Difference between revisions of "Metalica TestPulseoutput 12-20-07"
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The bottom line appears to be that we get a x4 attenuation and not a net amplification deispite our efforts the change the configuration for the better. We also note that channels 1-11 of the postamp proto type attenuate by a factor of four but channels 12-16 have a signal independent of the input. | The bottom line appears to be that we get a x4 attenuation and not a net amplification deispite our efforts the change the configuration for the better. We also note that channels 1-11 of the postamp proto type attenuate by a factor of four but channels 12-16 have a signal independent of the input. | ||
| + | Input pulse amlitude was changed and preamp voltage was set around 5.2 Voltes. | ||
| + | {| border="1" cellpadding="20" cellspacing="0" | ||
| + | |- | ||
| + | |Input pulse(mV) | ||
| + | | | ||
| + | |- | ||
| + | |40 || [[Image:metalica_40mv_input-post_out_20_12_07.jpg|200px]] | ||
| + | |- | ||
| + | | 70 || [[Image:metalica_70mv_input-post_out_20_12_07.jpg|200px]] | ||
| + | |- | ||
| + | | 160 || [[Image:metalica_160mv_input-post_out_20_12_07.jpg|200px]] | ||
| + | |}<br> | ||
| + | |||
The voltage was changed<br> | The voltage was changed<br> | ||
Latest revision as of 17:27, 21 December 2007
I test the DC preamp + postamp output using a pulse generator to create a 40 mV levelpulse that was 10 ns wide in order to simulate a pulse from the drift chamber proto-type.
This time we used Metalica but the results are not so different.
The bottom line appears to be that we get a x4 attenuation and not a net amplification deispite our efforts the change the configuration for the better. We also note that channels 1-11 of the postamp proto type attenuate by a factor of four but channels 12-16 have a signal independent of the input.
Input pulse amlitude was changed and preamp voltage was set around 5.2 Voltes.
| Input pulse(mV) | |
| 40 | 
|
| 70 | 
|
| 160 | 
|
The voltage was changed
PreAmp Voltage
We observed the ouput of a test pule injected into the preamp for several preamp voltage setting. The top (purple) trace is the injected pulse and the bottom (torquoise) trace is the output from the POSTamp.
| Preamp Voltage(Volts) | |
| 3.7 | 
|
| 5 | 
|
| 5.1 | 
|
| 5.2 | 
|
| 5.3 | 
|
| 5.4 | 
|
| 5.5 | 
|
| 5.6 | 
|
| 5.7 | 
|
| 5.8 | 
|
| 6 | 
|