[Jon, Yehonathan]
Summary
With the Acromag chassis now permanently installed, we tested the C1PSL channels going over the channel list one by one, excluding the IMC channels which Gautam is taking responsibility for (the servo board itself is also in question).
The strategy is to check the response of input channels to specific output channels for expected behaviour whenever is possible.
We marked on the channel list spreadsheet the status of the channels that were tested.
In more detail
FSS
| Channels under test |
What was done |
| C1:PSL-FSS_SW1 |
Switched C1:PSL-FSS_SW1 and observed the IMC unlock |
| C1:PSL-FSS_SW2, C1:PSL-FSS_MIXERM |
Connected a signal to Test2 on FSS box and observed a proportional change on C1:PSL-FSS_MIXERM |
| C1:PSL-FSS_INOFFSET |
Disconnected feedback by switching C1:PSL-FSS_SW1. Tweaked C1:PSL-FSS_INOFFSET and observed a proportional response in C1:PSL-FSS_MIXERM |
| C1:PSL-FSS_MGAIN, C1:PSL-FSS_PCDRIVE |
Disconnected feedback, turned on some offset using C1:PSL-FSS_INOFFSET. Tweaked C1:PSL-FSS_MGAIN and observed a response in C1:PSL-FSS_PCDRIVE |
| C1:PSL-FSS_SLOWDC, C1:PSL-FSS_SLOWM |
Disconnected feedback. Tweaked C1:PSL-FSS_SLOWDC and obsereved a proportional response in C1:PSL-FSS_SLOWM |
| C1:PSL-FSS_FASTGAIN, C1:PSL-FSS_FAST |
Disconnected feedback, turned on some offset using C1:PSL-FSS_INOFFSET. Tweaked C1:PSL-FSS_FASTGAIN and obsereved a response in C1:PSL-FSS_FAST |
Frequency Ref
| Channels under test |
What was done |
| C1:PSL-PMC_PHCON |
Observed the PMC unlocks when a big change in C1: PSL-PMC_PHCON is made |
| C1:PSL-PMC_RFADJ, C1:PSL-PMC_MODET |
Tweaked C1:PSL-PMC_RFADJ and obsereved a proportional response in C1:PSL-PMC_MODET |
| C1:PSL-PMC_PHFLIP |
Observed the PMC unlock when C1:PSL-PMC_PHFLIP is switched |
PMC Servo Card
| Channels under test |
What was done |
| C1:PSL-PMC_SW1, C1:PSL-PMC_PMCERR, C1:PSL-PMC_INOFFSET, C1:PSL-PMC_PZT |
Unlocked the PMC by switching C1:PSL-PMC_SW1. Tweaked C1:PSL-PMC_INOFFSET and observed a proportional change in C1:PSL-PMC_PMCERR and C1:PSL-PMC_PZT |
| C1:PSL-PMC_BLANK |
Observed the PMC unlock with when C1:PSL-PMC_BLANK is switched |
| C1:PSL-PMC_GAIN |
Unlocked the PMC by switching C1:PSL-PMC_SW1. Turned on some offset using C1:PSL-PMC_INOFFSET. Tweaked C1:PSL-PMC_GAIN and observed response in C1:PSL-PMC_PZT |
| C1:PSL-PMC_SW2 |
Unlocked the PMC by switching C1:PSL-PMC_SW1. Connected a signal to TP2 on the PMC card and observed a proportional change in C1:PSL-PMC_PZT. |
| C1:PSL-PMC_RAMP |
Unlocked the PMC by switching C1:PSL-PMC_SW1. Tweaked C1:PSL-PMC_RAMP and observed a change in C1:PSL-PMC_PZT.
|
| C1:PSL-PMC_RFPDDC |
Observed a high value 0.5V when PMC is unlocked and a low value 0.03V when it is locked |
WFSs
| Channels under test |
What was done |
| C1:IOO-WFS*_SEG*_ATTEN |
We misaligned MC1 to get a measurable signal in WFS channels. NDScoped the corresponding C1:IOO-WFS*_SEG*_I&Q channels and observed a change in those channels in response to switching the attenuation on and off.
|
| C1:IOO-WFS*_LO_LOCK_MON |
Disconnected the LO cable from the WFS boards and observed C1:IOO-WFS*_LO_LOCK_MON go to zero. |
| C1:IOO-WFS*_SEG*_I&Q |
Connected a short SMA cable to the 29.5MHz frequency distribution board. Attenuated the signal by 20db and connected it to the different SEG channels one at a time and observed a response in C1:IOO-WFS*_SEG*_I&Q channels. |
| C1:IOO-WFS*_SEG*_DC |
We shined a laser pointer to the different quadrants and observed saturation in the corresponding C1:IOO-WFS*_SEG*_DC with no cross talks. |
MC Servo
| Channels under test |
What was done |
| C1:IOO-MC_SW1, C1:IOO-MC_OPTIONA, C1:IOO-MC_POL, C1:IOO-MC_OPTIONB,C1:IOO-MC_FASTSW |
These switches unlocked the IMC when flipped. |
| C1:IOO-MC_SW2, C1:IOO-MC_SUM_MON, C1:IOO-MC_SLOW_MON, C1:IOO-MC_FAST_MON |
A sine wave signal was injected in IN2 on the servo board. C1:IOO-MC_SW2 was switched on and the value of C1:IOO-MC_SUM_MON, C1:IOO-MC_SLOW_MON and C1:IOO-MC_FAST_MON changed accordingly. |
| C1:IOO-MC_SW3 |
Connected a scope to OUT2 on the servo board. Switched C1:IOO-MC_SW3 on and observed a signal on the scope. |
| C1:IOO-MC_EXCA_EN |
Unlocked the IMC by switching C1:IOO-MC_SW1 off. Connected a signal to EXC A and a scope to TP2A on the servo board and observed the signal on the scope when C1:IOO-MC_EXCA_EN was switched on. |
| C1:IOO-MC_EXCB_EN |
Unlocked the IMC by switching C1:IOO-MC_SW1 off. Connected a signal to EXC B and a scope to TP2B on the servo board and observed the signal on the scope when C1:IOO-MC_EXCB_EN was switched on. |
| C1:IOO-MC_REFL_OFFSET |
Unlocked the IMC by switching off. Tweaked C1:IOO-MC_REFL_OFFSET and observed a proportional change in C1:IOO-MC_SUM_MON. |
| C1:IOO-MC_LATCH_EN |
Tweaked the VCO gain slider and observed the latch switch off and on. |
| C1:IOO-MC_LIMIT |
Unlocked the IMC by switching C1:IOO-MC_SW1 off. Connected a sine wave signal to EXC B and enabled C1:IOO-MC_EXCB_EN. Ramped up the VCO gain. Raised the sine wave amplitude until C1:IOO-MC_LIMIT turned on. |
| C1:IOO-MC_LIMITER |
We ramped the VCO such that C1:IOO-MC_LIMIT was switched on. We switched C1:IOO-MC_LIMITER on and observed C1:PSL-FSS_MIXERM high value go down. |
NPRO Diagnostics
| Channels under test |
What was done |
| C1:PSL-NPRO_* |
The signals were compared to previous values for consistency. Then they were unplugged from the Acromag chassis to confirm their values went to 0 and returned to the same values after being reconnected.
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