Quantum Research Group E6248 User Manual Download | Manualshive

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E6248

U s e r M a n u a l

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Summary of Contents for E6248

Page 1: ...1 LQ E6248 U s e r M a n u a l ...

Page 2: ... board has a virtual RS232 serial interface via the USB port that allows connection to a PC for function setup and data viewing The E6248 makes use of QmBtn software which is included Chip Subsidiary Interface The QT chip on this board uses SPI for communications This is directly available on connector J4 For more detailed information please refer to the QT60248 datasheet Materials Provided 1x E62...

Page 3: ...side back cover The main features of the software are described on the following pages Make sure that you explore all of the features of the software in particular The main window QmBtn which provides the ability to monitor the status of all keys and the overall device in real time The settings window QmSettings which allows you to adjust the behaviour of the keys individually to explore the param...

Page 4: ... Setup from Device Reset Device Recalibrate all Keys Key Number Signal Reference Device Status shows status byte return by com mand 0x05 Key Status shows status of the selected not detected key by command 0x8k where k is key number click on any key to show status Send Setup to Device Key Calibrating Key in Detection Key in Error Recalibrate Selected Key ...

Page 5: ...and after sending new setup block Reset After Write Toggle option to automatically send reset command after sending new setup block Start Stop Data Log Toggle feature to record data into a csv file QmSettings Advanced Display advanced key settings QmGraph Join Data Points Draw a solid line in graph Save Options On Close Toggle option to save software settings on close View Key Settings Open the Qm...

Page 6: ...ed explanation of key settings NTHR Negative Threshold is used to adjust the sensitivity of a key Higher values make keys less sensitive Lower values make keys more sensitive NDRIFT Negative Drift is the rate at which drift compensation is carried out for a negative going signal when a key is touched or receives increased loading The value is in sec reference level For a positive going signal drif...

Page 7: ...AKS Adjacent Key Suppression can be enabled or disabled To become active a key with this option enabled must receive the strongest signal relative to other AKS enabled keys Scope Sync sends a positive pulse on Pin 11 S_SYNC that brackets the burst of a selected key GLOBAL SETTINGS changes affect all keys Burst Spacing Defines the interval from the start of one burst to the start of the next Shorte...

Page 8: ...8 E6248 SCHEMATIC Note a full PDF version of this simplified schematic together with board layouts is available at www qprox com toolbox ...

Page 9: ...etect Integrator Level changes colour on detect Lines Indicate One Second Intervals Signal Axis Detect Integrator Axis Negative Threshold Signal Reference Negative Hysteresis Level Sets the Origin for the Vertical Scale Sets the Signal Magnification Factor Legend Indicates Colours of Signal Traces as well as Current Values The QmGraph window shows the signals for a specific key select a key by cli...

Page 10: ... an external keyboard is used it is a good idea to disconnect the on board matrix To do that just cut the links to the matrix LK1 LK11 Links can be reconnected later by soldering a zero ohm resistor on the link pads Communication Port Select OPT1 OPT1 allows the user to switch off the USB chip and communicate directly via the SPI port The SPI signal line can be found on J5 The table below shows th...

Page 11: ...fter the end of a preceding full matrix scan after key 23 then when a sync pulse is received the matrix is scanned once in its entirety If no sync pulse is received in 100ms the part wakes on its own and re scans the matrix once then goes back to sleep Sync pulses should be spaced no more than 99ms apart to prevent this from happening Oscilloscope Sync SSYNC The SSYNC test point can be used to syn...

Page 12: ...12 USB Connector J3 Communication Port Select OPT1 LED Behaviour OPT2 Matrix Connector J2 Links LK12 LK15 SPI Direct Port J5 Oscilloscope Sync SSYNC Links LK1 LK11 ...

Page 13: ...RE substitute D with the drive letter of your CD For very latest release of QmBtn check our web site at www qprox com toolbox Install the USB Drivers With the supplied CD ROM in your CD drive connect the E6248 to your PC with the supplied USB cable Windows will display the Found New Hardware Wizard for the PICDEM FS USB Select Install the software automatically and click Next Windows now installs ...

Page 14: ...a conflict Incorrect Settings on Option Switch Set OPT1 to the On position Noisy or Erratic Signal Noisy Power Supply try a different USB port or PC Cables or Board too Close to Strong Noise Source such as a power line or switching noise source Increase the distance from E6248 to the noise source Place a grounded metal shield between the noise source and the QMatrix board QMatrix Board is not Mech...

Page 15: ...3 8056 5600 Fax 44 0 23 8045 3939 Email sales1 qprox com North America 651 Holiday Drive Bldg 5 300 Pittsburgh PA 15220 USA Tel 412 391 7367 Fax 412 291 1015 Copyright 2005 QRG Ltd All rights reserved Patented and patents pending REV 200 170805 LQ w w w q p r o x c o m Development Samuel Brunet Matthew Trend ...

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