With Washimi-san.
PR2 LVDT card settings: resistances and phases between signals.
| LVDT | Input gain resistance (kOhm) | Output gain resistance (Ohm) | Phase (µs) | Board and probe point |
| BF GAS | 5.282 | 39.1 | 0 | Left, P0. |
| SF GAS | 5.350 | 38.6 | 7.5 | Left, P1. |
| Not used | 5.330 | 100.2 | 36.6 | Left, P2. |
| Not used | 5.304 | 99.8 | 36.4 | Left, P3. |
| BF-V1 | 5.441 | 26.2 | 38.6 | Right, P0. |
| BF-V2 | 5.533 | 26.1 | 37.0 | Right, P1. |
| BF-V3 | 5.262 | 29.3 | 38.6 | Right, P2. |
| Not used | 4.032 | 101.5 | 36.8 | Right, P3. |
Notes:
- In the phase measurement the signal at probe point is ahead of the reference signal.
- In probe points for channels that are not used, there's a signal whose relative phase can be measured. I don't know where this signal is coming from, there's no LVDT connected. I didn't check the amplitude and I don't think the oscilloscpe did any autoscaling. I should check when we do the measurement in other suspensions.
- Chassis number: S1403050 in PR2 rack.
- We measured the amplitude of the reference signal directly from the signal analyzer using the oscilloscope: it was 5.87 Vpp with nominal value 6 Vpp.
- The LED, at the back of the chassis and associated with the -18 V, was sometimes on and sometimes off; we measured the voltage with the multimeter and it was perfectly fine. It must be a problem with the LED itself. I'll notify AEL group for them to check.
- The phases seem to have been set up on purpose for BF GAS and SF GAS, but not for the BF-V LVDTs. The output gain resistence does seem to have been adjusted for all the used channels.
| LVDT | Input gain resistance (kOhm) | Output gain resistance (Ohm) | Phase (µs) | Board and probe point |
| BF-H1 | 5.219 | 29.9 | 37.2 | Right, P0. |
| BF-H2 | 5.390 | 29.6 | 37.2 | Right, P1. |
| BF-H3 | 5.535 | 28.5 | 36.0 | Right, P2. |
| Not used | 5.304 | 94.5 | 35.6 | Right, P3. |
Chassis number: S1403047.
- In the phase measurement the signal at probe point is ahead of the reference signal.
- Note for Fabian: this information is on page 12 and 13 in the notebook.