When the payload is excited by the coil-magnet actuator, we can see the harmonic noise at the photo sensor signal.
we are thinking these reason,
- come from cable in the chamber, since these cable do not have shield
- come from around electrical circuit
So I investigated around the digital rack.
At first, I tried to measure the transfer function of the Satellite box at X-end, however today I could not do due to a lack of preparation...
therefore I measured the power spectrum of the all photosensor at some situation.
1. the one cable for the sensor-actuator detouched from the satellite box, and I excited (0.5Hz, 10000count, using "awggui") this detouched actuator channel. (Fig.1)
According to Fig.1, we can see the harmonic noise.
2. I detouced the cable between coildriver and satellite box, and I excited same channel. (Fig.2)
However we can see the harmonic noise...
3. finaly I turned off the coil driver. as this result, harmonic was vanished. (Fig.3)
(according to this figure, we can see some peak. this is the resonance frequency of the payload. My failure)
I didn't understand about this wraparound signal at this investigation.
I didn't understand about this wraparound signal at this investigation.When the payload is excited by the coil-magnet actuator, we can seeWhen the payload is excited by the coil-magnet actuator, we can see the harmonic noise at the photo sensor signal.
we are thinking these reason,
- come from cable in the chamber, since these cable do not have shield
- come from around electrical circuit
So I investigated around the digital rack.
at first, I tried to measure the transfer function of the Satellite box at X-end, however today I could not do due to a lack of preparation...
therefore I measured the power spectrum of the all photosensor at some situation.
1. the one cable for the sensor-actuator detouched from the satellite box, and I excited (0.5Hz, 10000count, using "awggui") this detouched actuator channel. (Fig.1)
According to Fig.1, we can see the harmonic noise.
2. I detouced the cable between coildriver and satellite box, and I excited same channel. (Fig.2)
However we can see the harmonic noise...
3. finaly I turned off the coil driver. as this result, harmonic was vanished. (Fig.3)
I didn't understand about this wraparound signal at this investigation.When the payload is excited by the coil-magnet actuator, we can see the harmonic noise at the photo sensor signal.
we are thinking these reason,
- come from cable in the chamber, since these cable do not have shield
- come from around electrical circuit
So I investigated around the digital rack.
at first, I tried to measure the transfer function of the Satellite box at X-end, however today I could not do due to a lack of preparation...
therefore I measured the power spectrum of the all photosensor at some situation.
1. the one cable for the sensor-actuator detouched from the satellite box, and I excited (0.5Hz, 10000count, using "awggui") this detouched actuator channel. (Fig.1)
According to Fig.1, we can see the harmonic noise.
2. I detouced the cable between coildriver and satellite box, and I excited same channel. (Fig.2)
However we can see the harmonic noise...
3. finaly I turned off the coil driver. as this result, harmonic was vanished. (Fig.3)
I didn't understand about this wraparound signal at this investigation.the harmonic noise at the photo sensor signal.
we are thinking these reason,
- come from cable in the chamber, since these cable do not have shield
- come from around electrical circuit
So I investigated around the digital rack.
at first, I tried to measure the transfer function of the Satellite box at X-end, however today I could not do due to a lack of preparation...
therefore I measured the power spectrum of the all photosensor at some situation.
1. the one cable for the sensor-actuator detouched from the satellite box, and I excited (0.5Hz, 10000count, using "awggui") this detouched actuator channel. (Fig.1)
According to Fig.1, we can see the harmonic noise.
2. I detouced the cable between coildriver and satellite box, and I excited same channel. (Fig.2)
However we can see the harmonic noise...
3. finaly I turned off the coil driver. as this result, harmonic was vanished. (Fig.3)
I didn't understand about this wraparound signal at this investigation.When the payload is excited by the coil-magnet actuator, we can see the harmonic noise at the photo sensor signal.
we are thinking these reason,
- come from cable in the chamber, since these cable do not have shield
- come from around electrical circuit
So I investigated around the digital rack.
at first, I tried to measure the transfer function of the Satellite box at X-end, however today I could not do due to a lack of preparation...
therefore I measured the power spectrum of the all photosensor at some situation.
1. the one cable for the sensor-actuator detouched from the satellite box, and I excited (0.5Hz, 10000count, using "awggui") this detouched actuator channel. (Fig.1)
According to Fig.1, we can see the harmonic noise.
2. I detouced the cable between coildriver and satellite box, and I excited same channel. (Fig.2)
However we can see the harmonic noise...
3. finaly I turned off the coil driver. as this result, harmonic was vanished. (Fig.3)
I didn't understand about this wraparound signal at this investigation.
