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LC880 Experiment Controller

User Guide

Documentation for the LC880™ Controller

and Trigger™ Control Software v. 5.0

Trigger software ©1996--2002 LabSmith.

This manual ©2002 LabSmith. No part of this document may be reproduced or distributed without the consent of LabSmith.

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Summary of Contents for LC880

Page 1: ...Guide Documentation for the LC880 Controller and Trigger Control Software v 5 0 Trigger software 1996 2002 LabSmith This manual 2002 LabSmith No part of this document may be reproduced or distributed...

Page 2: ...2...

Page 3: ...sable Enable I O 11 Lock Unlock Panel 11 Time base settings 12 CHANNEL PROPERTIES 13 Channel Properties Screen 13 Quiescent States 14 Timing Modes 14 Apply versus Program All Channels 15 Fixed Output...

Page 4: ...Front Panel Controls and Indicators 33 Channel LEDs 33 ALL Channel LED 33 Selecting a Channel from the Front Panel 34 Performing a Front Panel Function 34 Enable Disable ALL 35 Enable Disable Channel...

Page 5: ...oad See http www labsmith com for more information The LC880 includes eight TTL compatible inputs and eight TTL compatible outputs Voltages in the range 2 5 5 V are TTL highs and voltages in the range...

Page 6: ...LC880 6 Plug your experimental equipment to the LC880 7 Run the experiment using the LC880 by itself or leaving it tethered to the PC Switch between settings profiles during the experiment to handle o...

Page 7: ...or menu option to view help topics for a particular feature The LabSmith web site www labsmith com also includes helpful applications notes and other technical information to help you use the LC880 I...

Page 8: ...you a short tour of the inputs outputs and controls so you can work with the unit while you learn to use the Trigger software Back Panel Inputs and Outputs The back panel includes the following connec...

Page 9: ...light typically indicates that the channel is in the process of triggering When a channel indicator is off the channel is disabled see Running Experiments Enable Disable Channels Some useful exception...

Page 10: ...sing a button on the Main screen 1 Menu options The File menu lets you open close and save experiment files Trigger files bear a trg suffix The Edit Menu lets you cut copy and paste text as you edit y...

Page 11: ...cludes buttons that let you disable and enable all inputs and outputs to the LC880 With I O disabled input signals are ignored Each output will be held at either a logic low or logic high depending up...

Page 12: ...ntation In Ext time base mode the channels use an external clock input for the time base This input must be TTL level between 1 and 100 MHz applied to the external clock input on the back of the LC880...

Page 13: ...d Three additional buttons appear next to the tabs Disable temporarily disables the channel The channel remains fixed in its quiescent state see Quiescent States below The front panel LED for that cha...

Page 14: ...er Toggled Output When a timing mode is selected the relevant property tabs will be displayed NOTE All timing property tabs include a space for Notes These notes are saved and appear in the Main Scree...

Page 15: ...emented on the LC880 until you click Set All Channels button on the Main screen or choose Program Program All Channels Program All Channels is the same as clicking Apply for all channels and then inst...

Page 16: ...front panel LED for the channel will glow green when the output is Low or red when the output is high To try passive mode On Channel A s Settings screen select the Output Input timing mode In the Fun...

Page 17: ...range from 0 64 s to 52 4 ms in increments of 160 ns In low res mode pulse and duration can range from 30 1 s to 3 35 s in increments of 10 24 s Trigger automatically rounds entries to the nearest al...

Page 18: ...tion and delay times of less than 52 ms Delayed Pulse After Trigger Mode Upon receiving an input signal a delayed trigger waits a specified delay time then sends a pulse to the channel output This mod...

Page 19: ...ed between resets between 0 and 2 147 483 647 To allow a channel to be triggered again after reaching the limit press the Reset button on the LC880 or choose Program Reset Channels in Trigger Trigger...

Page 20: ...5 ns the actual delay is incremented by 10 ns every second trigger event The front panel LED for the delayed trigger will glow green until an input signal is detected The LED will be unlit for the de...

Page 21: ...ing Input Edge Trigger then click Apply Depress and hold the trigger button The channel will trigger only once no matter how long you hold the button Release the button and depress it again and the ch...

Page 22: ...on input high Allows the channel to be repeatedly triggered while an input is high Trigger on rising input Sets the channel to be edge triggered i e an input signal that stays high will only trigger...

Page 23: ...each time a pair of pulses is measured To retain the current measurement check the Hold measurement button the counter will not update the delay display until this button is cleared NOTE To switch fro...

Page 24: ...annel B s properties tab select Clock mode Enter a delay of 54 ms and a duration of 79 ms Click Apply 3 On Channel C s properties tab select Clock mode Enter a delay of 87 ms and duration of 85 ms Cli...

Page 25: ...alculated and used to time the triggering of an experimental device The Dynamically Delayed pulse includes several properties tabs Scaling In the calculation of the delay the measured delay between tw...

Page 26: ...ther properties are the same as for the delayed trigger Triggering The triggering options are the same as those for Delayed Pulse After Triggering mode Normal The channel can retrigger an unlimited nu...

Page 27: ...3 On Channel A s Logic tab enter inA not in1 4 On Channel B s Properties window select Delayed Trigger mode with a delay and duration of 100 ms each Setup for edge triggering and allow retriggering 5...

Page 28: ...e the initial state which may be either low or high The front panel LED for the channel will glow green when the output is low or red when the output is high Logic A channel s logic determines the com...

Page 29: ...ger Channel B when the output of Channel C is low while Input 2 is high Here s an example that s more complicated still inB in1 or in2 and outC or outD Here Channel B requires a signal from Inputs 1 o...

Page 30: ...input of the timing channel they are not connected to the rear BNCs These symbols can only be on the left hand side of an assignment for example inA outB is valid but inA inB is not in1 in8 inputs 1 t...

Page 31: ...event1 in1 or in2 and outC or outD Now you can use event1 in the logic for Channels F G and H inF event1 To view the global variables click the Globals button on the Logic tab The Globals screen will...

Page 32: ...nnels While the logic is transferring the Power LED on the LC880 will turn red Logic transferring typically takes only a second though it may take slightly longer for complex programs After the transf...

Page 33: ...nt Channel LEDs As mentioned earlier the LEDs for each channel provide information on each channel s status a A green light on a channel typically indicates that the channel is waiting for an input tr...

Page 34: ...l In the image below the F channel button has just been pressed The buttons for the four available functions Enable Disable Trigger and Reset glow yellow Performing a Front Panel Function Front panel...

Page 35: ...is volatile channels will be re enabled on power up To disable a channel in a non volatile way set the timing mode to Fixed or disable the input by setting the logic to LOW etc You can also disable a...

Page 36: ...on for the Settings profile Similarly to recall a stored Settings profile 1 Click the Recall button 2 Click the two letter combination for the Settings profile You can recover these settings even afte...

Page 37: ...al and Trigger Control Software To obtain the most up to date version of this user s manual and the Trigger Control Software please refer to our website at http www labsmith com Corrections to this us...

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