1. Module and Diode Noise Power Spectrum and Correlations

2. Cuts Data from W-band CES #3 Run ID# 3010 B-glitch correction using adc_anomaly_info.txt-w91-multi-v3.txt (default diode rms = 0.2 counts) Not looking at TT modules (modules 85-90) Removed bad modules: 7, 8, 28, 42, 81 Removed bad diodes: module 4 U2 module 38 Q1 Module 40 Q1

3. FFT of Double Demodulated Diode Signals mV 2 /Hz versus freq(Hz) Scan Synchronous Signal Other glitches

4. TT-modules

5. FFT of Double Demodulated Diode Signals mV 2 /Hz versus freq(Hz) Scan Synchronous Signal Other glitches

6. Q1Q2 U1U2 Typical Fit Result to function P 1 /f + P 2 Typically cannot fit the first bin

8. Definition of White Noise Correlation (from I. Buder) F are the frequency components from the FFT F-bar denote complex conjugate of F i,j are diode indices (Q 1, Q 2, U 1, U 2 ) refer to average over all frequencies > 10 Hz

9. DDmod Ideal Combination Correlation Coeff Q1 – Q2 0 U1 – U2 0 Q – U 0.5 From: Chicago Memo on Noise Correlations Assuming NO polarization at input

10. Q1-Q2, U1-U2, and Q-U correlation dependence on power difference between Leg A and Leg B Q1 - Q2 U1 - U2 Q – U

11. Correlation Dependence on Power Imbalance, and Hybrid Imperfection

12. Typical Diode-Diode Noise Correlation versus FrequencyC ij versus freq (Hz)

13. Bad Diode-Diode Noise Correlation versus Frequency from module 9 C ij versus freq (Hz)

14. Noise Correlation Between Diodes (within same module) * I haven’t checked, but this result seems to agree with study by I. Buder

15. What next ? Implement B-glitching correction (done) Analyze 91 modules from one CES (done) Write fitter to fit for 1/f knee and white noise level (done) Write fitter to fit for correlation coefficients (done) Analyze more CES Examine Glitch patterns in FFT (may be due SSS)