QMBox45 User Manual - R Tech Electronics
Contents
1. Technical support 1 General information The QMBox45 series devices are multichannel DACs with USB 2 0 interface Depending on their model the devices may feature 8 to 64 differential analog outputs QMBox45 series devices are versatile tools for generating test and control signals The devices are designed for analog control of measuring and testing equipment parameters They can be used as generators of sinusoidal signals rectangular and sawtooth pulses as well as any multiphase arbitrary waveforms Features e Ultra low glitch impulse e Galvanic isolation of analog outputs from USB e Continuous data streaming from PC memory or hard disc allows to generate non periodic signals of arbitrary form and duration e Free PC software allows to set the form and parameters of generated signals individually for each channel set the frequency and phase of output signals with quasi zero step play files of arbitrary length through the DAC QMBox45 User manual Rev 2 1 2 of 11 2 Specifications Model QMBox45 8 QMBox45 16 QMBox45 24 QMBox45 64 Number of output 8 16 24 32 to 64 channels S SS AS i h 4 i Xy gt a et y 4 a 7 Output signal range 10V DAC resolution 16 bits Aggregate throughput 1 MS s 2 MS s 3 MS s 4 8 MS s all channels Conversion rate one 125 kS s channel Max differential 1 5LSB nonlinearity Output voltage settling2. cyclically through the DAC at a rate of 125 kS s per channel This cyclical process can continue as long as necessary During the operation there is no updating of the internal buffer contents 4 2 Stream output mode This mode allows to generate non periodic signals of arbitrary form and duration and to play files of arbitrary length through the DAC During the operation in this mode the data in the internal buffer of the device updates permanently from the PC memory During the data output from the internal buffer of the device through the DAC the software fills the free part of the internal buffer with the new data from the PC RAM Since the software fills the internal buffer at a rate higher than the rate of data output through the DAC the data transfer session can last for however long and data from the PC RAM passes through the DAC without gaps Note In every QMBox45 series device only 8 DAC channels can operate in stream output mode Other channels of the device if the device model has more than 8 channels can operate in oscillator mode only QMBox45 User manual Rev 2 1 5 of 11 4 3 Synchronization All the modules installed in the device are clocked by the same generator on the interface board That is why in the course of work the modules of the device are precisely synchronised with each other However sometimes it is necessary not only to synchronize the modules with each other but to precisely time the en
3. QMBox45 series devices QMBox45 8 QMBox45 16 QMBox45 24 QMBox45 64 Technical Description and User Manual Revision 2 1 TECH 1 GENERAL INFORMATION ccccssccccsssscececsssccsscocscscssssssosscessduuesessssnccessscussessseacosetecssseodssseesssoressscesrsuecsessescoesesensssstewnccsss 2 AS ASIA O 3 NAAA O 4 4 PRINCIPLE OF OPERATION sisssscssscessssssoscssesssscessessscoseesssssevsnccessvseccsseusssssseasssevsaseosesseesssecdsssssssioceseascescsecasessssonseeses 5 4 1 OSCILLATOR MODE ccsssessscecececsesesececececseneseeeceeeceeseneaeceeececseneaaeeesececsesaaeaesececeeseaaeaeseecceeseaaaeeeeececeaeaeeeeeeeeceeegs 5 4 2 STREAM OUTPUL MODE le pides 5 4 3 SINCARONIZA TON cid 6 5 CONNECTING THE DEVICE ississcsssscsssesssssscccscsonsssssscessssvscssstenscossssveccastescevastscessustesescesvesessesessesvocessosteveossssesdsenasossns 7 5 1 CONNECTING THE DEVICE TO THE PC FOR THE FIRST TIME ssssscccccecsesssstsesececeeseeecesecececseeaeseeeceesenseaeeeeeeeeeeneas 8 3 2 CONNECTING TO THE OBJECT KANE E ca cctaresadesaceceecsugas souoace E EE EEEE 10 6 SOFTWARE E E E E A E EE A 11 6 1 OMLAB SOFTWARE SUITE 0 ot ita 11 6 2 SOFTWARE DEVELOPMENT KIT a a seessedsccecesdessdvoncedcscees ssdeueedeccecaueesaeeneees covasvacecesncesdesasaecdeceeoesSovaaaecdes 11 Contacts http www RTechElectronics com Info RTechElectronics com Common questions Sales RTechElectronics com Sales department Support RTechElectronics com
4. ct the device to the PC via a USB cable As a rule having detected a new device Windows starts the Found New Hardware Wizard In this case you should follow its instructions choosing not to go to the Windows Update site and specifying the ADRV folder on the included CD as the location of the driver Windows might not start the Found New Hardware Wizard automatically returning a driver error message in the notification area in the right bottom corner of the screen ML Device driver software was not successfully installed Click here for details In this case you should start the Device Manager In different Windows OS versions the Device Manager is started differently For example in Windows 7 it can be started by right clicking the Computer icon then Properties and then Device Manager In the Device Manager QMBox device will appear as Unknown device You should right click on it and select Update Driver Software Eg IDE ATA ATAPI controllers IEEE 1394 Bus host controllers lt Keyboards A Mice and other pointing devices Monitors amp Network adapters 4 J gt Other devices jb Unkno Update Driver Software Disable Uninstall and Scan for hardware changes Properties QMBox45 User manual Rev 2 1 8 of 11 After this the Found New Hardware Wizard will start up Ey Device Manager File Action View Help e9 mAIRE Rs gt LL Update Dr
5. hat even an inexperienced programmer who is not well versed in multithreaded and object oriented programming can work with the device A more detailed description of the software development kit is given in the QMBox Programming Guide document that can be found on the site www RTechElectronics com and on the CD supplied with the device QMBox45 User manual Rev 2 1 11 of 11
6. iver Software Unknown Device How do you want to search for driver software gt Search automatically for updated driver software Windows will search your computer and the Internet for the latest driver software for your device unless you ve disabled this feature in your device installation settings gt Browse my computer for driver software Locate and install driver software manually You should select Browse my computer for driver software and specify the DRV folder on the included CD as the location of the driver Then you should follow the instructions of the Wizard Once the driver is successfully installed the RT USB30K QMSystem Crate Controller USB device should appear in the Device Manager gt Ports COM amp LPT b E Processors de Y R Technology Devices LY RT USB30K QMSystem Crate Controller USB p 4 Sound video and game controllers gt qii System devices p Universal Serial Bus controllers This means that the device s Interface board has been identified correctly by the PC the driver is installed and the device is ready to work Afterwards when the QMBox device is connected to another USB port of the PC Windows might once again detect the QMBox device as unknown device In this case you will have to repeat the driver installation procedure as described above QMBox45 User manual Rev 2 1 9 of 11 5 2 Connecting to the object The figure shows the fr
7. og circuits DAC outputs AGND and connected to USB ground inside the device QMBox45 User manual Rev 2 1 10 of 11 6 Software Software of the QMBox45 devices consists of the following components QMLab software suite Software development kit SDK package 6 1 QMLab software suite 1 AS A EA o EEN o IE o E peme E eama A emn The QMLab software suite is a universal software tool for working with QMBox devices It allows performing most standard tasks within measurement automation QMLab allows using the QMS45 device as a multichannel generator of sinusoidal signals DC signals and signals of arbitrary shape and duration those are obtained by playing the user s binary files of arbitrary length through the DAC A detailed description of the QMLab suite is given in the QMLab User Manual document that can be found on the site www RTechElectronics com and on the CD supplied with the device 6 2 Software development kit Apart from the complete QMLab software suite the QMBox45 delivery set includes an SDK package which is software and documentation designed for users who would like to create their own applications for working with the device This software consists of function libraries API and examples of software development The user has a possibility to create full blown applications using just a limited number of library functions These library functions are written so t
8. ont panel of a QMBox45 device QMBox45 16 model consists of 2 QMS45 modules Ports Every QMS45 module which is a part of the QMBox45 device has its own port for the connection to the object The port of the QMS45 module is described in the table where where DACi and DACi are the outputs of i channel of the DAC in a standard variant of the module delivery DACi is connected inside the module to analog round AGND 1 DAC1 output DAC1 output 2 AGND Analog ground 2 AGND Analog ground 3 DAC2 output 22 DAC2 output 4 AGND Analog ground 23 AGND Analog ground 5 DAC3 output 24 DAC3 output 6 AGND Analog ground 25 AGND Analog ground 7 DAC4 output 26 DAC4 output 8 AGND Analog ground 27 AGND Analog ground 9 DAC5 output 28 DAC5 output 10 AGND Analog ground 29 AGND Analog ground 11 DAC6 output 30 DAC6 output 12 AGND Analog ground 31 AGND Analog ground 13 DAC7 output 32 DAC7 output 14 AGND Analog ground 33 AGND Analog ground 15 DAC8 output 34 DAC8 output 16 AGND Analog ground 35 AGND Analog ground 17 AGND Analog ground 36 15 V analog supply output 18 15V analog supply output 37 DGND Digital ground 19 SYN synchronization input See Synchronization Allowable potential on the SYN input is 0 3 5 V relative to the Digital ground contact 37 Note Digital ground is galvanically isolated from the anal
9. ter via USB 2 3 4 B the same device with the cover removed 5 Interconnect board that ensures electric connection of the modules to the interface board Inside the case the QMS45 modules are plugged into the slots of the interconnect board This board joins the modules into a single device and ensures electric connection of the modules to the interface USB board The interface board controls operation of the modules and ensures connection of the device to the PC via USB This scalable modular architecture allows to combine modules of different types ADC DAC Discrete d VO etc in a single device These modules can be combined in one device in any configuration For detailed information about Combined devices see http www rtechelectronics com products qmbox index php QMBox45 User manual Rev 2 1 4 of 11 4 Principle of operation The QMBox45 series devices operate under PC control OS Windows via USB connection Output channels of the devices can operate in two modes in oscillator mode and in stream output mode 4 1 Oscillator mode This mode is intended for the output of simple periodic signals and DC signals In this mode the software fills the internal buffer of the device with the data the buffer size is 32 kSamples per channel before the operation beginning After the receipt of a Start command from the software the device starts to send the contents of its internal buffer
10. time to 0 0015 of 2 us full scale Typical THD Noise 83 dB Reference limiting error 0 05 Typical glitch impulse 1 5 nV s Max output impedance 0 002 Q Max output current 30 mA per channel Galvanic isolation of analog outputs from 1 kV USB PC interface USB 2 0 Power supply 100 240 V AC or 24 V DC External environment from 5 C up to 55 C with relative moisture from 5 up to 90 Dimensions mm 140x190x40 140x190x60 140x190x80 260x260x160 1 Output current lt 10 mA 2 Output current lt 10 mA QMBox45 User manual Rev 2 1 3 of 11 3 Architecture The basic components of QMBox45 devices are 8 channel QMS45 DAC modules that are installed into one case Depending on the number of modules installed a QMBox45 device can have 1 2 3 or 8 module configurations thus different models of the device differ in the number of output channels DS ee Y Model QMBox45 8 QMBox45 16 QMBox45 24 QMBox45 64 Number of the QMS45 modules 1 2 3 4to8 installed Number of 8 16 24 32 to 64 output channels Dimensions 140x190x40 mm 140x190x60 mm 140x190x80 mm 260x260x160 mm The two module device QMBox45 16 is used to demonstrate QMBox45 internal construction A the assembled device 1 Bottom shell 2 3 QMS45 DAC modules 2 pieces 4 Interface board that controls operation of the modules and ensures connection of the device to the compu
11. tire device to be started by a certain external event By default the device starts the data output through the DAC since after issuing the command Start from a PC This command can be executed within a few milliseconds The exact execution time of this command under OS Windows that is not a real time OS is impossible to be learnt in advance For the cases when it is necessary to bind the start of the data output to any external event with high precision one can use the external start synchronization mode In this mode for the beginning of the data output after the issuing the command Start from a PC it is necessary to give a negative digital pulse logical 1 0 1 to the SYN contact of the device The data output begins right after logical 1 to 0 front arrives The duration of the SYN impulse i e of the logic 0 must be at least 50 ns The SYN line has an internal pull up resistor so one can just short the SYN line to ground to generate the required pulse Switching between start synchronization modes of data output is software selectable QMBox45 User manual Rev 2 1 6 of 11 5 Connecting the device The figure shows the rear panel of a QMBox45 device Link LED A O USB Port Power Supply Port Link LED turns on when the device is connected to USB and signals that the USB port of the computer has identified the device correctl
12. y USB port type B A standard connector for connecting the device to the PC via USB with an standard USB A B cable Power Supply Port it is used for supplying power from an external supply included in the delivery set The procedure of connecting the QMBox series devices is as follows 1 Comnect the power supply from the delivery set of the device to the Power Supply Port of the device 2 Comnect the power supply from the delivery set of the device to AC network 3 Connect the device to the PC via a USB cable At this the Link LED should turn on When the device is connected for the first time driver installation might be required For further information see Connecting the device to the PC for the first time 4 Connect the object to the device see Connecting to the object The procedure of disconnecting the the QMBox series devices is as follows 1 Disconnect the object from the device 2 Disconnect the device from the PC 3 Disconnect the power supply from the AC network 4 Disconnect the power supply from the device QMBox45 User manual Rev 2 1 7 of 11 as Connecting the device to the PC for the first time When the QMBox series device is connected to a Windows PC for the first time it is necessary to specify the location of the device driver Before connecting the device to the PC for the first time you should first insert the included CD into the CD ROM drive of your PC and only then conne
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