Optoscan - CAIRN RESEARCH - (Version JPG) - Page n° 39 - PDF Catalogue | Technical Documentation

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Optical filter, Demultiplexer, Light, Monochromator, Wheel

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Connector Descriptions


16	27	Mid bit of encoded wavelength output
17	9	High bit of encoded wavelength output
18	28	Ready output⁶ (high when requested wavelength is reached)
19	10	Programmable timer output 1⁷
20	29	Programmable timer output 2
21	11	Programmable timer gate input 1
22	30	Programmable timer gate input 2
23	12	Low bit of external wavelength input⁵
24	31	Mid bit of external wavelength input
25	13	High bit of external wavelength input
26	32	Go input⁸ (rising edge to go to requested wavelength)
27	14	New position output⁹ (gives high level pulse whenever system starts to change wavelength in any mode)
28	33	Sync (80196 HSO1) (logic high for filter 1 during program)
29	15	Timed output (80196 HSO2) (not currently supported)
30	34	Timed output (80196 HSO3) (not currently supported)
31	16	Connected internally to IDC pin 27
32	35	Connected internally to IDC pin 18
33	17	Timed input (80196 HSI2) (not currently supported)
34	36	Timed input (80196 HSI3) (not currently supported)
35	18	+5V power supply output
36	37	Digital ground
37	19	Analogue ground

Notes:

1. The user DAC is normally used to indicate the current wavelength, with a linear transfer function giving 0V at 300nm and +5V at 800nm, i.e. 10mV per nm However, any alternative transfer functions can be programmed.

2. Unlike the other input pins on this connector, this pin will be at logic high level if not connected, which corresponds to the ready state. For normal use it can therefore remain disconnected. Integration of optical signals by the our photometry modules is disabled while this input remains low.

3. This pin is currently reserved for possible independent control of a shutter elsewhere in the system. However, the slits status output on IDC pin 7 can already be used to control an external shutter synchronously with the shuttering action of the slits if required.

4. If preferred, the go input on IDC pin 26 can be used instead. These two inputs are ORed together by the internal software, to allow either or both of two external sources to control this function. If

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Optoscan - CAIRN RESEARCH - #39

Optical filter, Demultiplexer, Light, Monochromator, Wheel