AMY Meeting. 21 Mar 2011
AMY@Lecce: what is new?Auger Lecce Meeting, 21-03-2011
AMY Meeting. 21 Mar 2011
AMY- tests in Lecce AstroParticle Lab
Signal Generator R&S SMB100A 9kHz to 3.2GHz
Power Detector ZX47-60-S+ containing AD8318
1.7 GHz RF frequency-40 dBm level150 ns pulse width
1.7 GHz RF frequency-30 dBm level150 ns pulse width
Using Oscilloscope - RT LeCroy (3GHz)
Signal from Generator
AMY Meeting. 21 Mar 2011
10 ns0 50 ns0
100 ns0150 ns0
AMY- Power Detector Signal Vs Pulse Width
SEGNALE
TRIGGER
AMY Meeting. 21 Mar 2011
Power Detector(ZX47-60-S+) Time response
• Signal Pulse Width from 10 nsec to 200 nsec• 2 different frequencies (1.7 GHz and 2.6 GHz)
INPUT Signal
OUTPUT Signal ( PeakToPeak measure)
The power detector seems fully efficient only for signals having a pulse > 100 nsecA similar temporal behaviour on rise/fall.
• Rise Time > then specifications
AMY Meeting. 21 Mar 2011
Using different couplingsin input from the oscilloscope
Power Detector(ZX47-60-S+) Time response
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 %
T
T T
AMY Meeting. 21 Mar 2011
INPUT Signal
Power Detector from Maxim Time response
• Signal Pulse Width from 10 nsec to 180 nsec• 3 different frequencies (1 1.7 GHz and 1.9 GHz)
OUTPUT Signal ( PeakToPeak measure)
The power detector seems fully efficient for signals having a pulse > 40 nsecVery much dependent from input RF (see next slide)
home made evaluation board
AMY Meeting. 21 Mar 2011
INPUT Signal• Signal Pulse Width 100 nsec• scan in frequencies: from 0.9 GHz to 3 GHz• scan in signal amplitudes: from -90 dBm to -30 dBm
Power Detector from Maxim
AMY Meeting. 21 Mar 2011
• Small acquisition set-up eventually for acquiring directly the LNB (around 1 - 3 GHz). (using the LeCroy)• Investigating other Power Detectors and/or different evaluation boards.
• 2 more from AD as the one we have in order to modify the board (not working)
• Power Detector from Maxim with larger dynamic range (home made evaluation board) (DONE)
• Trying to understand the time response – 2 more PD in the lab.• FADC-> to be ordered • More LNBF on different bands (C, Ku).
From last meeting:
• Embedded CPU for VME working. • Programming for TDC aquisition.
• Investigating the 2 Power Detectors now in the lab, mods in the board for the time response investigation.
• Switch on the LNBF• Antenna for S Band (to be finalized)• Linearity of PowerDetector• Power Supply (for the AMY test Beam)
More done/to do: