Tektronix - Dual Scope Synchronization

Our thanks to Tektronix for allowing us to reprint the following article.

Introduction

The Tektronix DPO/DSA/MSO70000 models above 12GHz in bandwidth provide 50 GS/s sampling rate on each of 4 channels simultaneously, or 100 GS/s sampling rate on 2 channels in interleaved mode. With interleaved operation comes the opportunity for using two instruments, synchronized together, to get 4 channels sampling at 100 GS/s.


The 100 GS/s operation is facilitated by interleave circuitry which is integrated into the acquisition system internal to the scope. Switching from non-interleaved to interleaved operation only requires changing the sampling resolution through the front panel control (the resolution knob) or through the programmable interface.


Why go to the expense and trouble of synchronizing two instruments? For some applications, such as coherent signal analysis of complex modulated optical signaling, the 20% noise reduction achieved with oversampling results in critical improvement in bit error ratio performance in challenging low level signal environments...


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