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AMY@Lecce: status Auger Lecce Meeting, 24-03-2011

AMY@Lecce: status Auger Lecce Meeting, 24-03-2011. AMY- Time Response of Power Detector (a reminder from last meeting). Power Detector( ZX47-60-S+) Time response. INPUT Signal. Signal Pulse Width from 10 nsec to 200 nsec 2 different frequencies (1.7 GHz and 2.6 GHz).

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AMY@Lecce: status Auger Lecce Meeting, 24-03-2011

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  1. AMY@Lecce: status Auger Lecce Meeting, 24-03-2011 AMY Meeting. 24 Mar 2011

  2. AMY- Time Response of Power Detector (a reminder from last meeting) Power Detector(ZX47-60-S+) Time response INPUT Signal • Signal Pulse Width from 10 nsec to 200 nsec • 2 different frequencies (1.7 GHz and 2.6 GHz) OUTPUT Signal ( PeakToPeak measure) The power detector seems fully efficient only for signals having a pulse > 100 nsec A similar temporal behaviour on rise/fall. • Rise Time > then specifications AMY Meeting. 24 Mar 2011

  3. AMY- Power Detector Time response- before and after Modifications The AD8318, as used in (ZX47-60-S+) has an external capacitor connected to CLPF (loop filter capacitor) to provide additional filtering for VOUT. However, using the CLPF capacitor slows the response time. For applications requiring maximum RF burst detection capability, the CLPF pin should be left unconnected. PD modified AMY Meeting. 24 Mar 2011

  4. DT • Fall time for a signal level of XX% around the half • amplitude: • 80% from 10% to 90% • 70% from 15% to 85% • ….. • 10% from 45% to 55% XX % DT Power Detector(ZX47-60-S+) Time response DT AMY Meeting. 24 Mar 2011

  5. noise level AMY- Power Detector Linearity Before and after Mods. Power Detector(ZX47-60-S+) Linearity PD modified AMY Meeting. 24 Mar 2011

  6. Power Detector(ZX47-60-S+) AMY- Power Detector Linearity Before and after Mods. AMY Meeting. 24 Mar 2011

  7. Power Detector(ZX47-60-S+) AMY- Power Detector Linearity of Time Response AMY Meeting. 24 Mar 2011

  8. Power Detector(ZX47-60-S+)There is a 10 Ω internal resistor in series with the output driver. Because of this resistor, it is necessary to add an external 40 Ω back-terminating resistor in series with the output when driving a 50 Ω load. Place the back-terminating resistor close to the VOUT pin. The AD8318 has the drive capability to drive a 50 Ω load at the end ofa coaxial cable or transmission line when back terminatedREADY TO TEST! AMY- Power Detector (ZX47-60-S+) a bit more mods to do… AMY Meeting. 24 Mar 2011

  9. DT • Fall time for a signal level of XX% around the half • amplitude: • 80% from 10% to 90% • 70% from 15% to 85% • ….. • 10% from 45% to 55% XX % DT AMY-Characterization of PD(ZX47-60-S+) Fall Time Quite stable answer from the 3 power detectors AMY Meeting. 24 Mar 2011

  10. AMY-Characterization of PD(ZX47-60-S+) Time Response Quite stable answer from the 3 power detectors AMY Meeting. 24 Mar 2011

  11. noise level AMY-Characterization of PD(ZX47-60-S+) Linearity Quite stable answer from the 3 power detectors AMY Meeting. 24 Mar 2011

  12. AMY-Characterization of PD(ZX47-60-S+) Linearity Quite stable answer from the 3 power detectors AMY Meeting. 24 Mar 2011

  13. Conclusion and outlook • Power Detectors. • 2 more from AD with home made board (not working).. Pietro brain storming… • Time response – Investigating the 3 Power Detectors PD(ZX47-60-S+) now in the lab, mods in the board for the time response investigation ! OnGoing • FADC-> ordered ! • More LNBF on different bands (C, Ku). • TO DO • A bit more to do: for time time response investigation- • Switch on the LNBF • Antenna for S Band (to be finalized) • Linearity of PowerDetector (more to do?) • Power Supply (for the AMY test Beam) • Personal Comment We are dealing with Power Detector quite smoothly now …. • It is hard to believe we can reach few nsec time response, but it is also hard to believe that we can reach an high gain without them… -60 dBm is 0.225 mV • More work to be done on feeds and antennas. AMY Meeting. 24 Mar 2011

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