I tested the LVDT card modified by Tomura-san. The pin #14 of AD630 (demodulator) was grounded for the gain-of-two configulation.
Outputs of the card were compared with the original card using IP channels (H1~H3).
| Original [V] | Modified [V] | |
|---|---|---|
| H1 | -0.31 | -0.54 |
| H2 | 0.30 | 0.58 |
| H3 | 0.06 | 0.10 |
The outputs of modified card were about two times larger than the original card. This result is reasonable.