EleonoraCapocasa - 20:15, Monday 21 January 2019 (1181)
Additional DDS board assembled
[Matteo, Eleonora]
We have assembled an additional DDS board able to provide four RF signals.
For the assembly, we took as a model one of the two boards already realized at ATC. Pictures of the new board are attached.
The board have been tested and seems to work well.
Now we have three DDS boards providing four channels each. Here the "final" channel assignment we plan to have:
BOARD 1
0: EOM SHG/IR-MC
1: SHG demod + IR-MC demod (use a splitter and adjust each phase with TAMA demod board)
2: EOM OPO
3: OPO demod
BOARD 2
0: EOM FC/GR-MC
1: FC demod
2: GR-MC demod
3: AA QUADRANT demod (is one enough?)
BOARD 3
0: PLL p-pol
1: PLL CC
2: 2omega CC
3: HOMODYNE CC
A new DDS setup for Board 1 and 2 has been saved with the name "Board1_22_01_19.stp" and "Board2_22_01_19.stp"
Images attached to this report
Comments related to this report
| DDS1 | |||
|---|---|---|---|
| channel | function | frequency | phase |
| CH0 | EOM SHG/IR-MC | 15.2MHz | 0deg |
| CH1 | SHG + IR-MC demod | 15.2MHz | 0deg |
| CH2 | EOM OPO | 87.6MHz | 0deg |
| CH3 | OPO demod | 87.6MHz | 135deg |
| DDS2 | |||
|---|---|---|---|
| channel | function | frequency | phase |
| CH0 | EOM FC/GR-MC | 78.0MHz | 0deg |
| CH1 | FC demod | 78.0MHz | ~ |
| CH2 | GR-MC demod | 78.0MHz | 60 deg |
| CH3 | |||