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EleonoraCapocasa - 20:15, Monday 21 January 2019 (1181)Get code to link to this report
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
1181_20190121121330_board1.jpg 1181_20190121121337_board2.jpg
Comments related to this report
YuhangZhao - 17:11, Monday 28 January 2019 (1192)
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