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Q.seriesGantner Instruments Test & Measurement GmbH 194 Connection → Synchronization of several systems4.2.2.2 Establishing connection with ICP 1001. Make sure that the current version of the ICP 100 software isinstalled on your PC.You will find the current version in the download section ofour home page. If necessary, install the current version; referto Section 5.1 on Page 66.2. Start the software and select Communication > Parame-ters.3. Under Interface type select the RS-232 direct connectionand under ComPort the PC connection you are using.4. Close the dialog with OK.The program searches the specified interface for connectedmodules and displays all the modules found in the programwindow. If there are addressing conflicts, they are also dis-played. Specify unique addresses for the modules; refer toSection 5.2 on Page 67.4.3 Synchronization of several systemsThe synchronization of the Q.brixx modules in one housing (onesystem) is provided through the Test Controller. The Test Con-troller ensures that all subordinate modules operate synchro-nously with the maximum jitter being approximately ±2 μs overall modules.You have various methods of obtaining synchronization, evenwith several systems (refer also to Fig. 4-3 on Page 21):1. Use the time signal in the Test Controllers based on the IRIGstandard (Inter Range Instrumentation Group) to synchronizeall other Test Controllers to one master controller. The mas-ter controller (first device in the chain of devices) uses itsinternal clock for the date/time stamp (gray path in Fig. 4-3).For this type of synchronization you must lay synchronizationlines between the Test Controllers; the maximum length of alllines together is 1000 m. The order of connection is not impor-tant.2. You connect a radio receiver for time signals, e.g. for DCF77which converts the received time signal to IRIG-B, to a TestController. As master controller this then synchronizes allother Test Controllers using IRIG (orange colored path inFig. 4-3). If it is not possible to connect the individual TestControllers via synchronization lines or this is not desired,you can also connect a receiver to each Test Controller (Vari-ant 2b).3. You connect an NMEA-0183 compatible GPS receiver (GlobalPositioning System) to a Test Controller, which then as mas- |
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