Now that the ETMSUS is back up and running I reran my measurements from the beginning of the process. The results below show a change in gain between the before and after measurements. I have given values of the low-frequency section below.
Average Gain difference from the TFs: 18.867 (excluding thee side change)
| |
Before |
After |
Gain difference |
| UL |
-31 dB |
-5 dB |
19.952 |
| UR |
-36 dB |
-10 dB |
19.952 |
| LR |
-27 dB |
-2 dB |
17.782 |
| LL |
-37 dB |
-12 dB |
17.782 |
| SIDE |
-48 dB |
-45 dB |
1.412 |
I also am noting the new values for the OSEM DC output: average gain increase: 9.004
| OSEM |
DC OFFSET Before |
DC OFFSET After |
Gain increase |
| UL |
557 |
5120 |
9.19 |
| UR |
568 |
5111 |
8.99 |
| LR |
780 |
7041 |
9.02 |
| LL |
385 |
3430 |
8.91 |
| SD |
328 |
2922 |
8.91 |
In addition, the oplev position was:
| |
Before |
After |
| OPLEV_PERROR |
-16.055 |
-16.715 |
| OPLEV_YERROR |
-6.667 |
-16.597 |
All data and settings have been included in the zip file
From the average gain increase of the TFs which indicates the increase of the whole system and the increase in gain from the OSEM we can calculate the gain from the actuators.
18.867/9.004 = 2.09
thus the increase in gain on the actuator is about 2.09
EDIT: I updated the side TF with one with better SNR. I increased the excitation amplitude. |