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: