We deployed the so-called low noise filter implementation designed by D.Passuelo :
- upgrade of the DSP code
- upgrade of the DaqBox server with v12r2
- upgrade of Acl v050p12
The DAC ouput is disconnected with the master laser .
A long test is in progress with :
- a injected noise built wit the SSFS_noise_alt filter
ACL_FILTER_SET SSFS_noise_alt 1 7.53743e-09 1 12
ACL_FILTER_ZEROS SSFS_noise_alt 5000 0.5
ACL_FILTER_POLES SSFS_noise_alt 300 0.5
- the SSFS_B4_GAIN set to 0
- the SSFS_ON flag set to 1 by the ACL_ADC_CH
ACL_ADC_CH SSFS_ON "au" 1 SSFS_DSP_FREQ LSC_SWITCH_SSFS_ON 1 1 "NONE"
- the DSP correction output built with the "O3_SSFS_B4flt_base * O3_SSFS_B4flt_boost3" filters provided by Julia :
ACL_FILTER_SET "O3_SSFS_B4flt_base" 2 -7.8 10000 10
ACL_FILTER_ZEROS "O3_SSFS_B4flt_base" 0 0.
ACL_FILTER_POLES "O3_SSFS_B4flt_base" 14 0.
ACL_FILTER_POLES "O3_SSFS_B4flt_base" 50000 1.50000
ACL_FILTER_SET "O3_SSFS_B4flt_boost3" 1 1 10000 2
ACL_FILTER_ZEROS "O3_SSFS_B4flt_boost3" 1000 1
ACL_FILTER_POLES "O3_SSFS_B4flt_boost3" 50 0.70000
ACL_FILTER_ZEROS "O3_SSFS_B4flt_boost3" 1500 1.
ACL_FILTER_POLES "O3_SSFS_B4flt_boost3" 50 1.
ACL_FILTER_ZEROS "O3_SSFS_B4flt_boost3" 1650 5.
ACL_FILTER_POLES "O3_SSFS_B4flt_boost3" 1650 25.
The goal is to chech the stabilty of the DSP filter output running with the low noise computation algorthim