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Table of Contents
Addendum: Phosphorimeter Trigger v. 1.0 (13 Aug 2003)
Addendum: Phosphorimeter
Trigger
Introduction
There are two important pins to consider: Pin 5 is for the flash lamp, which provides a
12.8-µs pulse, active LOW. The acquisition delay starts on the HIGH→LOW transition
(< 10 ns jitter). Pin 4 is the phosphorimeter trigger input, which requires a minimum
pulse-width of 200 ns. Acquisition begins at 250 to 350 ns after the HIGH→LOW
transition. Any pulses received when the board is not ready for them are ignored. The
time between pulses should be at least 1 µs longer than the interval between pulses set
in the DataMax software.
Pin connections
Below is a table of connector pins and their use.
Pin #
1
6
2
7
3
8
4
9
5
Note: All inputs are active low; all digital outputs are active low.
Signal
Output opto power
Disable CW xenon lamp (active LOW)
Enable phosphorimeter-mirror position (active LOW)
Valid phosphorimeter-mirror position (active LOW)
Input opto power
Status 1 (reserved for future use)
Trigger phosphorimeter cycle (on HIGH→LOW transition)
Status 2 (reserved for future use)
Flash phosphorimeter lamp (on HIGH→LOW transition)
Warning: Do not connect
pin 1 to pin 3.
1
I/O
(5 V)
O
O
I
(5 V)
I
I
I
O
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Related Manuals for horiba Phosphorimeter Trigger
Summary of Contents for horiba Phosphorimeter Trigger
- Page 1 12.8-µs pulse, active LOW. The acquisition delay starts on the HIGH→LOW transition (< 10 ns jitter). Pin 4 is the phosphorimeter trigger input, which requires a minimum pulse-width of 200 ns. Acquisition begins at 250 to 350 ns after the HIGH→LOW transition.
- Page 2 Addendum: Phosphorimeter Trigger v. 1.0 (13 Aug 2003) Typical circuitry Input A typical input circuit to the user trigger might look like this: USER SPECTRACQ USER I/O CONNECTOR +5V (user supplied) Input opto power Pin 1 470 Ω 74HC or HCT logic...
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