Teledyne Princeton Instruments PI-MAX 3, System Manual

Page: 182 / 250

182 PI-MAX
®
3 System Manual Issue 2
2. We now set the sequential gating parameters for 20 ns gate width and
101 images/spectra {frames} at 10 ns per image/spectra {frames}. This spans the
1

s.
We set the starting gate delay of 25 ns, ending gate delay of 1025, and take the
sequence. We can then quickly look through the images or spectra (in WinX/32 or
LightField) and see to the nearest 10 ns when the optical pulse arrived.
3. Assuming we found the signal in the 12
th
frame, we now set a narrower gate (e.g.,
3 ns) and sweep about this value in 500 ps steps with a span of 60 ns to find the
time within 500 ps.
Adjust the experiment for best signal strength and/or signal to noise ratio, then
jump down to the final gate width (if width < 500 ps is desired) and again do a
sweep to find the exact timing that maximizes the result. This method has the
advantage of assuring that the camera is seeing the pulse with the most favorable
set-up before narrowing the gate width down.
WinX/32 LightField
Number of Images/Spectra: 101
Gate Mode: Sequential
Number of Frames: 101
Starting Gate Delay: 25 ns
Starting Gate Width: 20 ns
Ending Gate Delay: 1025 ns
Ending Gate Width: 20 ns
Reported Date Delay Increment: 10 ns
WinX/32 LightField
Number of Images/Spectra: 121
Gate Mode: Sequential
Number of Frames: 121
Starting Gate Delay: 116 ns
Starting Gate Width: 3 ns
Ending Gate Delay: 176 ns
Ending Gate Width: 3 ns
Reported Date Delay Increment: 0.5 ns
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