change modes