Using
two time stretchers STT100 stretch the coincidence signal at least 100 times. Measure width of the signal in STLM using internal 100 MHz
clock. Using both edges of the clock it is possible to get SPLM time resolution of 5 ns.
Pros:
•Should
work
•Occupies
one input on the STLM
•If stretcher works according to specs then it should be
possible to achieve resolution better than 2 cm
•
Cons:
•Need
to build a simple (NIM?) board
STT100 Specifications:
Inputs and Outputs: 1 each, differential ECL.
External Clock Required for long base: 60 - 100 MHz.
Normal Stretch Ratio: 20:1.
Range: 0-32 us
LSB: 25 ps when used with a 500 ps LSB multi-hit TDC. Calibration
method employs LeCroy
propriety technique; patent applied for.
Operation Modes: Common Stop or Common Start.
Double pulse Resolution: < 800 ns with 61.5 MHz
clock.
Packaging: Surface mount board, 1.5" x 3".
Power: +9 V, +5 V, -5 V, -2 V, -9 V; 2 W total
Proposal 1. Using time stretchers