Echos and power supply

Since we have a pulse visible on an oscilloscope, we can go to the next step: having an echo using the probe. Unfortunately, some problems remain.

The first ones are concerning the probe itself. We do not know which pin of the motor’s connectors should be connected, we must insert linseed oil in the probe, connect the BNC connector to the pulser and understand why the impedance of the probe measured with a multimeter is only 6 ohms. The last problem is concerning the power supply: we need a continuous 100V.

Concerning the linseed oil and the BNC connector, we easily found a way to solve these problems (we found the connector in the LISA and the linseed oil at home). For the impedance, our colleague Luc on the slack (the one who sold us the probe) explained that the impedance is a imaginary one, so it’s high only when a high frequency voltage is applied to it. We are still looking for the pins connections.

We can not use the probe for now, so we sent our pulse in the oscilloscope (too see it), regain the signal (the echo of the oscilloscope) with the same cable and then connect the output of the echo (the TLVout) to the oscilloscope again. Here is the result:

We found the power supply (0-500V continuous) in the electronics laboratories. Using it, we can obtain a scalable pulse visible on a oscilloscope.

The next step is to use the probe and do the firsts tests with it.

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