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Synchronizing the Multimeter With a Switch Module This program example demonstrates how to synchronize the multimeter with a switch module. The 4152A uses the TTL triggers from the VXI backplane to trigger the multimeter and advance the channel scan list. The example uses the Racal 1260-38 128-Channel Multiplexer Module but will also work with any Racal Multiplexer module as long as the scan list is specified properly. Figure 2-2 illustrates the set up. The switch module (multiplexer) and multimeter use the VXI backplane to communicate the trigger and VM Complete signals to each other to synchronize the scan. Racal 1260-00C Racal 4152A Racal Instruments Racal 4152A Racal 1260-38 Racal Instruments 1260-38 Racal Instruments 1260-00C Racal Instruments Racal Instruments 1260-38 Racal Instruments 1260-38 4152A Racal 1261B Chassis Racal 1260-38 Figure 2-2. Racal 4152A Multimeter and Switch Module Synchronization Chapter 2 Using The Instrument 47